MACHINE TOOL

Description

[0001] The invention relates to a machine tool, in particular a hand-held machine tool, preferably an angle grinder, which has a tool holding device which can rotate about an output axis, wherein this tool holding device is designed to hold a tool device, in particular an insert tool, on the machine tool in such a way that the output axis and a tool rotation axis substantially coincide, wherein the tool holding device has at least one driving device and a clamping device which can be moved relative to the driving device, wherein this driving device has at least one torque transmission region arranged at a distance from this output axis for transmitting a drive force to the tool device. State of the art

[0002] DE 10 2012 007 926 A1, which forms the basis for the preamble of claim 1, discloses a power-driven hand tool comprising a housing with a spindle head, a tool spindle drivable about its longitudinal axis, and a clamping device with a fastening element. The tool spindle has a tool-side end with a holding section for a tool to be driven. The clamping device has a clamping configuration in which the tool can be fixed to the tool spindle by means of the fastening element, and a release configuration in which the tool can be released. The clamping device is designed to be switchable between the clamping configuration and the release configuration by means of a unidirectional actuating movement. Disclosure of the invention

[0003] The invention is based on the object of improving a hand-held power tool using simple design measures.

[0004] The problem is solved with a machine tool according to claim 1.

[0005] The invention is described below primarily using the example of a hand-held machine tool, in particular, which has a tool holder device that rotates around an output axis. However, this limitation of the illustration should not be understood as a limitation of the possible applications of such a machine tool. Instead of the term "tool holder device," the term "tool holder" is used below—for the sake of simplicity. However, this should not be understood as a limitation.

[0006] A machine tool is a device that has one or more drive motors and possibly one or more gear units as well as at least one output shaft with an output axis - to be understood in the geometric sense. The tool holder device is arranged directly or indirectly on the output shaft. The tool holder device is the component or components with which the torque is applied to the tool device, whereby the tool holder device preferably also holds the tool device, particularly in the case of a hand-held machine tool, so that the tool device is both held in place by the tool holder device alone and is subjected to its output torque. The term output torque and the terms formed with output refer to the torque or torque transferred from the machine tool to the tool device.the corresponding components of the machine tool; the term drive torque refers to the torque absorbed by the tool device. The tool device can be designed as an insert tool for grinding, cutting, or other machining of a workpiece.

[0007] A hand-held power tool comprises a carrying device, in particular handles and the like, with which the power tool with the attached tool can be guided and / or held by an operator. Hand-held power tools are typically equipped with an electric drive motor, but other designs, such as power tools driven by an internal combustion engine, or hydraulically or pneumatically, are also known and can be used within the scope of the invention.

[0008] Suitable machine tools include both a stationary machine tool, such as a circular table saw according to applications DE 102010042016 or US 2062969 A, and a non-stationary machine tool, such as a hand-held circular saw according to application DE 3740200 A1, an angle grinder according to application DE102014210915 A1, or a backpack brush cutter according to application DE 19616764 A1. Alternatively, a hand-held chainsaw is also suitable. The non-stationary machine tool can be hand-held or hand-guided. The machine tool according to the invention is preferably designed as an angle grinder.

[0009] The machine tool according to the invention makes it possible to mount or clamp tool devices, particularly for high-speed applications, without the need for tools, so that preferably no additional, particularly removable, securing element, such as a fastening screw, is required to fasten the tool device to the tool holder of the machine tool. The machine tool is thus provided for connecting or clamping a tool device to the tool holder in a particularly quick and convenient manner, so that an operator of such a machine tool can carry out a particularly fast tool change. This also eliminates the need to use an additional tool, such as a wrench or a screwdriver, to connect the tool device to the machine tool or to detach it from the machine tool.

[0010] In particular, as the rotational speed of the tool holder increases, the clamping device can exert an increased clamping force on the tool holder due to a centrifugal force acting on the clamping device, whereby the clamping force acting on the tool holder increases with increasing rotational speed. This is particularly evident in high-speed, rotating machine tools.

[0011] The term "movable" should be understood in particular as being mounted in a movable manner and / or preferably being mounted in a pivotable manner about an axis of rotation.

[0012] The tool holder can be permanently connected to the machine tool. However, the tool holder can also be detachably attached to an output shaft, output spindle, or the like.

[0013] In particular, the clamping device can have at least one, in particular at least two, hook device(s). A hook device is preferably understood to be a rotatable, pivotable, or displaceable device that has at least one active surface for transmitting a clamping force to the tool device.

[0014] In an embodiment of the clamping device with at least two hook devices, these can be designed to be relatively movable, in particular pivotable about a pivot axis, so that they are movable in the radial direction of the output axis. The hook devices preferably have a common axis of movement, in particular a common pivot axis. However, it is also conceivable for the hook devices to have different axes of movement, in particular pivot axes running at least substantially parallel to one another. The axis of movement, in particular the pivot axis, of the clamping device, in particular of the hook devices, preferably runs in a plane running transversely, in particular at least substantially perpendicular, to the output axis. The axis of movement, in particular the pivot axis, of the clamping device preferably forms a clamping device rotation axis.

[0015] The at least two hook devices can be designed to be movable relative to one another, in particular about the pivot axis, in an angular range of up to 50°, preferably up to 40°, preferably up to 30°, particularly preferably up to 20°.

[0016] The clamping device or the at least two hook devices can in particular be present in at least two states, namely in a fastening state or in a release state.

[0017] In a fastening state, the hook devices are extended in a radial direction away from the output axis, in particular such that the hook devices assume a maximum radial extent relative to one another in an extended state. In a fastening state, the clamping device can be provided to hold the tool device in a form-fitting and / or force-fitting manner in the axial direction of the output axis. In a fastening state, the hook devices are preferably connected to the tool device, in particular in engagement, in particular as a result of a movement of the hook devices in the radial direction of the output axis or around the movement axis of the clamping device. The tool device can be holdable on the machine tool in a form-fitting and / or force-fitting manner by means of the hook devices.In a fixed state, the tool device is positively connected to the tool holder device in the axial direction of the output axis. In a fixed state, the driving device can protrude in the axial direction of the output axis relative to the clamping device, in particular the holding devices. In a fixed state, the driving device can limit the axial extent of the tool holder device.

[0018] In a released state, the clamping device, in particular the at least two hook devices, is retracted in the radial direction to the output axis, in particular so that the clamping device, in particular the at least two hook devices, has, at least in sections, a maximum radial extent along a direction running at least substantially perpendicular to the output axis, which is smaller than a minimum radial extent of the recess of the tool device. In a released state, the clamping device, in particular the hook devices, can protrude relative to the driving device in the axial direction of the output axis. In a released state, the clamping device, in particular the hook devices, can limit an axial extent of the tool holding device.

[0019] Preferably, the maximum radial extent of the clamping device, in particular of the at least two hook devices, which in a release state of the clamping device is smaller than a minimum radial extent of the recess of the tool device in an axial section of the clamping device, is arranged in a region of the tool receiving device which protrudes or freely projects in the axial direction of the output axis and is designed to be surrounded by the recess of the tool device. Preferably, the axial section in which the maximum radial extent of the clamping device is arranged is not formed by an axial section of the clamping device which does not protrude in the axial direction of the output axis or is not surrounded or cannot be surrounded by the tool device or the machine tool in a plane by 360°.The clamping device, in particular the at least two hook devices, can be understood as "protruding" if the clamping device protrudes or projects beyond a mounting area for axially mounting the tool device, which limits movement of the tool device in a fastening state and / or a release state in the axial direction of the output axis. The axial section can be considered an axial shoulder of the clamping device, which protrudes relative to the driving device in the release state.

[0020] In a release state of the clamping device, the tool device can be placed on the tool holder device in at least one or at least two steps.

[0021] The tool holder device can have a first attachment region and a second attachment region. The first attachment region can delimit an axial extent of the driving device. The first attachment region can delimit an axial extent of the tool holder device in a fastened state. The second attachment region can surround the first attachment region, in particular in a plane of 360°. The attachment regions extend at least substantially in the radial direction of the output axis and in the circumferential direction around the output axis. The first attachment region and the second attachment region can have a first and second, in particular flat, attachment surface. The first attachment surface is spaced from the second attachment surface in the axial direction of the output axis and is arranged in particular parallel. The attachment surfaces delimit the at least one torque transmission region.The mounting surfaces are oriented away from the tool holder.

[0022] During a placement process of the tool device in a single step, a recess of a connection device of the tool device can have a boundary contour that delimits the recess and is aligned with an outer contour of the clamping device and the driving device, so that the tool device can be placed in the axial direction of the output axis in one, in particular a single, step. The tool device can rest on the clamping device, in particular the hook device. By applying an actuating force to the tool device in the axial direction of the output axis, the tool device can move the clamping device, in particular the hook devices, from a released state to an actuated state. As a result, the tool device can be received with the tool receiving device. In a fastened state, the tool device can rest on the second attachment area.In a fastening state, the tool device rests in the axial direction of the output axis on the tool holding device, in particular the driving device, in particular on the second support surface of the tool holding device.

[0023] During a fitting process of the tool device in at least two steps, in a first fitting step, a recess of a connecting device of the tool device can have a limiting contour that delimits the recess and that, when the tool device is first fitted onto the tool holding device, is aligned about the output axis, in particular rotated, such that the limiting contour is not aligned with an outer contour of the clamping device and the driving device. The tool device rests on the driving device in the axial direction of the output axis and is pre-centered or roughly centered in the radial direction by the clamping device. The tool device can rest on the first fitting area. The connecting device is preferably designed to be rotatable about the output axis, in particular until a positive engagement of the torque transmission area.

[0024] The tool device can in particular be rotated about the output axis until the boundary contour of the recess is aligned with the outer contour of the clamping device and the driving device.

[0025] Preferably, in a second mounting step following the first mounting step, the tool device can be guided in the axial direction of the output axis along the driving device such that the recess of the tool device at least partially, in particular completely, encompasses the clamping device and the driving device. This allows the tool device to be finely centered, whereby the tool device can be arranged on the tool holder device in a rotationally fixed manner about the output axis relative to the tool holder device, in particular the driving device and / or the clamping device. The tool device can rest on the clamping device. Corresponding to the first mounting step, the tool device can then be subjected to an axial actuating force in order to move the clamping device, in particular the hook device, from a released state into an actuated state.The tool device can rest on the second attachment area and in particular form a fastening state.

[0026] The tool device is preferably placed on the, in particular first and / or second, placement area in a position intended for clamping by means of the clamping device.

[0027] The terms "output axis" and "tool rotation axis" preferably refer to a fictitious geometric axis of rotation of the tool holder device and / or an output shaft of the machine tool or a fictitious axis of rotation of the tool device in a state arranged, in particular fixed, on the tool holder device.

[0028] The torque transmission area of the driving device has at least one output surface arranged at a distance from the output axis, each of which has a plurality of surface points. The term "output surface" refers to a surface that, at least in a fastening state of the tool device, is at least partially in direct or indirect contact with the tool device in order to transmit the output torque to the tool device. The term "surface point" defines, in particular, points on the upper side of this output surface and is to be understood geometrically.

[0029] The torque transmission area is intended to transmit the drive torque of the machine tool to the tool device when the tool device is arranged, in particular fixed, on the clamping device. Conversely, the torque transmission area can also be intended to transmit a torque, in particular a braking torque arising when decelerating the tool movement, from the tool device to the machine tool.

[0030] The subclaims specify further expedient developments of the machine tool according to the invention.

[0031] It may be expedient for the tool holder device to have an axial opening which is intended to accommodate the clamping device. The opening can surround the output axis and / or the clamping device by 360° in one plane, in particular a radial plane. A radial plane is to be understood as a plane which extends radially to the output axis. Preferably, the tool holder device is arranged at least partially on an output shaft of the machine tool, in particular at least partially in an inner region of an output shaft of the machine tool which is designed as a hollow shaft. The opening can be formed as a recess in the housing of the machine tool. The clamping device can protrude axially relative to the opening. The opening can be delimited at least in section by the second attachment region. The opening can receive or mount the clamping device in a rotationally fixed manner about the output axis.The opening can be elongated in a radial plane. This allows the tool holder to be designed particularly compactly.

[0032] Furthermore, it may be expedient for the driving device to be formed by at least one driving jaw, in particular serving as a guide jaw. In particular, the driving device can delimit the opening at least partially in the radial direction of the output shaft and / or be arranged at least partially in the opening. According to the invention,

[0033] the driving device is provided to guide the clamping device of the tool holding device, in particular during a movement starting from a released state into a fastened state or vice versa, in particular during an at least partial movement in the radial direction. A movement should be understood in particular to be a relative movement. The opening can be substantially rectangular. Preferably, the at least one driving jaw serving as a guide jaw can delimit the opening along a main extent of the rectangular opening in the radial direction. The opening can surround the output axis in a plane by 360°. Preferably, the opening is arranged between at least two driving jaws of the driving device in a direction running transversely, in particular at least substantially perpendicularly, to the output axis.Preferably, the driving jaws delimit the opening at least along the direction extending transversely, in particular at least substantially perpendicularly, to the output axis. Preferably, the clamping device is arranged at least partially along the direction extending transversely, in particular at least substantially perpendicularly, to the output axis between the at least two driving jaws of the driving device.

[0034] This allows the driving device to take on an additional function of guiding the clamping device, thus ensuring a compact design of the tool holding device.

[0035] In this context, "oriented towards / away" is understood to mean an orientation or alignment in a space, such as in a three-dimensional coordinate system, of a normal, which describes a vector that is perpendicular to a tangential plane to a reference point or a reference surface or a reference device.

[0036] Furthermore, it may be expedient for the driving device to have at least two driving jaws arranged parallel to and spaced from one another. The driving jaws are preferably connected to the output shaft in a rotationally fixed manner. The driving jaws can preferably be driven in rotation about the output axis, in particular together with the output shaft.

[0037] Preferably, the two driving jaws can be evenly distributed, in particular symmetrically, such as rotationally symmetrically, around the output axis. Preferably, the driving jaws are point-symmetrical relative to one another with respect to a point on the output axis. This allows for better distribution of acting forces. However, it is also conceivable for the driving jaws to be asymmetrical with respect to at least one point on the output axis, for the driving jaws to be mirror-symmetrical with respect to at least one plane encompassing the output axis, or the like.

