Patent Application
20240173818
This application claims priority under 35 U.S.C. § 119 to application no. DE 10 2022 212 749.8, filed on Nov. 29, 2022 in Germany, the disclosure of which is incorporated herein by reference in its entirety.
A machine tool device has already been proposed for connecting a tool to a tool holder of a machine tool, with at least one driver unit for a rotationally fixed connection to the tool and with at least one fastening unit for axial fastening of the tool to the tool holder.
The disclosure is based on a machine tool device, in particular a tool adapter, for connecting a tool, in particular a brush, to a tool holder of a machine tool, in particular an angle grinder, with at least one driver unit for a rotationally fixed connection to the tool and with at least one fastening unit for axial fastening of the tool to the tool holder.
It is proposed that the machine tool device has a positive locking unit by means of which the driver unit and the fastening unit can be connected to each other in a rotationally fixed manner via a positive locking.
Such a design of the machine tool device makes it structurally easy to connect a tool to a tool holder of a machine tool. A particularly flexible use of tools and/or tool holders of machine tools can be achieved. Advantageously, a structurally simple machine tool device can be provided. It is advantageous to use a tool with different tool holders. Costs can be saved advantageously. Advantageously, the tool can be reliably attached to different tool holders.
In a state connected to the fastening unit, the driver unit is connected to the fastening unit in a rotationally fixed manner, preferably by means of the positive locking unit. In particular, the driver unit is connected to the fastening unit at least in one operating state, preferably non-rotatably, preferably via the positive locking unit. The driver unit is preferably non-rotatably connected to the tool in a state connected to the tool, preferably via the positive locking unit and/or a further positive locking unit of the machine tool device. In particular, the driver unit is non-rotatably connected to the tool in at least one operating state, preferably via the positive locking unit and/or the further positive locking unit. The machine tool device, in particular the driver unit and/or the fastening unit, is/are non-rotatably connected to the tool in a state connected to the tool, preferably at least in an operating state, preferably via the positive locking unit and/or the further positive locking unit.
In particular, the machine tool device has a flange. The flange is preferably in contact with a bearing surface of the tool holder in a state of the machine tool device attached to the tool holder, in particular at least in the operating state. The driver unit preferably has a base body. The flange is preferably arranged on the driver unit, in particular on the base body of the driver unit. The flange is preferably formed in one piece with the base body. “In one piece” can be understood as meaning connected at least by substance-to-substance bonding, for example by a welding process, an adhesive bonding process, a process of molding on and/or another process that appears to be useful to the person skilled in the art, and/or advantageously formed in one piece, for example by production from a casting and/or by production in a single- or multi-component injection molding method and advantageously from a single blank.
The tool preferably has a tool interface, in particular a tool hub, for connection to a tool holder of a machine tool. Preferably, the tool interface, in particular the tool hub, of the tool is provided for a force-fit and/or positive locking connection with a quick-clamping device of a tool holder of a further machine tool, in particular one that is different from the above-mentioned machine tool. The quick-clamping device is preferably free of a thread. The tool interface, in particular the tool hub, of the tool is preferably free of a thread. The tool holder of the machine tool is preferably free of a quick-clamping device. The tool holder preferably has a thread, in particular an external thread, for a connection to a further tool, in particular one that is different from the above-mentioned tool, which has a thread, preferably an internal thread, corresponding to the thread of the tool holder.
The tool is preferably designed as a brush. Alternatively, however, it is also conceivable that the tool is designed as a cut-off wheel, polishing wheel, saw blade, drill bit, backing pad or any other tool that would appear useful to a person skilled in the art. The machine tool device is intended in particular to connect a tool, in particular the aforementioned tool, which is free of a thread and preferably has a tool interface, in particular the aforementioned tool interface, in particular a tool hub, in particular the aforementioned tool hub, to a quick-clamping device of a tool holder, to a tool holder, in particular the aforementioned tool holder, of a machine tool, in particular the aforementioned machine tool, which is free of a quick-clamping device corresponding to the tool interface of the tool and in particular has a thread, preferably an external thread, for a tool connection.
The machine tool is designed in particular as a rotary machine tool. The machine tool is preferably designed as a hand-held machine tool. Preferably, the machine tool is designed as an angle grinder. Alternatively, however, it is also conceivable that the machine tool is designed as a screwing machine, as a drilling machine, as a hand-held circular saw, as a grinding machine or as another hand-held machine tool which appears to a skilled person to be useful, as a gardening tool, for example as a lawn mower, as a power cutter or as another rotary machine tool which appears to a skilled person to be useful. The tool holder is in particular a part, preferably a sub-assembly, of the machine tool, which is preferably provided for holding, in particular fastening, the tool to the machine tool, preferably via the machine tool device. In particular, the tool holder is provided for coupling the tool to a drive unit of the machine tool via an output gear of the machine tool, in particular via a drive train of the machine tool. The drive unit has, for example, an electric motor or similar. Alternatively or additionally, it is conceivable that the drive unit has a pneumatic drive. An object being provided for a specific function is preferably to be understood to mean that the object fulfils and/or carries out this specific function in at least one application and/or operating state.