[0038] It may be expedient for the clamping device to have at least one clamping surface for transmitting an axial force to the tool device. The clamping surface is preferably provided to fix the tool device at least axially to the tool holding device when the clamping device is in a fastened state, in particular as a result of a positive and / or non-positive connection. The clamping surface is preferably provided to exert a fixing force on the tool device in a direction running at least substantially parallel to the output axis when the clamping device is in a fastened state. The clamping surface can be flat. The clamping surface can be curved at least in some regions.

[0039] It is further proposed that the tool holder device have a flat support surface, in particular extending orthogonally to the output axis, which is intended to support the tool device in the axial direction. Preferably, the tool device, in particular with at least one contact surface of the tool device, rests against the support surface at least when the tool device is arranged on the tool holder device. The tool device can rest against the support surface in a fastened state. Preferably, the tool device can be pressed against the support surface by means of the clamping device, in particular when the clamping device is fastened. Furthermore, it can be expedient for the tool holder device to have the flat support surface which is arranged at a distance from the clamping device, in particular the clamping surface of the clamping device, in the radial direction of the output axis.In particular, the support surface can extend substantially orthogonally to the output axis. The support surface can form the second support surface of the second support area. This allows a flat support of the tool device on and / or at the tool holder device, whereby the tool holder can be operated reliably with the machine tool while maintaining a required flat tolerance of the tool device. This allows particularly high angular accuracies of the tool device relative to the tool holder device to be achieved, thus reducing vibrations and impermissible wobbling of the tool device during operation of the tool device with the machine tool.

[0040] The support surface can at least partially delimit the opening of the tool holding device in the radial direction of the output axis. Preferably, at least one sealing element of the tool holding device is arranged at the opening. The sealing element is preferably intended to form a seal against an inner wall of the output shaft designed as a hollow shaft, said inner wall delimiting the opening, as well as to form a seal against the driving device and / or the clamping device. Preferably, the sealing element is intended to at least largely prevent dirt from penetrating the tool holding device, in particular into the output shaft designed as a hollow shaft, through the opening. Preferably, the sealing element surrounds the tool holding device, in particular the driving device and / or the clamping device, at least partially, in particular completely, along a circumferential direction.The circumferential direction preferably runs in a plane extending at least substantially perpendicular to the output axis.

[0041] Furthermore, it may be expedient for the driving device to have a maximum radial extent along a direction running transversely, in particular at least substantially perpendicularly, to the output axis, which is greater than a maximum radial extent of the clamping device along a direction running transversely, in particular at least substantially perpendicularly, to the output axis in a fastening state of the clamping device. The maximum radial extent of the driving device is preferably designed as a diameter. The maximum radial extent of the driving device preferably has a value of in particular less than 35 mm, preferably less than 30 mm, and particularly preferably approximately 29 mm, in particular accurate to a manufacturing tolerance.The maximum radial extent of the clamping device in a fastening state preferably extends along a direction running transversely, in particular at least substantially perpendicularly, to the output axis and has a value of in particular less than 34 mm, preferably less than 29 mm and particularly preferably 28.5 mm, in particular accurate to a manufacturing tolerance. Preferably, the maximum radial extent of the clamping device in a fastening state of the clamping device is arranged within a maximum diameter of a circle around the output axis of 28.5 mm or preferably has a value of 28.5 mm. In particular, the clamping device can have a circumferential surface which delimits the clamping device, in particular the at least one hook device, at least in sections in the radial direction of the output axis.In a released state, the circumferential surface of the clamping device can protrude relative to the driving device in the axial direction of the output axis. In a released state, the circumferential surface of the clamping device can be angled relative to the output axis such that the distance of the circumferential surface relative to the output axis decreases or tapers in an axial direction of the output axis pointing away from the tool holder device or the machine tool. This allows the tool device to be pre-centered during a placement process on the tool holder device in order to place the tool device particularly advantageously on the machine tool.The circumferential surface of the clamping device can form an angle with the output axis in a released state which is greater than 5°, in particular greater than 10°, preferably greater than 15°, preferably greater than 20°, particularly preferably greater than 25°, and / or less than 60°, in particular less than 50°, preferably less than 40°, preferably less than 35°, particularly preferably less than 30°. The circumferential surface of the clamping device can be arranged parallel to the output axis in a fastened state. In particular, the maximum radial extent of the driving device can be greater than a maximum radial extent of the clamping device relative to the output axis. Preferably, the maximum radial extent of the driving device in the radial direction of the output axis is limited by a driving limiting circle.Preferably, the maximum radial extent of the clamping device in the radial direction of the output axis is limited by a clamping limiting circle. The driving limiting circle preferably has a maximum diameter that is larger, in particular by up to 5%, preferably by up to 3%, preferably by up to 1% larger, than a maximum diameter of the clamping limiting circle. These circles are designed to be concentric in at least one state, in particular around the output axis. As a result, the clamping device can be particularly advantageously protected from damage during operation of the machine tool with the tool device, for example in the event of a collision between the tool holder device and a workpiece to be machined.

[0042] The tool device is preferably centered over the maximum diameter of the driving device of 29 mm, in that the recess of the tool device preferably corresponds at least in sections approximately, in particular exactly to a manufacturing tolerance, to a maximum diameter of 29 mm, so that an exact tolerance is achieved and good concentricity is ensured.

[0043] Furthermore, it may be expedient for the clamping device to protrude further from the driving device in a released state of the tool holder in the axial direction of the output axis in a direction oriented away from the machine tool. In particular, the clamping device can protrude further from the driving device in a released state of the tool holder, in particular the clamping device, in the axial direction of the output axis in a direction oriented away from the machine tool than in a fastened state of the tool holder, in particular the clamping device.Preferably, the tool holder device, in particular the clamping device, can be designed in a released state of the tool holder device, in particular the clamping device, at least substantially conical in shape or can be arranged within a conical envelope that at least partially surrounds or limits the clamping device, in particular so that the tool device is first roughly centered by means of the clamping device during a placement process in the axial direction of the output axis and then finely centered by means of the driving device. A maximum radial extent of the clamping device in a released state can, in particular viewed along the axial direction, correspond at least in sections to a value of 22 mm, in particular correspond to a diameter of a circle running around the output axis of 22 mm, so that the inserted tool can be pre-centered.This allows the tool fixture to be placed on the driving device of the tool holder during a placement process in the axial direction of the output axis and to be pre-centered or roughly centered in the radial direction by the clamping device extending in the axial direction of the output axis. Centering is understood, in particular, to mean centering in the circumferential direction around the output axis.

[0044] Furthermore, it may be expedient for the torque transmission area of the driving device to have a, in particular straight or curved, output edge and / or a, in particular flat or curved, output surface. As a result, the output surface and / or the output edge can contact a torque absorption area of the tool device in a particularly advantageous manner, in particular in the form of a point contact, preferably in the form of a line contact, preferably in the form of a surface contact. The output surface can be oriented, in particular aligned, in the circumferential direction around the output axis.

[0045] Furthermore, it may be expedient for the at least one torque transmission region, in particular the output surface and / or the output edge, to be angled counter to a direction of rotation of the tool holder device during operation of the machine tool. Preferably, the output surface and / or the output edge, in particular in a plane extending at least substantially perpendicular to the output axis, form an angle of in particular less than 80°, preferably less than 60°, and particularly preferably less than 45° with a straight line intersecting the output axis and the output surface and / or the output edge at least at one point, in particular with the radial direction. This can reduce damage resulting from collisions with workpieces.

[0046] Furthermore, it may be expedient for the driving device to have at least two torque transmission regions, each with an output edge and / or an output surface, which are oriented away from one another, in particular with respect to a plane encompassing the output axis, and which are substantially parallel to one another. Preferably, the torque transmission regions, each with an output edge and / or an output surface, are arranged at a distance from one another along a circumferential direction extending around the output axis, wherein, in particular, a minimum distance between the torque transmission regions, in particular between the output edges and / or the output surfaces of the torque transmission regions, along the circumferential direction is in particular greater than 10%, preferably greater than 20%, and particularly preferably less than 60% of a total circumference of the clamping limiting circle.

[0047] It is further proposed that the output edge and / or the output surface be angled, in particular by up to 50°, preferably by up to 40°, more preferably by up to 30°, particularly preferably by up to 25°, relative to a plane spanned by an axial direction and a radial direction of the output axis in the circumferential direction around the output axis and / or around a radial direction of the output axis forming a radial axis. The output edge and / or the output surface preferably form an angle with a plane spanned by the output axis and a direction extending transversely, in particular at least substantially perpendicular to the output axis, which angle is in particular less than 50°, preferably less than 40°, more preferably less than 30°, and particularly preferably greater than 15°.With an angled arrangement of the output surface and / or the output edge relative to the plane spanned by the output axis and the transverse direction, in particular at least substantially perpendicular to the output axis, a maximum extension of the output surface and / or the output edge along a direction running at least substantially perpendicular to the output axis can be minimized without reducing a maximum transverse extension of the output surface itself, so that an extension of the driving device can be designed particularly compactly. With an angled arrangement of the output surface around the circumferential direction of the output axis, a radial extension of the output surface and / or the output edge can be minimized without reducing an extension of the output surface, so that an extension of the driving device can be designed particularly compactly.If the output surface is angled around a radial direction of the output axis forming a radial axis, the tool device can be placed in an axial direction on the tool holder device in a particularly simple manner, so that a maximum extension of the output surface in the axial direction of the output axis is increasingly designed towards the machine tool.

[0048] The output surfaces can be angled counter to a direction of rotation of the tool holder during operation of the machine tool. Preferably, the output surfaces are inclined relative to a circumferential direction extending around the output axis. In particular, the output surfaces each form an angle other than 90° with the circumferential direction.

[0049] It may be expedient for the tool holding device, in particular the clamping device, to have an actuating device which, upon axial actuation of the actuating device by means of an actuating force, is provided to transfer the clamping device from a release state, in which the tool device can be removed from the tool holding device, into a fastening state, in which the tool device is fastened to the tool holding device.

[0050] The actuating device can be actuated by means of the tool device in that the tool device is actuated by means of an actuating force in such a way that the tool device exerts an actuating force on the clamping device in the axial direction of the tool axis or the output axis in order to move the clamping device from a release state to a fastening state.

[0051] Preferably, the clamping device may have a clamping recess.

[0052] Furthermore, it may be expedient for the clamping device to have at least one hook device with at least one radial clamping recess, which is provided to clamp the tool device in a fastened state at least in the axial direction of the drive axis and to release it in a released state. The clamping recess can be provided to at least partially accommodate the tool device. The clamping recess can be provided to at least partially accommodate the tool device in a released state. The clamping recess can be provided to accommodate the tool device in a fastened state and to hold it on the tool holding device. In a released state, the clamping recess can protrude or protrude at least partially from the driving device in the axial direction along the output axis.In a released state, the clamping recess can protrude from the driving device such that the connection device of the tool device is received in the clamping recess. In a released state, the clamping recess can be angled relative to the output axis such that the connection device of the tool device can be received at least partially in the clamping recess, in particular in a form-fitting manner in the radial direction to the output axis. The clamping recess can be designed as a circumferential recess. The clamping recess can be designed such that in a released state, the clamping recess opens at least partially in the axial direction of the output axis in order to receive the tool device, in particular the connection device of the tool device.

[0053] In particular, the clamping device can have at least two hook devices, each with at least one radial clamping recess. The clamping recess can extend substantially in the radial direction of the output axis in the fastened state. Preferably, the tool device engages at least partially in the clamping recess, at least when the tool device is fastened to the tool receiving device by means of the clamping device. This makes it particularly easy to provide a positive connection between the tool device and the machine tool in a fastened state. In particular, the clamping device can have at least one clamping surface for transmitting an axial force to the tool device, in particular the connecting device of the tool device, in the fastened state.Preferably, the clamping surface contacts the tool device at least in sections in the form of a point contact, preferably in the form of a line contact, and particularly preferably in the form of a surface contact. The clamping surface can be flat or, in particular at least in sections, curved.

[0054] The contact area forming the point, line, or surface contact depends on the shape and type of the torque transmission / torque absorption areas and their interaction. In the case of a point contact area, this contact area has a circular or elliptical shape. A point contact area is particularly resistant to inaccurate positioning of the tooling relative to the machine tool, which can be caused by tolerances during the tooling's manufacturing.

[0055] In the case of a linear contact area, this contact area has a large extension along the contact line and a small extension perpendicular to this line. Compared to a point contact area, a linear contact area offers a larger contact area and greater driving forces can be transferred from the machine tool to the tooling. Compared to a linear contact area, a flat contact area offers a larger contact area, in particular a larger contact surface, and therefore greater driving forces can be transferred from the machine tool to the tooling. Compared to a point contact, linear and flat contact require greater precision, both in the manufacture of the torque transmission areas / torque absorption areas and in the positioning of the tooling on the machine tool.The torque transmission areas / torque absorption areas can be matched to one another in such a way that surface or linear contact only occurs when significant drive forces are transmitted, for example when the machine tool is operated at rated power.

[0056] The clamping surface can be flat or curved. The clamping surface can be formed in a substantially radial clamping recess. The clamping recess can be designed, in particular, as a clamping trough or as a clamping depression. The clamping surface extends substantially in the radial direction of the output axis. The clamping surface can be oriented toward the machine tool. When the tool holder is mounted, the clamping surface can be oriented transversely, in particular at least substantially perpendicularly, to the output axis.

[0057] Furthermore, it may be expedient for the clamping device, in particular at least one hook device of the clamping device, to be pivotably mounted about a clamping device rotation axis, in particular arranged substantially orthogonally with respect to the output axis, such that tool devices of different thicknesses of the connecting devices can be clamped by means of the clamping device depending on a pivot angle of the clamping device, in particular a clamping surface of the clamping device, which is angled with respect to the output axis. This also allows tool devices with connecting devices to be accommodated, the thickness or material thickness of which can be designed differently in the axial direction depending on the area of application and the requirements of the tool device.

[0058] Furthermore, it is proposed that the driving device comprise at least one assembly coding element, which is intended to interact with a tool assembly coding element of the tool device when the tool device is arranged on the tool receiving device. Preferably, the at least one assembly coding element of the driving device is intended to code an arrangement or placement of the tool device on or on the tool receiving device, in particular the support surface. Preferably, the at least one assembly coding element of the driving device is intended to code an arrangement or placement of the tool device on or on the tool receiving device, in particular the support surface, according to a key-keyhole principle.Preferably, the at least one assembly coding element of the driving device is formed integrally with the driving device, in particular with a driving jaw of the driving device. However, it is also conceivable for the at least one assembly coding element of the driving device to be formed separately from the driving device, in particular with the driving jaw, and to be fixed to the driving device, in particular with the driving jaw, by means of a connection that would be deemed appropriate by a person skilled in the art. Preferably, the assembly coding element is formed as a mechanical assembly coding element, such as a recess, an extension, a groove, a web, or the like. However, it is also conceivable for the assembly coding element to be formed as an electronic assembly coding element, such as an RFID chip, an NFC chip, a radio wave evaluation device, an electronic reading device (barcode reader, data matrix code reader, etc.) or the like.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 of the tool device is preferably designed to correspond to the assembly coding element of the driving device. If the assembly coding element is designed as a mechanical assembly coding element, the tool assembly coding element is likewise designed as a mechanical tool assembly coding element, such as, for example, a recess, an extension, a groove, a web, or the like. If the assembly coding element is designed as an electronic assembly coding element, the tool assembly coding element is likewise designed as an electronic tool assembly coding element, such as, for example, an RFID chip, an NFC chip, a radio wave evaluation device, an electronic reading device (barcode reader, data matrix code reader, etc.) or the like.Further corresponding embodiments of the assembly coding element and the tool assembly coding element that would appear expedient to a person skilled in the art are also conceivable. The tool holding device preferably comprises a plurality of assembly coding elements, in particular at least two, preferably at least three, and very preferably at least four. The tool device preferably comprises an equal number depending on the number of assembly coding elements of the tool holding device. However, it is also conceivable for the tool device to have a number of tool assembly coding elements that differs from, and in particular is greater than, the number of assembly coding elements of the tool holding device. Preferably, the at least one assembly coding element of the driving device 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 assembly coding element of the driving device is provided to code an axial placement possibility of the tool device on the driving device. By means of the embodiment according to the invention, incorrect assembly of the tool device on the tool holding device can advantageously be largely avoided. It can advantageously counteract the arrangement of tool devices on the tool holding device that are unsuitable for safe operation of the machine tool. For example, it can advantageously counteract the arrangement of a tool device that is intended for machine tools with a low maximum speed on a machine tool with a high maximum speed. Furthermore, it is proposed that the assembly coding element of the driving device be arranged on at least one driving jaw of the driving device.The assembly coding element arranged on the at least one driving jaw of the driving device is preferably designed as an extension. The assembly coding element of the driving device, designed as an extension, preferably has a main orientation which is directed away from the output axis, in particular along a direction running transversely, in particular at least substantially perpendicular to the output axis. However, it is also conceivable for the assembly coding element arranged on the at least one driving jaw of the driving device to have a different configuration that would appear expedient to a person skilled in the art. The assembly coding element arranged on the at least one driving jaw of the driving device is preferably arranged on an outer surface of the at least one driving jaw, in particular facing away from the output axis.Preferably, the assembly coding element arranged on the at least one driving jaw of the driving device is arranged on an outer surface of the at least one driving jaw that runs at least substantially parallel to the output axis. Alternatively or additionally, it is conceivable for the tool holding device to comprise at least one assembly coding element arranged on the support surface of the tool holding device. The assembly coding element arranged on the support surface of the tool holding device can be designed as a mechanical or electronic assembly coding element. By means of the configuration according to the invention, the arrangement, in particular the placement, of an unsuitable tool device on, in particular onto, the tool holding device can be reliably and advantageously largely avoided. A structurally simple design of an assembly coding can be enabled.

[0059] It is also proposed that the assembly coding element of the driving device be arranged adjacent to an inner circumferential surface of the at least one driving jaw. Preferably, the assembly coding element arranged on the at least one driving jaw of the driving device is arranged directly adjacent to the inner circumferential surface. Alternatively or additionally, it is conceivable that the assembly coding element arranged on the at least one driving jaw of the driving device is arranged on an outer circumferential surface of the at least one driving jaw. Preferably, a surface of the assembly coding element arranged on the at least one driving jaw of the driving device forms part of the inner circumferential surface or the outer circumferential surface of the at least one driving jaw. By means of the configuration according to the invention, a structurally simple design of an assembly coding can be enabled.It is advantageously possible to reliably and largely avoid the arrangement, in particular the placement, of an unsuitable tool device on, in particular onto, the tool holding device.

[0060] Furthermore, it is proposed that the clamping device, in particular the at least one hook device of the clamping device, comprises at least one assembly coding element. The clamping device preferably comprises a plurality of assembly coding elements, in particular at least two. However, it is also conceivable for the clamping device to have a number of assembly coding elements that differs from one or two and is arranged on the hook device. Preferably, the at least one assembly coding element of the clamping device forms a fixing coding element that is provided to encode a fastening of the tool device to the tool holder device. Preferably, the at least one assembly coding element of the clamping device is provided to encode a fastening of the tool device to the tool holder device according to a key-keyhole principle. The assembly coding element of the clamping device is preferably provided toIn the absence of a corresponding assembly coding element on a tool device, fastening of the tool device to the tool holder device, in particular to the support surface, by means of the clamping device is to be avoided or prevented at least as far as possible. If a corresponding assembly coding element is present on a tool device, fastening is preferably possible as a result of a coding release through the interaction of the assembly coding element of the clamping device with the corresponding assembly coding element of the tool device. It is conceivable that the tool holder device only has at least the assembly coding element(s) of the driving device or only at least the assembly coding element(s) of the clamping device. It is also conceivable,that the tool holding device alternatively or in addition to the assembly coding element(s) of the driving device or the assembly coding element(s) of the clamping device has further coding elements which enable coding of an arrangement of the tool device on the tool holding device, such as at least one coding element which is movable as a result of an arrangement of the tool device on the tool holding device in order to release an arrangement of the tool device, at least one additional static coding element on the tool holding device which, for example, engages in a recess on the tool device, at least one additional movably mounted coding element which is preferably movable into a coding recess of the tool device after a correct arrangement of a suitable tool device, for example to release commissioning of the machine tool or further,Coding elements that appear sensible to a person skilled in the art. Preferably, the at least one assembly coding element of the clamping device is designed as a radial coding element, in particular as a radial coding element acting along a direction running at least substantially perpendicular to the output axis. Preferably, the at least one assembly coding element of the clamping device is provided to code a radially acting fastening of the clamping device to a fastening of the tool device to the tool holding device. By means of the configuration according to the invention, a fastening of a tool device can advantageously be coded by means of the clamping device. For example, in the case of an unsuitable configuration of a tool device that is designed decoupled from the element corresponding to the at least one assembly coding element of the clamping device,A locking mechanism can be provided. This reliably prevents the attachment of unsuitable tools to the tool holder.

[0061] It is further proposed that the assembly coding element of the clamping device is arranged on a hook jaw, in particular in a clamping recess of the hook jaw. Preferably, the at least one assembly coding element of the clamping device is formed integrally with the hook jaw. However, it is also conceivable that the at least one assembly coding element of the clamping device is formed separately from the hook jaw and is fixed to the hook jaw by means of a connection that appears expedient to a person skilled in the art. Preferably, the assembly coding element of the clamping device is arranged on a clamping surface of the clamping device, in particular directly adjacent to the clamping surface that at least partially delimits the clamping recess. Preferably, the at least one assembly coding element of the clamping device is formed as an extension.However, it is also conceivable for the at least one assembly coding element of the clamping device to have a different configuration that would appear expedient to a person skilled in the art. The at least one assembly coding element of the clamping device can be arranged symmetrically or asymmetrically to a center plane, in particular a plane of symmetry, of the hook jaw on the hook jaw. Preferably, the center plane, in particular the plane of symmetry, of the hook jaw runs at least substantially parallel to the output axis and / or encompasses it. It is also conceivable for the at least one assembly coding element of the clamping device to be arranged on the hook jaw at a distance from the center plane, in particular the plane of symmetry, of the hook jaw. By means of the configuration according to the invention, a compact design can advantageously be realized.Advantageously, reliable protection of the assembly coding element of the clamping device against damage can be enabled, in particular by arranging the at least one assembly coding element in the clamping recess of the hook jaw.

[0062] In addition, a machine tool system comprising at least one machine tool according to the invention with a tool holding device and a tool device that can be received in the tool holding device is proposed, wherein the tool holding device holds the tool device on the machine tool in such a way that the output axis of the machine tool and a tool rotation axis substantially coincide, in particular are coaxial.

[0063] In particular, the at least one driving device can have at least one torque transmission region for transmitting a torque in the circumferential direction around the output axis to the tool device.

[0064] The tool device can preferably have a tool rotation axis and a connecting device with a recess which is intended to at least partially, in particular completely, encompass the tool holding device of the hand-held power tool in the circumferential direction of the output axis. Preferably, at least the driving device and / or the clamping device of the tool holding device engage / engages at least partially in the recess of the connecting device of the tool device when arranged on the tool holding device. The driving device is preferably intended to bear at least partially against an edge region of the tool device delimiting the recess of the connecting device of the tool device, in particular when the tool device is arranged on the tool holding device.

[0065] Preferably, the tool device can have at least one torque absorption area which is radially spaced from the tool rotation axis.

[0066] Further preferably, the torque absorption region can at least partially delimit the recess in the radial direction of the tool rotation axis. Preferably, the torque absorption region of the tool device delimits at least partially, in particular completely, the recess of the connection device of the tool device.

[0067] Furthermore, the driving device and the clamping device can preferably be provided to reach through the recess of the tool device and to clamp the tool device to the tool receiving device by means of the clamping device which is movable substantially in the radial direction of the output axis.

[0068] Particularly preferably, the clamping device can exert a force on the tool device in the region of the clamping surface, wherein this force has at least one component in the axial direction of the tool rotation axis.

[0069] Preferably, the clamping device can be designed in such a way that it prevents an unintentional release of the tool device from the tool holding device and enables an easy change of the tool device.

[0070] Furthermore, it may be expedient for the connection device to extend in the axial direction between a first connection surface and a second connection surface of the tool device facing away from the first connection surface.

[0071] In particular, the connection surfaces of the tool device are arranged orthogonally to the tool rotation axis.

[0072] Preferably, a distance between the connection surfaces running at least substantially parallel to the tool rotation axis forms a material thickness t of the connection device.

[0073] Preferably, the at least one torque-absorbing region is arranged between the connecting surfaces of the tool device. Preferably, a drive surface of the torque-absorbing region, which delimits the recess, is arranged between the connecting surfaces of the tool device. Preferably, the drive surface of the torque-absorbing region is aligned at least substantially parallel to the tool rotation axis. However, it is also conceivable for the drive surface of the torque-transmitting region to be arranged at an angle relative to the tool rotation axis.

[0074] The first connection surface can define the connection device on a side facing the machine tool in the direction of the output axis. The connection surfaces can be flat.

[0075] A particularly compact design of the tool device in the axial direction can be made possible.

[0076] Furthermore, it may be expedient for the connection device of the tool device to have at least two, in particular at least four, torque absorption regions arranged rotationally symmetrically to one another around the tool rotation axis. In particular, the tool receiving device has at least two, in particular at least four, torque transmission regions arranged rotationally symmetrically to one another around the drive axis. In particular, the torque absorption regions are configured to correspond, in particular to be opposite, to the torque transmission regions, so that, in particular, a negative mold is formed.

[0077] The torque transmission areas are arranged symmetrically in the circumferential direction around the output axis A at an angle of 90° to one another, so that the tool device has four rotational positions with which it can be connected to the driving device. This advantageously results in good operability. Preferably, the torque transmission areas are arranged in an n-fold, in particular at least a four-fold, rotational symmetry around the output axis. However, it is also conceivable for the torque transmission areas to be arranged in another n-fold rotational symmetry that would be deemed appropriate by a person skilled in the art, such as a two-fold, three-fold, five-fold, or similar rotational symmetry around the output axis.

[0078] Furthermore, it may be expedient for the torque absorption region to extend in the radial direction of the drive axis at least in sections between a first and a second radial distance from the tool rotation axis and for at least one of these sections to be configured for torque transmission from the machine tool to the tool device.

[0079] Torques generated by the machine tool can be transmitted to the tool device via the tool holder device in a particularly advantageous manner.

[0080] It is proposed that the tool holding device has a flat, in particular circular, support surface which is intended to support at least one contact surface and / or the first connection surface of the tool device in the axial direction, so that the support surface extends in the radial direction of the tool rotation axis between a radial inner distance and a radial outer distance from the output axis.

[0081] The radial inner distance can form an inner radius of the bearing surface that defines the bearing surface. The radial outer distance can form an outer radius of the bearing surface that defines the bearing surface.

[0082] Preferably, the connection device of the tool device has at least one clamping wing which at least partially delimits the recess in the radial direction and which is essentially delimited in the radial direction to the tool rotation axis by a first delimiting edge which lies on a first, in particular minimal, delimiting circle around the tool rotation axis.

[0083] Preferably, the clamping wing, in particular the first boundary edge of the clamping wing, of the tool device, in a fastening state of the tool device with the machine tool, protrudes from the radial inner distance of the support surface in the radial direction to the output axis, in particular by up to 2 mm, preferably by up to 1 mm, preferably by up to 0.6 mm, particularly preferably by up to 0.1 mm, and / or in particular at least 0.5 mm, preferably at least 0.9 mm, preferably at least 1 mm, so that in this area there is no support material to support the clamping wing.

[0084] The clamping wing should not rest on the support surface in the radial direction, in particular not over its entire surface, so that the clamping wing can be elastically bent at least partially in the axial direction. The clamping wing preferably has a maximum reference value D corresponding to a spring rate of less than 400,000 N / mm. The clamping wing preferably has a maximum reference value D corresponding to a spring rate with a value from a range of 10,000 N / mm to 350,000 N / mm. The maximum reference value D of the clamping wing corresponding to a spring rate preferably results from the following relationship: F = Dz, where D = 3 EI L 3 , z = FL 3 3 EI , I = bh 3 12 with L as the, in particular averaged, maximum extent of the clamping wing between the first limiting circle and the second limiting circle, with b as the maximum tangential extent of the clamping wing along the second limiting circle and with h as the maximum material thickness of the clamping wing along the axial direction of the tool rotation axis a. The maximum material thickness h can preferably correspond to a value from a value range of 0.5 mm to 1.6 mm. Preferably, the clamping wing is arranged at a distance relative to the support surface at least in sections along a direction running at least substantially parallel to the output axis, in particular when the tool device is arranged on the tool holding device and is not yet secured by the clamping device.In particular, in the axial direction, in particular along the output axis in the direction of the machine tool, no support surface is provided below the first boundary edge of the clamping wing.

[0085] It is further proposed that the at least one torque transmission region of the tool holder device lies between a first orthogonal plane, in particular forming a support surface, and a second orthogonal plane of the tool holder device, in particular delimiting the driving device in the axial direction, in particular is arranged when the tool device is fastened to the machine tool.

[0086] The opening of the tool-holding device can be provided to accommodate, in particular at least partially, a clamping wing of the tool device, which clamping wing covers the opening, in particular at least partially, and to enable movement of the clamping wing in the axial direction of the output axis, in particular along the output axis as viewed in the direction of the machine tool. This can advantageously enable elastic deformation of the at least one clamping wing in the axial direction of the output axis, oriented toward the machine tool.

[0087] The first and second orthogonal planes are spaced apart by a distance T. The distance T is preferably in a ratio of up to 500%, in particular up to 350%, preferably up to 200%, preferably up to 150%, particularly preferably up to 100%, to the material thickness t of the connecting device of the tool device, which is limited by a maximum axial extent of the torque absorption areas. The tool device can be particularly advantageously connected to the driving device, in particular centered on the driving device.

[0088] It is further proposed that the tool device has a working area which is designed to act on a workpiece or a workpiece arrangement.

[0089] In particular, the working area can be arranged on the connecting device in such a way that the working area, in a fastening state, protrudes relative to the connecting device along the tool rotation axis in a direction oriented towards the tool holding device of the machine tool.

[0090] The working area can preferably have a contact surface which, when the tool device is fastened to the support surface of the machine tool, forms a circumferentially non-positive support for the machine tool. It is conceivable for the working area to be flexible. The working area can preferably be made of a different material from the connecting device, with the material of the working area preferably being more elastic than the material of the connecting device. In particular, the tool device can be clamped to the working area in the axial direction. This allows the working area to dampen vibrations of the tool device.

[0091] Furthermore, it may be expedient for the connecting device to have at least two clamping wings which are each delimited substantially in the radial direction to the tool rotation axis by a first limiting edge forming an extension of the clamping wing in the circumferential direction of the tool rotation axis, which first limiting edge lies on a, in particular minimal, first limiting circle around the tool rotation axis.

[0092] The first boundary edge can be formed from a plurality of boundary edge sections. The boundary edge sections can lie substantially on the first boundary circle and limit a minimum radial extent of the clamping wing. The boundary edge can have a boundary edge section in which the tool mounting coding element is arranged. Each clamping wing can have a first boundary edge.

[0093] In particular, the clamping device, in particular at least one hook device of the clamping device, can have a circumferential surface which limits a radial extension of the clamping device.

[0094] Preferably, a distance between at least two mutually adjacent first boundary edges in the circumferential direction of the tool rotation axis can be smaller than a distance of a, in particular minimal, extension of the circumferential surface of the clamping device in the circumferential direction.

[0095] This allows the tool device to be roughly centered or pre-centered particularly advantageously during a setting-up process.

[0096] Furthermore, it may be expedient for one torque transmission region, preferably several, particularly preferably all torque transmission regions of the machine tool to contact the torque absorption regions of the tool device at least in sections in the form of a point contact, preferably in the form of a linear contact, and particularly preferably in the form of a surface contact. This allows the at least one torque transmission region to contact the tool device particularly advantageously.

[0097] In addition, a tool device is proposed with a working area which is designed to act on a workpiece or a workpiece arrangement, and with a connecting device which is designed to absorb drive forces, and with a connecting area which connects the working area and the connecting device and which is designed to transmit drive forces of the machine tool from the connecting device to the working area by means of the connecting area, for use with a machine tool.

[0098] Furthermore, it is proposed that the tool device have at least one tool assembly coding element which is intended to interact with at least one assembly coding element of the tool holder device when the tool device is arranged on the tool holder device. The tool assembly coding element of the tool device is preferably designed as a mechanical tool assembly coding element, such as a recess, an extension, a groove, a web, an embossing, or the like. However, it is also conceivable for the tool assembly coding element of the tool device to be designed as an electronic tool assembly coding element, such as an RFID chip, an NFC chip, a radio wave evaluation device, an electronic reading device (barcode reader, data matrix code reader, etc.) or the like.or that the tool assembly coding element of the tool device is designed as a combination of a mechanical and an electronic tool assembly coding element. Preferably, the tool assembly coding element of the tool device is provided to interact according to a key-keyhole principle with at least one assembly coding element of the driving device or with at least one assembly coding element of the clamping device, in particular when the tool device is arranged on the tool holding device. Preferably, the tool device comprises a plurality of tool assembly coding elements, in particular at least two, preferably at least three, and very preferably at least four. The tool device preferably comprises an equal number depending on the number of assembly coding elements of the tool holding device.However, it is also conceivable for the tool device to have a number of tool assembly coding elements that differs from, and in particular is greater than, the number of assembly coding elements of the tool holder device. The at least one tool assembly coding element of the tool device can preferably be designed or act as a stress relief notch, in particular in addition to an assembly coding function. For assembly and / or fastening of the tool device to the tool holder device, a mechanical and / or electronic evaluation of the at least one tool assembly coding element of the tool device is preferably provided, in particular by means of the at least one assembly coding element of the tool holder device, in order to preferably enable assembly and / or fastening of the tool device to the tool holder device.It is conceivable that movement of the clamping device can be blocked, in particular mechanically and / or electronically, until assembly and / or fastening is released. It is conceivable that the at least one tool assembly coding element of the tool device is provided for actuating, in particular for moving, the at least one assembly coding element of the tool receiving device, in particular to enable assembly and / or fastening of the tool device to the tool receiving device.Alternatively or additionally, it is conceivable for the tool device to have at least one further tool assembly coding element, in particular an embossing, which is intended to actuate, in particular to move, at least one further assembly coding element of the tool holder device, which is in particular movably mounted, in particular on the support surface, in order to enable release of assembly and / or fastening of the tool device to the tool holder device. By means of the configuration according to the invention, incorrect assembly of the tool device on the tool holder device can advantageously be largely avoided. The arrangement of tool devices on the tool holder device that are unsuitable for safe operation of the machine tool can advantageously be counteracted.For example, it is advantageous to counteract the arrangement of a tool device intended for machine tools with a low maximum speed on a machine tool with a high maximum speed. This can advantageously achieve a high level of operator safety.

[0099] It is further proposed that the at least one tool assembly coding element be arranged on at least one clamping wing of the connecting device. If the tool assembly coding element arranged on the clamping wing is designed as a recess, the tool assembly coding element is preferably introduced into the clamping wing in such a way that the resistance of the clamping wing to plastic deformation as a result of operational loading is reduced to a maximum load limit of the clamping wing. It is conceivable that at least one stiffening element, such as a stiffening rib or the like, is arranged on the clamping wing. The at least one tool assembly coding element arranged on the clamping wing is preferably intended to interact with the at least one assembly coding element of the clamping device arranged on the hook jaw when the tool device is arranged on the tool receiving device.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.

[0100] It is also proposed that the at least one tool assembly coding element has a maximum extension along a radial axis that corresponds at most to a maximum distance between a first limiting circle and a second limiting circle of the connection device. Preferably, the at least one tool assembly coding element arranged on the clamping wing has a maximum extension along a direction extending transversely, in particular at least substantially perpendicularly, to the tool rotation axis, in particular a radial axis of the tool device, that is equal to or smaller than a maximum distance between a first limiting circle and a second limiting circle of the tool device. By means of the configuration according to the invention, reliable and secure coding can advantageously be achieved.

[0101] Furthermore, it is proposed that the at least one tool assembly coding element be arranged in an angular range between a drive edge and a coding edge of the connecting device on a clamping wing of the connecting device. In particular, the angular range has a maximum extent of less than 90°, preferably less than 60°, and particularly preferably less than 40°. By means of the configuration according to the invention, secure fastening coding can advantageously be achieved. Fastening of the tool device to unsuitable machine tools can advantageously be avoided to the greatest extent possible. Injuries to an operator resulting from fastening the tool device to unsuitable machine tools can advantageously be prevented.

[0102] In addition, the use of a tool device with a machine tool designed as an angle grinder is proposed, so that the tool device can be operated at a rotational speed of more than 4,000 or more than 10,000 or more than 20,000 revolutions per minute around the output axis.

[0103] In this context, "operable" should be understood as reliably operable, so that the use of a tool device with a machine tool, in particular an angle grinder, corresponds to an identical or at least approximately similar usage time or service life of the tool device as, for example, a ferrite grinding wheel used with an angle grinder. In particular, the usage time or service life should be understood as the service life of an abrasive driven by an angle grinder, which is typical in the field of grinding tools.

[0104] It is further proposed that the tool device have a working area for machining a workpiece, which is connected, in particular, by a material fit and / or form fit, to a support flange of the tool device. This allows a particularly advantageous separation of functions to be achieved.

[0105] The machine tool according to the invention, the machine tool system according to the invention, and / or the tool device according to the invention should not be limited to the application and embodiment described above. In particular, in order to fulfill a function described herein, the machine tool according to the invention, the machine tool system according to the invention, and / or the tool device according to the invention can have a number of individual elements, components, units, and method steps that differs from the number stated herein, within the scope of protection defined by the claims. Furthermore, in the value ranges specified in this disclosure, values within the stated limits are also to be considered disclosed and can be used as desired. Drawings

[0106] Further advantages will become apparent from the following description of the drawings. The drawings illustrate exemplary embodiments of the invention. The drawings, the description, and the claims contain numerous features in combination. Those skilled in the art will also conveniently consider the features individually and combine them into useful further combinations. Here: Fig. 1 shows a section through the tool holder device according to the invention of a hand-held power tool with a tool device, Fig. 2 shows a further section through the tool holder device with a tool device in a fastening state, Fig. 3 shows a further section through the tool holder device in a release state, Fig. 4 shows a view of the tool holder device from Figure 1 , Fig. 5a a view of a part of the tool holder device from Figure 4, Fig. 5b a view of a part of a first alternative tool holder, Fig. 5c a view of a part of a second alternative tool holder, Fig. 5d a view of a part of a third alternative tool holder, Fig. 5e a view of a part of a fourth alternative tool holder, Fig. 6 a perspective view of the tool holder from Figure 3 , Fig. 7 a perspective view of the tool holder device from Figure 2 Fig. 8 shows a further perspective view of the tool holder device, Fig. 9 shows a further perspective view of the tool holder device with a tool device, Fig. 10 shows a further perspective view of the tool holder device with a further tool device, Fig. 11 shows a view of an exemplary tool device and Fig. 12 shows a view of the tool holder device from Figure 1recorded tool setup from Figure 11 , Fig. 13 a sectional view of the tool holder device along a first orthogonal plane from Figure 1 , Fig. 14 a support flange of an embodiment of a tool device, Fig. 15 an enlarged view of a clamping wing of the support flange from Figure 11 , Fig. 16a an embodiment of a tool device and / or a tool holding device with at least one spring-loaded securing and / or positioning element, Fig. 16 legs for Figure 16aalternative embodiment of the tool device and / or the tool holding device with at least one spring-loaded securing and / or positioning element, Fig. 17 a detailed view of a hook jaw of the tool holding device with an assembly coding element of a clamping device of the tool holding device arranged thereon and Fig. 18 a tabular list of possible arrangements and embodiments of tool assembly coding elements of the tool device. Description of the embodiments

[0107] In the following figures, identical components are provided with the same reference numerals.

[0108] Figure 1shows a machine tool system or a machining system with a tool holder device 213 which is rotatably movable about an output axis A and a tool device 11. The tool holder device 213 is designed to hold a tool device 11 on the machine tool 211 in such a way that the output axis A and a fictitious, geometric tool rotation axis a essentially coincide. Tool setup:

[0109] How Figure 1 , Figure 2 and Figures 9 to 12As shown, the tool device 11 can be flat and at least substantially disc-shaped. The tool device 11 has a fictitious tool rotation axis a and a connecting device 113 for connecting the tool device 11 to a tool receiving device 213 of the machine tool 211 and a working area 15. The connecting device 113 and the working area 15 are preferably formed integrally with one another, in particular, are integrally connected to one another.

[0110] The tool rotation axis a defines a center point of the tool device 11, around which the tool device 11 rotates during operation with a machine tool 211. The connecting device 113 is arranged in a radially inner region of the tool device 11 around the tool rotation axis a.

[0111] The connecting device 113 has a recess 17 forming a material opening through the tool device 11, which extends in the axial direction of the tool rotation axis a through an entire material thickness t of the connecting device 113. The recess 17 can be provided to completely encompass a driving device 215 and a clamping device 217 of the tool holding device 213. The recess 17 completely surrounds the tool rotation axis a in at least one plane, such as, for example, an orthogonal plane extending orthogonally to the tool rotation axis a.

[0112] The connecting device 113 can be fastened to the tool receiving device 213 in such a way that an output axis A of a drive shaft and the tool rotation axis a of the tool device 11 substantially coincide.

[0113] The connecting device 113 further comprises four clamping wings 19 which extend in the radial direction towards the tool rotation axis a and at least partially delimit the recess 17 of the connecting device 113 in the radial direction, as shown in Figures 11 and 12 can be seen. The clamping wings 19 are delimited, in particular, essentially in the radial direction to the tool rotation axis a by a first limiting edge 21, which lies on a first, in particular minimal, limiting circle 23 around the tool rotation axis a. Alternatively, however, the connecting device 113 can also have fewer than four clamping wings 19, such as two clamping wings 19, or more than four clamping wings 19, such as six clamping wings 19.

[0114] The clamping wings 19 are delimited, in particular substantially, in the radial direction and / or in the circumferential direction of the tool rotation axis a by a second delimiting edge 25 each, which lies on a second, in particular maximum, delimiting circle 27 around the tool rotation axis a. In particular, a diameter of the first delimiting circle 23 is smaller than a diameter of the second delimiting circle 27. Preferably, the first delimiting edges 25 and the second delimiting edges 25 delimit the recess 17 at least in sections in the radial direction of the tool rotation axis a. The first delimiting circle 23 is arranged concentrically to the second delimiting circle 27 around the tool rotation axis a. The first diameter of the first delimiting edge 23 is approximately 22 mm, whereby the tool device 11 also fits conventional machine tools, in particular angle grinders, thus ensuring backward compatibility.Alternatively, the first diameter of the first boundary edge 23 can also be smaller than 22 mm, so that the tool device also fits on conventional machine tools, in particular angle grinders, of smaller dimensions.

[0115] The second boundary edge 25 can be configured to center and support the tool device 11 in the radial direction.

[0116] The first boundary edge 21 can be curved around the tool rotation axis a according to a circular arc of the boundary circle 23. The second boundary edge 25 can be curved around the tool rotation axis a according to a circular arc of the boundary circle 27.

[0117] The connection device 113 has a torque absorption region 40. The torque absorption region 40 has a drive edge 40a, in particular a straight or curved one, and / or a drive surface 40b, in particular a flat or curved one. As a result, the torque absorption region 40 of the tool device 11 can contact a torque transmission region 219 of the tool holder device 213, in particular in the form of a point contact, preferably in the form of a line contact, preferably in the form of a surface contact. The torque transmission region 219 is arranged at a distance from the tool rotation axis a.

[0118] The torque absorption region 40 of the connection device 113 is intended to transmit drive forces from the machine tool 211 to the tool device 11. The torque absorption region 40 is arranged in the axial direction of the tool rotation axis a between the recess 17 of the tool device 11, which extends through the entire material thickness of the tool device 11. The recess 17 has at least four torque absorption regions 40, which are arranged rotationally symmetrically to one another about the tool rotation axis a, in particular with an n-fold rotational symmetry. However, it is also conceivable for the tool device to have a number of torque absorption regions 40 other than four, such as two, three, or more than four torque absorption regions 40.

[0119] The drive surface 40b, in particular a drive surface region of the drive surface 40b, is intended to provide a positive and / or non-positive connection with the tool holder device 213 of the machine tool 211, in particular to enable the tool device 11 to be operated in a rotational manner. The drive surface 40b is delimited in the axial direction of the tool rotation axis a by at least the drive edge 40a. At least the drive surface region of the drive surface 40b is flat.

[0120] The drive surface 40b is angled to a radial direction forming a radial axis r to the tool rotation axis a, in particular at an angle of up to 30°, such as 25°, as shown in the Figures 11 and 12 can be seen.

[0121] The connection device 113 has a first connection surface 49 and a second connection surface 50 facing away from the first connection surface 49. These connection surfaces 49, 50 are arranged orthogonally to the tool rotation axis a and preferably define a material thickness t of the connection device 113. The at least one torque absorption region 40 extends between the connection surfaces 49, 50.

[0122] The first boundary edge 21 is delimited in the circumferential direction around the tool rotation axis a by a coding edge 35, in particular a coding edge region of the coding edge 35, and a drive edge 40a, in particular a drive edge region of the drive edge 40a, as shown for example in Figure 11 or Figure 12can be seen. At least the drive edge region of the drive edge 40a is linear. At least the coding edge region of the coding edge 35 is linear. At least the coding edge 35 is substantially curved.

[0123] The coding edge 35 connects the first boundary edge 21 to the second boundary edge 25. The drive edge 40a connects the first boundary circle 21 to an adjacent second boundary edge 25. The coding edge 35 and the drive edge 40a extend in an orthogonal plane transverse to the tool rotation axis a, in particular substantially in the radial direction. In particular, the orthogonal plane extends substantially orthogonal to the tool rotation axis a.

[0124] The first boundary circle 23 has at least one fictitious projection edge 22 located between two circumferentially adjacent first boundary edges 21, which lies on the first boundary circle 23 and runs in the circumferential direction around the tool rotation axis a concentric with the first boundary circle 23. An extension in the circumferential direction of the at least one first boundary edge 21 lying on the first boundary circle 23 is up to 10% greater than an extension of the adjacent fictitious projection edge 22 lying on the first boundary circle 23. Preferably, one, in particular each, projection edge 22 is smaller than a first boundary edge 21 adjacent to the projection edge 22. This allows particularly advantageous centering, in particular pre-centering or rough centering, of the tool device 11 to be achieved.

[0125] The clamping wings 19 can in particular be limited essentially in the radial direction to the tool rotation axis a by a second limiting edge 25 each, which lies on a second, in particular maximum, limiting circle 27 around the tool rotation axis a.

[0126] The boundary edges 21, 25, the coding edges 35 and the drive edges 40a form a boundary contour of the recess 17. In particular, the first boundary edge 21, the coding edge 35 and the drive edge 40a form a contour of the clamping wing 19. The drive edge 40a and the coding edge 35 limit the first boundary edge 21 in the circumferential direction around the tool rotation axis a and adjoin the first boundary edge 21.

[0127] The clamping wings 19 are arranged symmetrically in the circumferential direction around the tool rotation axis a. The clamping wings 19 are arranged offset by 90° from one another in the circumferential direction around the tool rotation axis a, resulting in four rotational positions for a complete 360° rotation of the tool device 11 around the tool rotation axis a. Alternatively, the clamping wings 19 can be arranged offset by 180° or 60° from one another in the circumferential direction around the tool rotation axis a, resulting in two or six rotational positions for a complete 360° rotation of the tool device 11 around the tool rotation axis a.

[0128] The clamping wings 19 extend at least substantially along an orthogonal plane extending in the radial direction of the tool rotation axis a. In particular, the orthogonal plane extends substantially orthogonal to the tool rotation axis a.

[0129] In particular, the boundary contour of the recess 17 has, at least in sections, a coding designed as the coding edge 35a, which is designed symmetrically about the tool rotation axis a. The boundary contour can advantageously be designed asymmetrically about the tool rotation axis, in particular not axially symmetrically. In an advantageous embodiment according to Figures 11 and 12 the boundary contour can be designed symmetrically around the tool rotation axis a, in particular according to an n-fold rotational symmetry.

[0130] In a Figure 11 and Figure 12In the embodiment shown, the clamping wing 19 extends at least substantially along a plane orthogonal to the tool rotation axis a and is symmetrical, in particular axially symmetrical, with respect to a radial direction of the tool rotation axis a forming a radial axis r in a plane spanned by a radial and an axial direction of the tool rotation axis a.

[0131] In an alternative embodiment, the clamping wing 19 can be symmetrical, in particular mirror-symmetrical, with respect to a plane of symmetry spanned by a radial and an axial direction of the tool rotation axis a.

[0132] In an embodiment not shown in detail, the clamping wing 19 extends at least substantially along a plane orthogonal to the tool rotation axis a and is asymmetrical, in particular not axially symmetrical, with respect to a radial direction of the tool rotation axis a forming a radial axis r and a plane of symmetry spanned by a radial and an axial direction of the tool rotation axis a.

[0133] The tool device 11 has a first side surface 45, which, in a fastened state of the tool device 11 on the tool holder device 213, is oriented toward the machine tool 211. The tool device 11 has a second side surface 47 facing away from the first side surface 45, which, in a state in which the tool device 11 is fastened to the tool holder device 213 with the machine tool 211, is oriented away from the machine tool 211. The first side surface 45 and the second side surface 47 delimit the tool device 11 in the axial direction relative to the tool rotation axis a.

[0134] The first side surface 45 of the tool device 11 has in particular a radially inner first side surface region 46, which is intended to form a contact surface 61 for resting on a tool holder device 213 of the machine tool 211.

[0135] The working area 15 is disk-shaped and flat. The working area 15 is located radially outward and limits the radial extent of the tool device 11. The working area 15 can be designed as a grinding tool with at least one grinding element formed as an abrasive grain or as a grinding edge, or as a cutting tool with a cutting edge or at least one cutting tooth. However, this is not intended to be limiting, as a person skilled in the art can also provide other working areas known to a person skilled in the art.

[0136] The connecting device 113, which is designed to absorb drive forces, is connected, in particular materially connected, to the working area 15 by means of a connecting area 55, which is designed to transmit drive forces of the machine tool 211 from the connecting device 113 to the working area 15. Machine tool and machine tool system:

[0137] The tool holding device 213 has at least the driving device 215 and the clamping device 217 movable relative to the driving device 215.

[0138] The clamping device 217 has two hook devices 217a, 217b designed as hook jaws 218a, 218b, which are rotatably mounted relative to one another about a clamping device rotation axis k of the clamping device 217.

[0139] The hook jaws 218a, 218b in Figure 1 For better illustration, they are arranged in a fictitious state, namely in a fastening state (right hook jaw 218a) and in a release state (left hook jaw 218b). This fictitious state of the hook jaws 218a, 218b is preferably not achievable in the machine tool 211 according to the invention, since both hook jaws 218a, 218b are arranged either in the fastening state or in the release state.

[0140] The hook jaws 218a, 218b protrude from the driving device 215 in a release state of the clamping device 217 in the axial direction to the output axis A, as for example on the left hook jaw 218a in Figure 3 can be seen. The hook jaws 218a, 218b protrude further from the driving device 215 in the axial direction relative to the output axis A when the tool holder device 213 is released than when it is fastened.

[0141] The fictitious state of the hook jaws 218a, 218b is preferably not achievable in the machine tool 211 according to the invention, since the machine tool 211 has a guide device which guides a movement of the hook jaws 218a, 218b in such a way that a movement of the two hook jaws 218a, 218b to each other is essentially symmetrical.

[0142] The term "guide device" is intended here, in particular, to define a device designed to exert a constraining force on the clamping device 217 at least along a clamping direction axially to the output axis A and / or radially to the output axis A of the clamping device in order to specify a movement of the clamping device 217 along the clamping direction. For this purpose, the guide device comprises at least one guide element designed as a guide pin 285, on or around which the clamping device 217 is guided, and at least one bearing element designed as a bearing pin 286, which is designed to rotatably mount the hook jaws 218a, 218b about a clamping device rotation axis k of the bearing pin 286.

[0143] The guide device has two guide recesses designed as guide grooves 281a, 281b, each of which forms a guide path for guiding the hook jaws 218a, 218b.

[0144] Both hook jaws 218a, 218b each have a guide groove 281a, 281b, which is intended to guide the hook jaws 218a, 218b by means of the guide pin 285. The two hook jaws 218a, 218b are designed symmetrically to each other. The guide grooves 281a, 281b of the hook jaws 218a, 218b are designed symmetrically to each other. Preferably, the movement of the two hook jaws 218a, 218b is substantially symmetrical, so that both hook jaws 218a, 218b are arranged either in a fastening position or in a release position.

[0145] In a release state of the clamping device 217, in which the hook jaws 218a, 218b are arranged in the release position, the hook jaws 218a, 218b project relative to the driving device 215 in the axial direction of the output axis A, as for example in Figure 2 or on the left hook jaw 218a in Figure 1 can be seen. The right hook jaw 218b from Figure 1is designed in a fastening state of the clamping device 217. The hook jaws 218a, 218b protrude further from the driving device 215 in a release state of the tool holding device 213 in the axial direction of the output axis A than in a fastening state in which the hook jaws 218a, 218b are arranged in the fastening position.

[0146] The guide pin 285 extends orthogonally to the output axis A. The guide pin 285 has the clamping device rotation axis k, in particular, the guide pin 285 forms the clamping device rotation axis k. The hook jaws 218a, 218b are pivotally mounted about the clamping device rotation axis k.

[0147] With the hook jaws 218a, 218b, tool devices 11 of different material thicknesses t of the connecting devices 113 can be clamped in the tool holding device 213 depending on a pivot angle of a clamping surface 233 of the clamping device 217 that is angled relative to the output axis A.

[0148] The hook jaws 218a, 218b each have at least one radial clamping recess 231, which is intended to clamp the tool device 11 in a fastened state at least in the axial direction of the output axis A and to release it in a released state. The clamping recesses 231 each have at least one clamping surface 233 for transmitting at least an axial force to the tool device 11. The clamping recess 231 is designed as a clamping recess extending in the radial direction of the output axis A. In the fastened state, the clamping surface 233 extends essentially in the radial direction of the tool rotation axis a. The clamping surface 233 is oriented in the axial direction of the output axis A toward the machine tool 211. The clamping surface 233 is flat. The clamping surface 233 can be curved at least in sections.Preferably, the clamping surface 233 contacts the connection device 113 of the tool device 11 at least partially in the form of a point contact, preferably in the form of a line contact, and particularly preferably in the form of a surface contact. The form of the contact can change depending on the material thickness t of the connection device 113 in the tool holder 213 to be connected to the tool holder 213. In particular, the form of the contact can change depending on an elastic deflection of the clamping wings 19 of the tool device 11 in the axial direction of the output axis A.

[0149] The hook jaws 218a, 218b overlap the clamping wings 19 in the radial direction of the output axis A in a fastening state by up to 4 mm, in particular by up to 3 mm.

[0150] The hook jaws 218a, 218b of the clamping device 217 each have at least one circumferential surface 245, which delimits a maximum radial extension of the hook jaws 218a, 218b. The circumferential surfaces 245 of the hook jaws 218a, 218b are oriented away from each other. The hook jaws 218a, 218b each have a first circumferential surface 245a and a second circumferential surface 245b, which are separated in the axial direction by the clamping recesses 231. The first and second circumferential surfaces 245a, 245b each delimit a radial extension of the clamping recess 231 associated with the circumferential surfaces 245a, 245b. The first circumferential surface 245a is curved at least around the output axis A.

[0151] The circumferential surfaces 245 of the hook jaws 218a, 218b protrude in a released state in the axial direction to the output axis A relative to the driving jaws 216a, 216b. The circumferential surface 245 of the hook jaws 218a, 218b is angled in a released state relative to the output axis A such that a distance of the circumferential surface relative to the output axis A decreases in an axial direction of the output axis A pointing from the tool holder device or the machine tool. The circumferential surface 245 of the clamping device 231 can form an angle λ ( Fig. 1 ) which is greater than 20° and less than 30°.

[0152] The clamping recesses 231 are provided to at least partially accommodate the tool device. The clamping recesses 231 are provided to at least partially accommodate the tool device in a released state. The clamping recesses 231 are provided to accommodate the tool device in a fastened state and to hold it on the tool holding device. In a released state, the clamping recesses 231 protrude at least partially in the axial direction from the driving jaws 216a, 216b. In a released state, the clamping recesses 231 protrude from the driving jaws 216a, 216b such that the connecting device 113 of the tool device is received by the clamping recesses 231. In a released state, the clamping recesses 231 are angled relative to the output axis A such that the connecting device 113 of the tool device 11 is received by the clamping recesses 231.The clamping recesses 231 are designed as circumferential recesses. The clamping recesses 231 can be designed such that, in a released state, the clamping recesses 231 open at least partially in the axial direction of the output axis A in order to accommodate the tool device 11, in particular the connection device 113 of the tool device 11.

[0153] The tool holder device 213 has a substantially rectangular opening 225, which is intended to receive the hook jaws 218a, 218b and, in particular, to support them movably in the axial direction of the output axis A. The opening 225 surrounds the hook jaws 218a, 218b in an orthogonal plane by up to 360°.

[0154] The hook jaws 218a, 218b protrude axially from the opening. The opening 225 is at least partially delimited by the second support surface. The opening 225 can accommodate or support the hook jaws 218a, 218b in a rotationally fixed manner about the output axis A. The opening 225 can be elongated in a radial plane.

[0155] The driving device 215 and the clamping device 217 are designed to reach through a single recess 17 of the tool device 11 extending through the entire material thickness t of the tool device 11 and to clamp the tool device 11 to the tool receiving device 213 by means of the hook jaws 218a, 218b which are movable essentially in the radial direction to the output axis A.

[0156] As in Figure 4As shown, the driving device 215 has four torque transmission regions 219 arranged in a star shape at a distance from this output axis A for transmitting a drive force to the tool device 11. At least one torque transmission region 219 can be designed as a rectilinear output edge 219a, in particular as an output edge region, or as a flat output surface 219b, in particular as an output surface region. The output edges 219a and the output surfaces 219b extend at least substantially parallel to a radial direction relative to the output axis A.

[0157] The output surfaces 219b of the torque transmission areas 219 are angled opposite to a direction of rotation of the tool holder device 213 during operation of the machine tool 211.

[0158] Each output surface 219b of the two driving jaws 216a, 216b is parallel to another output surface 219b of the other driving jaw 216a, 216b.

[0159] In a released state, the hook jaws 218a, 218b protrude in the axial direction of the output axis A relative to the driving jaws 216a, 216b. In a released state, the hook jaws 218a, 218b limit the axial extent of the tool holder. In a fastened state, the driving jaws 216a, 216b protrude in the axial direction of the output axis A relative to the hook jaws 218a, 218b. In a fastened state, the driving jaws 216a, 216b limit the axial extent of the tool holder.

[0160] The driving jaws 216a, 216b each have two radial elevations, which are designed as a torque transmission area 213.

[0161] The torque transmission areas 219 of the tool holder device 213 lie between a first orthogonal plane 235 and a second orthogonal plane 237 of the tool holder device 213 when the tool device 11 is fastened to the machine tool 211.

[0162] The first orthogonal plane 235 delimits the tool holder device 213 on the side facing the machine tool 211 in the direction of the output axis A, the second orthogonal plane 237 delimits the tool holder device 213 on the side facing away from the machine tool 211.

[0163] The torque absorption regions 219 extend in the radial direction of the output axis A at least in sections between a first and a second radial distance from the tool rotation axis a, and at least one of these sections is configured for torque transmission 219 from the machine tool 211 to the tool device 11.

[0164] Preferably, one torque transmission region 219, preferably several, particularly preferably all torque transmission regions 219 of the machine tool 211 contact the torque absorption regions 40 of the tool device 11 at least in sections in the form of a point contact, preferably in the form of a line contact and particularly preferably in the form of a surface contact.

[0165] The tool holder device 213 has two driving jaws 216a, 216b, each with two torque transmission areas 219, which are arranged rotationally symmetrically to one another around the drive axis A. The torque transmission areas 213 are arranged symmetrically to one another in the circumferential direction around the output axis A at an angle of 90°, so that the tool device can be connected to the tool holder device 213 in four rotational positions.

[0166] The output surfaces 219b and the output edges 219a are angled opposite to a direction of rotation of the tool holder device during operation of the machine tool 211.

[0167] The output surfaces 219b and the output edges 219a are angled at an angle β of up to 30°, in particular up to 25°, relative to a plane spanned by an axial direction and a radial direction of the output axis A in the circumferential direction around the output axis A.

[0168] Outer circumferential surfaces 239 adjoin the drive surfaces 219b in the circumferential direction. The outer circumferential surfaces 239 are provided to center the tool device 11 in a fastening state on the second boundary edges 25. In particular, the outer circumferential surfaces 239 are angled at an angle of approximately 1° in the circumferential direction around a radial axis of the output axis A relative to a plane spanned by an axial direction and a radial direction of the output axis A, whereby a tolerance in the radial direction becomes narrower when the tool device 11 is axially attached to the tool holder device 213 and the tool device 11 can be attached more precisely.

[0169] The driving jaws 216a, 216b each have an inner circumferential surface 240, which lies in at least the first orthogonal plane 235 on an inner circumferential circle 243 around the output axis A. The driving jaws 216a, 216b each have two outer circumferential surfaces 239, which lie in at least the first orthogonal plane 235 on an outer circumferential circle 245c, which in particular delimits the circumferential surface 245, around the output axis A. The inner circumferential circle 243 is concentric with the outer circumferential circle 245c. The inner circumferential circle 243 has a diameter around the output axis A of 22 mm, so that a minimum diameter of the recess 17 of the connection device 113, in particular the first boundary edge 21 of the clamping wing 19, which has approximately 22.2 mm, enables backward compatibility with conventional machine tools 211.

[0170] The driving jaws 216a, 216b have a width b of 10 mm.

[0171] At least one outer circumferential surface 239 of the driving jaws 216a, 216b is adjoined by a coding surface 241 which connects the inner circumferential surface 240 and the outer circumferential surface 239.

[0172] At least the inner circumferential surfaces 240, the outer circumferential surfaces 239, the coding surfaces 241 and the drive surfaces 219b delimit, at least in sections, the driving jaws 216a, 216b in the radial direction of the output axis A.

[0173] The driving device 215 is formed by two driving jaws 216a, 216b, which serve in particular as guide jaws and are intended to guide the hook jaws 218a, 218b in the radial direction by enabling movement of the hook jaws 218a, 218b in the radial direction of the output axis A around the clamping device rotation axis k and limiting radial movement perpendicular to this radial direction. The driving jaws 216a, 216b delimit the opening 225 in the radial direction of the tool rotation axis a along a main extension of the essentially rectangular opening 225.

[0174] Among other things, Figure 4The tool holder device 213 has a flat, circular support surface 261, which is intended to support the tool device 11, in particular at least the contact surface 61 of the tool device 11, in the axial direction. The support surface 261 is arranged at a radial distance from the hook jaws 218a, 218b and surrounds the hook jaws 218a, 218b in at least one plane by 360°. The support surface 261 extends orthogonally to the output axis A.

[0175] Figure 2shows sections of the working area 15 of the tool device 11, which is arranged on the connection device 113 in such a way that the working area 15, in a fastening state, protrudes relative to the connection device 113 along the tool rotation axis a in a direction oriented toward the tool holder device 213 of the machine tool 211. In a fastening state of the tool device 11, the contact surface 61 of the working area 15 can be in contact with the support surface 261 of the machine tool 211 and form a force-locking connection in the circumferential direction of the tool rotation axis a to the machine tool 11.

[0176] When the tool device 11 is mounted, the contact surface 61 forms a circumferentially non-positive support with the support surface 261 of the machine tool 211. This allows for an additional damping effect in the axial direction with an elastic working area 61. This also allows for preloading of the clamping wings 19 in the axial direction.

[0177] The support surface 261 extends in the radial direction of the output axis A between a first radial inner distance Ri and a second radial outer distance Ra from the output axis A, wherein the first radial inner distance Ri is smaller than the second radial outer distance Ra. The first radial inner distance Ri forms an inner radius of the support surface 261 that delimits the support surface 261. The second radial outer distance Ra forms an outer radius of the support surface 261 that delimits the support surface 261.

[0178] In a fastening state, the first boundary edge 21 of the clamping wing 19 of the tool device 11 protrudes from the first radial inner distance Ri of the support surface 261 in the radial direction toward the output axis A, in particular by up to 2 mm. The clamping wing 19 protrudes from the support surface 261 in such a way that in this area, in particular at least in the area of the first boundary edge 21, no support surface 261 or no support material for axially supporting the clamping wing 19 is present.

[0179] The clamping wing 19 does not rest on the support surface 261 in the radial direction, in particular not over its entire surface, so that the clamping wing 19 can be elastically bent at least partially in the axial direction. In particular, no support surface 261 is provided in the axial direction directly below the first boundary edge 22 of the clamping wing 19. In particular, no support surface 261 is provided in the axial direction directly below the second boundary edge 24 of the clamping wing 19. Thus, in a fastening state, the first boundary edge 22 and / or the second boundary edge 24 of the tool device 11 has a maximum radial extent that is smaller than a minimum extent or the first radial inner distance Ri of the support surface 261.

[0180] The driving device 215 can be designed as a protective device. The driving device 215 has a maximum radial extent that is greater than a maximum radial extent of the clamping device 217 in a fastened state, whereby the driving jaws 216a, 216b, which protrude in the radial direction of the output axis A during a rotary drive of the tool holder device 213, ensure protection of the hook jaws 218a, 218b in that the hook jaws 218a, 218b are protected by the driving jaws 216a, 216b in the event of accidental contact with a workpiece during operation of the machine tool 211.

[0181] In particular, the hook jaws 218a, 218b can protrude relative to the driving jaws 216a, 216b in a release state of the tool holder device 213 in the axial direction of the output axis A in a direction oriented away from the tool holder device 213.

[0182] In particular, the projection edge 22 of the connection device 113 of the tool device 11 is shorter in the circumferential direction, in particular by up to 70%, preferably by up to 50%, preferably by up to 30%, particularly preferably by up to 20%, further preferably by up to 10%, than a, in particular minimal, extension of the circumferential surface 245 in the circumferential direction around the output axis A, so that the tool holding device 213 can be pre-centered or roughly centered around the hook jaws 218a, 218b in a release state during a placement process of the tool device 11.

[0183] The tool holder device has a first attachment area and a second attachment area. The first attachment area is designed as a first flat attachment surface. The second attachment area is designed as a second flat attachment surface. The first attachment surface delimits an axial extent of the driving device. The first attachment surface delimits an axial extent of the tool holder device in a fastened state. The second attachment surface surrounds the first attachment area, in particular in a plane of 360°. The attachment surfaces extend at least substantially in the radial direction of the output axis and in the circumferential direction around the output axis. The first attachment surface is spaced from the second attachment surface in the axial direction of the output axis and is arranged in particular parallel. The attachment surfaces delimit the output surfaces 219b and the output edges 219a.The support surfaces are oriented away from the tool holder. When attached, the tool rests on the second support surface. When released, the tool rests on the first support surface. The second support surface can be the support surface.

[0184] The driving device 217 has a circumferential limiting contour which limits a radial extension of the driving device 217, in particular of the driving jaws 216a, 216b.

[0185] The circumferential limiting contour of the driving device 217 forms a coding device 251, which is designed in the area of the output axis A as a raised section of the tool holder device 213.

[0186] This coding device 251 is designed to engage in the recess 17 of the tool device 11, as shown in Figure 12The coding device 251 essentially corresponds to a negative form of the boundary contour of the recess 17 of the connecting device 113 and thus enables a positive connection between the tool device 11 and the tool holder device 213.

[0187] However, shapes of the recess 17 which deviate from the negative shape are also possible, which at least in sections have a radial extension which is larger than an inner circumferential circle 243, in particular larger than the outer circumferential circle 245c, of the driving jaws 216a, 216b.

[0188] The coding device 251 is formed by the circumferential surfaces (inner circumferential surface 240, outer circumferential surfaces 239, coding surface 241 and output surfaces 219b) of the driving jaws 216a, 216b.

[0189] The coding device 251 is rotationally symmetrical to the output axis A, in particular according to an n-fold rotational symmetry. However, it is also conceivable for the coding device 251 to have a design that deviates from a rotationally symmetrical design, such as an asymmetrical design or the like.

[0190] Furthermore, the tool device 11 can also be used with conventional tool holding devices 213 of a machine tool 211, in particular an angle grinder, provided for receiving a tool device 11, for example by means of a screw device (not shown in detail) comprising at least one fastening screw, a washer, and a nut part. The tool device 11 is held on the machine tool 211 by means of the fastening screw, which exerts its force on the tool device 11 via the washer. The transmission of the drive forces from the machine tool 211 to the tool device 11 is achieved essentially by the positive engagement of the torque transmission region 219 and the torque absorption region 40.The tool device 11 is held on the machine tool 211 such that the tool rotation axis a and the output axis A essentially coincide. The tool device 11 is driven in rotation about the output axis A.

[0191] Figures 5b, 5c , 5d and 5e show alternative embodiments of the tool holder device 213 of the hand-held power tool 211 for receiving tool devices 11, which have a symmetrical design of a connection device 113. The Figures 5b, 5c , 5d and 5e The tool holding devices 213 shown have an at least substantially analogous design to that shown in the preceding figures, in particular in the Figure 5a , shown tool holder device 213. In contrast to the tool holder device 213 shown in the previous figures, the tool holder devices shown in the Figures 5b, 5c , 5d and 5eThe tool holder devices 213 shown have a driving device 215 that is symmetrical to a plane of symmetry that runs at least substantially parallel to the output axis A. Preferably, the output axis A runs in the plane of symmetry to which the driving device 215 is symmetrical.

[0192] The Figure 5bThe driving device 215 shown preferably has driving jaws 216a, 216b which are designed symmetrically to one another. In particular, the driving jaws 216a, 216b are designed mirror-symmetrically to one another, in particular with respect to a plane of symmetry comprising the output axis A. Preferably, the driving jaws 216a, 216b are each designed mirror-symmetrically to a plane extending at least substantially perpendicular to the plane of symmetry. Preferably, at least one insertion recess of the driving device 215 is arranged on each of the driving jaws 216a, 216b, into which a clamping wing 19, in particular having a rectangular, preferably trapezoidal cross-section, of a Figure 5b not shown in detail and corresponding to the tool holder device 213 from Figure 5bdesigned tool device 11. In particular, the driving jaws 216a, 216b each have at least one insertion bevel. The insertion bevel is arranged on the respective driving jaw 216a, 216b on an outer surface of the respective driving jaw 216a, 216b that at least partially delimits the insertion recess.

[0193] The Figure 5cThe driving device 215 shown preferably has driving jaws 216a, 216b that are symmetrical to one another. In particular, the driving jaws 216a, 216b are mirror-symmetrical to one another, in particular with respect to a plane of symmetry encompassing the output axis A. Preferably, the driving jaws 216a, 216b are each mirror-symmetrical to a plane extending at least substantially perpendicular to the plane of symmetry. The driving jaws 216a, 216b each have a rectangular basic shape with at least two beveled edges. On an outer side of the respective driving jaw 216a, 216b that connects the two beveled edges to one another, the driving jaws 216a, 216b each comprise an extension. The extension of the respective driving jaw 216a, 216b is preferably circular segment-shaped. The extension of the respective driving jaw 216a, 216b can, for example, be an assembly coding element of the Figure 5cPreferably, an inner surface of the clamping device 217 extending at least substantially perpendicular to a clamping surface 233 of a clamping device 217 of the tool holding device 213 shown in Figure 10c has a circular segment-shaped extension. The extension of the clamping device 217 can, for example, be a fastening coding element of the Figure 5c tool holder device 213 shown. Preferably, a fastening of a tool device (in Figure 5c not shown in detail), which has a recess which does not correspond to the extension of the clamping device 217, advantageously by means of the clamping device 217 of the Figure 5cThe tool holder device 213 shown can be largely avoided. Preferably, extensions of the driving jaws 216a, 216b and extensions of the clamping device 217 form a four-fold circumferential contour of the tool holder device 213 in a plane extending at least substantially perpendicular to the output axis A.

[0194] The Figure 5d The driving device 215 shown preferably has driving jaws 216a, 216b which are designed symmetrically to one another.

[0195] In particular, the driving jaws 216a, 216b are mirror-symmetrical to one another, in particular with respect to a plane of symmetry encompassing the output axis A. Preferably, the driving jaws 216a, 216b are each mirror-symmetrical to a plane extending at least substantially perpendicular to the plane of symmetry. Preferably, each driving jaw 216a, 216b has at least two clamping wings 19 corresponding to a Figure 5dThe drive and / or coding contours are preferably formed as depressions in an outer contour of the drive device 215, in particular viewed in a plane extending at least substantially perpendicular to the output axis A. A clamping device 217 of the drive device 215 shown in Figure 5dThe tool holder device 213 shown comprises an inner surface of the clamping device 217 that extends at least substantially perpendicular to a clamping surface 233 of the clamping device 217. The inner surface, viewed in the plane extending at least substantially perpendicular to the output axis A, has a profile analogous to one of the driving and / or coding contours. Preferably, the driving and / or coding contours of the driving jaws 216a, 216b and inner surfaces of the clamping device 217 form a six-fold circumferential contour of the tool holder device 213 in the plane extending at least substantially perpendicular to the output axis A.

[0196] The Figure 5eThe illustrated driving device 215 preferably has driving jaws 216a, 216b that are symmetrical to one another, in particular driving jaws 216a, 216b that are point-symmetrical to one another. Preferably, at least two assembly coding elements 300, 302, 308, 310 of the tool holding device 213 are arranged on the driving device 215 for each driving jaw 216a, 216b. Alternatively or additionally, it is conceivable that two assembly coding elements 300, 302, 308, 310 of the tool holding device 213 are arranged at least substantially adjacent to the hook device 217a, 217b. The at least two assembly coding elements 300, 302, 308, 310 of the tool holding device 213 arranged on the respective driving jaw 216a, 216b preferably each have a maximum circumferential extent that is less than or equal to 17 mm.Preferably, the at least two assembly coding elements 300, 302, 308, 310 of the tool holding device 213 arranged on the respective driving jaw 216a, 216b are arranged, in particular together, within an angular range with a value from a value range of 10° to 40° on the respective driving jaw 216a, 216b.

[0197] Figures 13 to 18 show views of additional details of the machine tool system described in the previous Figures 1 to 12 have not been shown for the sake of clarity in order to ensure easy readability of the Figures 1 to 12 to enable. The Figures 13 to 18 The disclosed features are analogous to the Figures 1 to 12 transferable.

[0198] The tool device 11 comprises at least one tool assembly coding element 304, 306, 312, 314, which is intended to interact with at least one assembly coding element 300, 302, 308, 310 of the tool holder device 213 when the tool device 11 is arranged on the tool holder device 213. The at least one tool assembly coding element 304, 306, 312, 314 of the tool device 11 and the at least one assembly coding element 300, 302, 308, 310 of the tool holder device 213 are, in particular, designed to correspond. Preferably, the at least one assembly coding element 300, 302, 308, 310 of the tool holder device 213 is provided to code an arrangement, a fixing or a placement of the tool device 11 on or onto the tool holder device 213, in particular the support surface 261.Preferably, the at least one assembly coding element 300, 302, 308, 310 of the tool holder device 213 is provided to code an arrangement, a fixing or a placement of the tool device 11 on or onto the tool holder device 213, in particular the support surface 261, according to a key-keyhole principle.

[0199] The driving device 215 comprises at least one assembly coding element 300, 302, which is intended to interact with at least one tool assembly coding element 304, 306 of the tool device 11 when the tool device 11 is arranged on the tool receiving device 213. The at least one assembly coding element 300, 302 of the driving device 215 is arranged on at least one driving jaw 216a, 216b of the driving device 215 (see. Figure 13 ).

[0200] The at least one assembly coding element 300, 302 of the driving device 215 is designed as a mechanical assembly coding element. The at least one assembly coding element 300, 302 of the driving device 215 is formed integrally with the driving jaw 216a, 216b. The at least one assembly coding element 300, 302 of the driving device 215 is designed as an extension. However, it is also conceivable for the at least one assembly coding element 300, 302 of the driving device 215 to have a different design that would appear appropriate to a person skilled in the art, such as a recess, a web, or the like. The at least one assembly coding element 300, 302 of the driving device 215 preferably extends at least along a direction running transversely, at least substantially perpendicularly, to the tool rotation axis a of the tool device 11.The at least one assembly coding element 300, 302 of the driving device 215 is arranged adjacent to the inner circumferential surface 240 of the at least one driving jaw 216a, 216b. The at least one assembly coding element 300, 302 of the driving device 215 extends from the inner circumferential surface 240 of the at least one driving jaw 216a, 216b, in particular in a direction away from the tool rotation axis a, in particular up to a maximum of the circumferential surface 245, which is delimited by the outer circumferential circle 245c (cf. ). Figures 12 and 13 ).

[0201] The at least one assembly coding element 300, 302 of the driving device 215 is preferably arranged, viewed along a circumferential direction, between the drive edge 219a and / or the drive surface 219b and a side of the driving jaw 216a, 216b facing away from the drive edge 219a and / or the drive surface 219b. Preferably, the at least one assembly coding element 300, 302 of the driving device 215 has a maximum extension along the circumferential direction that is smaller than a maximum distance between the drive edge 219a and / or the drive surface 219b and the side of the driving jaw 216a, 216b facing away from the drive edge 219a and / or the drive surface 219b along the circumferential direction.Preferably, the at least one assembly coding element 300, 302 of the driving device 215 is arranged in an angular range of less than 60° between the drive edge 219a and / or the drive surface 219b and the side of the driving jaw 216a, 216b facing away from the drive edge 219a and / or the drive surface 219b.

[0202] The at least one assembly coding element 300, 302 of the carrier device 215 can have any configuration that appears appropriate to a person skilled in the art. For example, it is conceivable that the at least one assembly coding element 300, 302 of the carrier device 215, particularly viewed in the first orthogonal plane 235, has a polygonal (square, cuboid, triangular, n-sided, or the like) or a circular (semicircular, semicircular with a wavy outer circumferential line, or the like) cross-section, as is also shown by way of example in the Figure 15can be derived because the at least one tool assembly coding element 304, 306, 312, 314 of the tool device 11 is preferably designed to correspond to the at least one assembly coding element 300, 302, 308, 310 of the tool receiving device 213. However, it is also conceivable that the at least one tool assembly coding element 304, 306, 312, 314 of the tool device 11 and the at least one assembly coding element 300, 302, 308, 310 of the tool receiving device 213 are designed differently, in particular with regard to a size dimension. For example, it is conceivable that the at least one tool assembly coding element 304, 306, 312, 314 of the tool device 11 has a maximum extension along a circumferential direction or along a radial direction which corresponds to a multiple of a maximum extension of the at least one assembly coding element 300, 302, 308, 310 of the tool holding device 213 or the like.

[0203] Preferably, at least one assembly coding element 300, 302 is arranged at least on each driving jaw 216a, 216b of the driving device 215 (cf. Figure 13 ). However, it is also conceivable for more than one assembly coding element 300, 302 to be provided per driving jaw 216a, 216b, such as at least two, at least three, at least four, or more assembly coding elements 300, 302 per driving jaw 216a, 216b. The assembly coding elements 300, 302 arranged on the driving jaws 216a, 216b have, in particular, a configuration analogous to one another. A different configuration of the assembly coding elements 300, 302 is also conceivable.

[0204] Preferably, the assembly coding elements 300, 302 of the driving device 215 arranged on the driving jaws 216a, 216b are arranged asymmetrically on the driving jaws 216a, 216b with respect to a plane encompassing the output axis A. However, it is also conceivable that the assembly coding elements 300, 302 of the driving device 215 arranged on the driving jaws 216a, 216b are arranged symmetrically on the driving jaws 216a, 216b with respect to a plane encompassing the output axis A, as is particularly exemplified by the possible corresponding arrangements of the tool assembly coding elements 304, 306, 312, 314 from the Figure 1 can be derived.

[0205] The clamping device 217, in particular at least the hook device 217a, 217b of the clamping device 217, comprises at least one assembly coding element 308, 310 (cf. Figures 13 and 17). The assembly coding element 308, 310 of the clamping device 217 is preferably arranged on the hook jaw 218a, 218b, in particular in the clamping recess 231 of the hook jaw 218a, 218b. The clamping device 217 preferably comprises a plurality of assembly coding elements 308, 310, in particular at least two. However, it is also conceivable for the clamping device 217 to have a number of assembly coding elements 308, 310 other than one and two, which are arranged on the hook device 217a, 217b. Preferably, the at least one assembly coding element 308, 310 of the clamping device 217 forms a fixing coding element, which is provided for coding a fastening of the tool device 11 to the tool holding device 213. Preferably, the at least one assembly coding element 308, 310 of the clamping device 217 is provided to code a fastening of the tool device 11 to the tool receiving device 217 according to a key-keyhole principle.

[0206] Preferably, the at least one assembly coding element 308, 310 of the clamping device 217 is formed integrally with the hook jaw 218a, 218b. However, it is also conceivable for the at least one assembly coding element 308, 310 of the clamping device 217 to be formed separately from the hook jaw 218a, 218b and to be fixed to the hook jaw 218a, 218b by means of a connection that would be deemed appropriate by a person skilled in the art. Preferably, the at least one assembly coding element 308, 310 of the clamping device 217 is arranged on the clamping surface 233 of the clamping device 217, in particular directly adjacent to the clamping surface 233, which at least partially delimits the clamping recess 231. The at least one assembly coding element 308, 310 of the clamping device 217 has, in particular, a maximum extension within the clamping recess 231 that is smaller than a maximum extension of the clamping surface 233 of the clamping device 217.Preferably, the at least one assembly coding element 308, 310 of the clamping device 217 is designed as an extension. However, it is also conceivable for the at least one assembly coding element 308, 310 of the clamping device 217 to have a different design that appears expedient to a person skilled in the art, such as a design as a recess, a groove, a web, a serrated contour or the like. The at least one assembly coding element 308, 310 of the clamping device 217 can be arranged symmetrically or asymmetrically to a center plane, in particular a plane of symmetry, of the hook jaw 218a, 218b on the hook jaw 218a, 218b, as is particularly exemplified by the possible corresponding arrangements of the tool assembly coding elements 304, 306, 312, 314 from FIG. Figure 18 can be derived.

[0207] Preferably, the center plane of the hook jaw 218a, 218b, in particular the plane of symmetry to which the hook jaws 218a, 218b are at least substantially symmetrical, at least except for the arrangement of the assembly coding element 308, 310, runs at least substantially parallel to the output axis A and / or encompasses it. It is also conceivable for the at least one assembly coding element 308, 310 of the clamping device 217 to be arranged on the hook jaw 218a, 218b at a distance from the center plane, in particular from the plane of symmetry, of the hook jaw 218a, 218b.

[0208] The connection device 113 of the tool device 11 has at least one tool assembly coding element 304, 306, 312, 314, which is intended to interact with the at least one assembly coding element 300, 302, 308, 310 of the tool holder device 213 when the tool device 11 is arranged on the tool holder device 213. The at least one tool assembly coding element 304, 306, 312, 314 is arranged on the at least one clamping wing 19 of the connection device 113 (see Figure 18 ). The at least one tool assembly coding element 304, 306, 312, 314 has a maximum extension along a radial axis r, which corresponds at most to a maximum distance between the first limiting circle 23 and the second limiting circle 27 of the connecting device 113, as is exemplified by the different possible embodiments of the connecting device 113 in Figure 18can be seen. The at least one tool assembly coding element 304, 306, 312, 314 is preferably arranged in an angular range between the drive edge 40a and the coding edge 35 of the connection device 113 on the clamping wing 19 of the connection device 113. In particular, the angular range has a maximum extension of less than 90°, preferably less than 60°, and particularly preferably less than 40°. The at least one tool assembly coding element 304, 306, 312, 314 has a maximum extension along a circumferential direction, which is preferably smaller than a maximum distance between the drive edge 40a and the coding edge 35 of the connection device 113. In particular, the at least one tool assembly coding element 304, 306, 312, 314 extends along a circumferential direction in a region between the drive edge 40a and the coding edge 35.The area between the drive edge 40a and the coding edge 35 is preferably arranged within the first boundary circle 23 and the second boundary circle 27 of the connecting device 113. Preferably, the area is formed by a partial area of a circular ring defined by the first boundary circle 23 and the second boundary circle 27 of the connecting device 113, as is exemplified by the various possible embodiments in the table in . Figure 18 can be seen, whereby a combination of the illustrated embodiments is also conceivable. The connecting device 113 preferably comprises a plurality of tool assembly coding elements 304, 306, 312, 314, which can be arranged symmetrically, in particular according to an n-fold rotational symmetry, or asymmetrically on the connecting device 113, in particular on the clamping wings 19.

[0209] Figure 14shows an embodiment of the tool device 11 according to the invention with at least one tool assembly coding element 304, 306, 312, 314, which is intended to cooperate with at least one assembly coding element 300, 302, 308, 310 of the tool holder device 213 when the tool device 11 is arranged on the tool holder device 213. The at least one tool assembly coding element 304, 306, 312, 314 is arranged on the at least one clamping wing 19 of the connection device 113. The at least one tool assembly coding element 304, 306, 312, 314 has a maximum extension along a radial axis r, which corresponds at most to a maximum distance between the first limiting circle 23 and the second limiting circle 27 of the connection device 113, as is exemplified by the different possible embodiments of the connection device 113 in Figure 18The at least one tool assembly coding element 304, 306, 312, 314 is preferably arranged in an angular range between the drive edge 40a and the coding edge 35 of the connecting device 113 on the clamping wing 19 of the connecting device 13.

[0210] The Figure 14 The tool device 11 shown comprises, alternatively or in addition to the at least one tool assembly coding element 304, 306, 312, 314, at least one additional tool assembly coding element 316, 318, 320, 322, which is provided to encode a securing and / or positioning element 324 (for example in Figures 16a and 16bshown). The movably mounted securing and / or positioning element 324 of the tool holding device 213 can be designed, for example, as a spring-loaded locking bolt or the like. The at least one additional tool assembly coding element 316, 318, 320, 322 is preferably arranged on the clamping wing 19. Preferably, the at least one additional tool assembly coding element 316, 318, 320, 322 is designed as a material-free opening in the clamping wing 19, in particular as a recess extending completely through a maximum material thickness h of the clamping wing 19. However, it is also conceivable that the additional tool assembly coding element 316, 318, 320, 322 is designed as a depression, such as a depression produced by a stamping process, on the clamping wing 19 and / or on the support flange 14, as is shown by way of example in Figures 16a and 16bis shown. The support flange 14 can be formed in one piece with the working area 15 or can be connected to the working area 15 in a form-fitting and / or force-fitting manner by means of a fastening element of the support flange 14, in particular produced by a stamping process (cf. Figures 16a and 16b ).

[0211] A maximum diameter dw of the at least one additional tool assembly coding element 316, 318, 320, 322 preferably corresponds to a value from a value range of 0.8 mm to 1.6 mm. Preferably, the at least one additional tool assembly coding element 316, 318, 320, 322 is arranged in a radial region between the first limiting circle 23 and the second limiting circle 27 on the clamping wing 19. However, it is also conceivable for the at least one additional tool assembly coding element 316, 318, 320, 322 to be arranged in a different region of the tool device 11. Advantageously, the tool device 11 comprises a plurality of additional tool assembly coding elements 316, 318, 320, 322, which are preferably arranged evenly distributed on the tool device 11, in particular on the support flange 14 of the tool device 11.In particular, the additional tool assembly coding elements 316, 318, 320, 322 are arranged on a common circular ring 326 having a maximum diameter within a range of 23 mm to 28 mm. The common circular ring preferably has a center point located on the tool rotation axis a.

[0212] Figure 15 shows a detailed view of one of the clamping wings 19. Preferably, the clamping wing 19 has a maximum reference value D corresponding to a spring rate with a value from a range of 10,000 N / mm to 350,000 N / mm. The maximum reference value D of the clamping wing corresponding to a spring rate preferably results from the following relationship: F = Dz, where D = 3 EI L 3 , z = FL 3 3 EI , I = bh 3 12 with L as the, in particular averaged, maximum extension of the clamping wing 19 between the first limiting circle 23 and the second limiting circle 27, in particular along a direction running at least substantially parallel to the radial axis r, with b as the maximum tangential extension of the clamping wing 19 tangential to the second limiting circle 27 and with h as the maximum material thickness of the clamping wing 19 along the axial direction of the tool rotation axis a. The maximum material thickness h can preferably correspond to a value from a range of 0.5 mm to 1.6 mm.

[0213] The Figure 18The tabular list shown of exemplary embodiments of the connection device 113, in particular with regard to embodiments of the tool assembly coding elements 304, 306, 312, 314, shows in a first column of the tabular list possible embodiments of the tool assembly coding elements 304, 306, 312, 314 with regard to a size, in particular a length, a width or the like. A second column of the tabular list shows possible embodiments of the tool assembly coding elements 304, 306, 312, 314 with regard to a shape, such as a polygonal shape, a circular shape or the like.A third column of the tabular list shows possible designs of the tool assembly coding elements 304, 306, 312, 314 with respect to an arrangement relative to the radial axis r or to a plane encompassing the tool rotation axis a, such as a symmetrical arrangement to the radial axis r, a one-sided arrangement to the radial axis r, an n-fold rotational symmetry or the like. In . Figure 18 The reference symbols are assigned to only one possible embodiment in order to improve the readability of the table. Figure 18 However, the possible designs of the connection device 113 shown, in particular with regard to possible designs of the tool assembly coding elements 304, 306, 312, 314, should not be regarded as limiting here, since the tool assembly coding elements 304, 306, 312, 314 can have further possible designs that appear reasonable to a person skilled in the art.

Claims

1. Machine tool, in particular hand-held machine tool, preferably angle grinder, which has a tool receptacle device (213) which is rotatable about a drive output axis (A), wherein this tool receptacle device (213) is specified to hold a tool device (11), in particular an insert tool, on the machine tool (211) in such a manner that the drive output axis (A) and a tool rotation axis (a) coincide, wherein the tool receptacle device (213) has at least one entrainment device (215) and a clamping device (217) which is movable relative to the entrainment device (215), wherein this entrainment device (215) for transmitting a driving force to the tool device (11) has at least one torque transmission region (219) disposed at a spacing from this drive output axis (A), characterized in that the entrainment device (215) and the clamping device (217) are provided to penetrate a clearance (17) of the tool device (11), which extends in particular through the entire material thickness of the tool device (11), and to clamp the tool device (11) by means of the clamping device (217) which is movable in the radial direction to the drive output axis (A), wherein the entrainment device is provided to guide the clamping device of the tool receptacle device in a movement proceeding from a releasing state to a fastening state, or vice versa.

2. Machine tool according to Claim 1, characterized in that the tool receptacle device (213) has an axial opening (225) which is provided to receive the clamping device (217).

3. Machine tool according to one of the preceding claims, characterized in that the entrainment device (215) is formed by at least one entrainment jaw (216a, 216b) which serves as a guide jaw and delimits the opening (225) at least in portions in the radial direction of the drive output axis (A), and which is provided to guide the clamping device (217) of the tool receptacle device (213) in the radial direction.

4. Machine tool according to one of the preceding claims, characterized in that the entrainment device (215) has a maximum radial extent of the drive output axis (A) which is larger than a maximum radial extent of the clamping device (217) in a fastening state.

5. Machine tool according to one of the preceding claims, characterized in that the clamping device (217) in a releasing state of the tool receptacle device (213) projects from the entrainment device (215) in the axial direction of the drive output axis (A), in a direction oriented away from the machine tool (211).

6. Machine tool according to one of the preceding claims, characterized in that the at least one torque transmission region (219) is angled counter to a rotating direction of the tool receptacle device (213) during operation of the machine tool (211).

7. Machine tool according to one of the preceding claims, characterized in that the tool receptacle device (213), in particular the clamping device (217), has an activation device (229) which during an axial activation of the activation device (229) by means of an activation force is provided to transfer the clamping device (217) from a releasing state to a fastening state.

8. Machine tool according to one of the preceding claims, characterized in that the clamping device (217) has at least one radial clamping clearance (231) which is provided to clamp the tool device (11) in a fastening state at least in the axial direction of the drive output axis (A), and to release said tool device in a releasing state.

9. Machine tool according to one of the preceding claims characterized in that the entrainment device (215) comprises an assembly coding element (300, 302) which in a state in which the tool device (11) is disposed on the tool receptacle device (213) is provided to interact with a tool assembly coding element (304, 306) of the tool device (11), and / or in that the assembly coding element (300, 302) of the entrainment device (215) is disposed on at least one entrainment jaw (216a, 216b) of the entrainment device (215), and / or in that the assembly coding element (300, 302) of the entrainment device (215) is disposed so as to be contiguous to an internal circumferential face (240) of the at least one entrainment jaw (216a, 216b).

10. Machine tool according to one of the preceding claims, characterized in that the clamping device (217) comprises at least one assembly coding element (308, 310), and / or in that the clamping device (217) has a clamping clearance (231), wherein the assembly coding element (308, 310) is disposed in a clamping clearance (231).

11. Machine tool system comprising at least one machine tool (211) according to one of the preceding claims and a tool device (11) which is able to be received by the machine tool (211), characterized in that the clamping device (217) comprises at least one assembly coding element which is provided to code fastening of the tool device to the tool receptacle device (213), wherein the tool device (11) has at least one tool assembly coding element (304, 306, 312, 314) which in a state in which the tool device (11) is disposed on the tool receptacle device (213) is provided to interact with at least the assembly coding element (300, 302, 308, 310) of the tool receptacle device (213), wherein the at least one tool assembly coding element (304, 306, 312, 314) is disposed on at least one clamping wing (19) of a connector device (113) of the tool device (11).

12. Machine tool system according to Claim 11, characterized in that the tool device (11) has a tool rotation axis (a) and a connector device (113) having a clearance (17), which is provided to at least partially, in particular completely, encompass the tool receptacle device (213) of the hand-held machine tool (11) in the circumferential direction of the drive output axis (A), and in that the tool device (11) has at least one torque absorption region (40) which delimits the clearance (17) at least in portions in the radial direction of the tool rotation axis (a), and in that the connector device (113) extends in the axial direction between a first connector face (49) and a second connector face (50) facing away from the first connector face (49), in that these connector faces (49, 50) are disposed orthogonally to the tool rotation axis (a), and in that these connector faces (49, 50) form a material thickness t of the connector device (113), and in that the at least one torque absorption region (40) is disposed between these connector faces (49, 50).

13. Machine tool system according to one of Claims 11 to 12, characterized in that the tool receptacle region (213) has a flat, in particular annular, support face (261) which is provided to support at least one contact face (61) of the tool device (11) in the axial direction, and in that the support face (261) extends in the radial direction of the tool rotation axis (a) between a radial internal spacing (Ri) and a radial external spacing (Ra) from the drive output axis (A), and in that the connector device (113) of the tool device (11) has at least one clamping wing (19) which at least partially delimits the clearance (17) in the radial direction and which substantially in the radial direction to the tool rotation axis (a) is delimited by a first delimitation edge (21), and in that the clamping wing (19), in particular the first delimitation edge (21), in a state of the tool device (11) in which the latter is fastened to the machine tool (211), projects from the radial internal spacing (Ri) of the support face (261) in the radial direction to the drive output axis (A) in such a way that no support material for supporting the clamping wing (19) is present in this region.

14. Machine tool system according to Claim 11, characterized in that the connector device (113) has at least two clamping wings (19) which substantially in the radial direction to the tool rotation axis (a) are in each case delimited by a first delimitation edge (21) which forms an extent of the clamping wing in the circumferential direction of the tool rotation axis (a) and which lies on an in particular minimum first delimitation circle (23) about the tool rotation axis (a), and in that the clamping device (217) has a circumferential face (245) which delimits a radial extent of the clamping device (117), and in that a spacing of at least two mutually adjacent first delimitation edges (21) in the circumferential direction of the tool rotation axis (a) is smaller than a spacing of an in particular minimum extent of the circumferential face (245) of the clamping device (217) in the circumferential direction.

15. Machine tool system according to one of Claims 11 to 14, characterized in that the at least one tool assembly coding element (304, 306, 312, 314) is disposed in an angular range between a driving edge (40a) and a coding edge (35) of the connector device (113) on a clamping wing (19) of the connector device (113), and / or in that the clamping wing (19) extends at least substantially along a plane orthogonal to the tool rotation axis (a) and is asymmetrical, in particular not axially symmetrical, in relation to a radial direction of the tool rotation axis (a), which forms a radial axis (r), of a symmetry plane defined by a radial and an axial direction of the tool rotation axis (a), and / or in that the at least one tool assembly coding element (304, 306, 312, 314) is disposed on at least one clamping wing (19) of the connector device (113), and / or along a radial axis (r) has a maximum extent which corresponds to at most a maximum spacing between a first delimitation circle (23) and a second delimitation circle (27) of the connector device (113).