An “operating state” is preferably to be understood as a state in which the machine tool device is ready for operation for a turning operation of the tool and/or a turning operation and/or is at least coupled to the tool, the drive unit and/or the machine tool and/or is in a turning operation in which the machine tool device, in particular the driver unit and/or the fastening unit, is set in rotation, preferably by the drive unit of the machine tool. The tool holder preferably has an axis of rotation. In particular, the tool holder can be driven to rotate about the axis of rotation, preferably by the drive unit.
In particular, the machine tool device is designed to transmit torque from the tool holder to the tool. The machine tool device, in particular the driver unit and/or the fastening unit, preferably has an axis of rotation about which the machine tool device, in particular the driver unit and/or the fastening unit, is preferably rotatable in at least one operating state, in particular in a state driven by the drive unit. The axis of rotation of the machine tool device preferably runs at least essentially parallel to the axis of rotation of the tool holder. The term “substantially (in) parallel” should in particular in this context be understood to mean an orientation of a direction relative to a reference direction, in particular in a plane, wherein the direction has a deviation from the reference direction of in particular less than 8°, advantageously less than 5°, and particularly advantageously less than 2°. Preferably, the axis of rotation of the machine tool device is congruent with the axis of rotation of the tool holder, in particular at least in an operating state. The axis of rotation of the driver unit runs at least essentially parallel to the axis of rotation of the fastening unit, particularly in a state connected to the fastening unit. Preferably, the axis of rotation of the driver unit is congruent with the axis of rotation of the fastening unit when the driver unit is connected to the fastening unit.
The tool preferably has a tool axis of rotation. In particular via the tool holder and the machine tool device, the tool can be driven, preferably at least in one operating state, to rotate about the tool axis of rotation, in particular by the drive unit. In particular, the tool axis of rotation runs at least substantially parallel to the axis of rotation of the tool holder and/or to the axis of rotation of the machine tool device, in particular the axis of rotation of the driver unit and/or the axis of rotation of the fastening unit, preferably at least in a state of the tool arranged on the tool holder, preferably at least in an operating state. The tool axis of rotation is in particular congruent with the axis of rotation of the tool holder and/or the axis of rotation of the machine tool device, in particular the axis of rotation of the driver unit and/or the axis of rotation of the fastening unit, preferably at least in a state of the tool arranged on the tool holder, preferably at least in an operating state.
The fastening unit is preferably provided for axial fastening of the tool to the tool holder with respect to the axis of rotation of the tool and/or the tool holder. The fastening unit preferably has a fastening element corresponding to the tool holder, preferably a thread, in particular an internal thread. The fastening unit is preferably designed like a screw nut, in particular as a screw nut. The fastening unit, in particular the fastening element, is preferably intended to interact with the thread of the tool holder in order to fasten the machine tool device, in particular the fastening unit and/or the driver unit, to the tool holder.
It is further proposed that the fastening unit can be fastened to the tool holder by a movement, in particular a rotation, of the driver unit, preferably during a movement, in particular rotation, of the driver unit relative to the tool holder. A particularly convenient mounting and unmounting of the machine tool device to/from the tool holder can be achieved. Advantageously, a particularly compact machine tool device can be provided. In particular, a movement, especially a rotation, of the driver unit, preferably relative to the tool holder, about the axis of rotation of the driver unit allows the fastening unit to be moved about the axis of rotation of the fastening unit. Preferably, a torque can be transmitted to the fastening unit via the driver unit in order to fasten the fastening unit to the tool holder. In particular, the thread of the fastening unit can be fastened to the tool holder, in particular to the thread of the tool holder, or detached from the tool holder, in particular from the thread of the tool holder, by a movement, preferably a rotation, of the driver unit, preferably relative to the tool holder.
It is further proposed that the driver unit has a mounting interface which is intended to cooperate with a mounting tool to generate a movement of the driver unit for fastening the fastening unit to the tool holder. A particularly convenient mounting of the machine tool device on the tool holder can be achieved. A particularly reliable connection of the machine tool device and in particular the tool with a tool holder can be realized. A particularly high level of occupational safety can be achieved. The mounting tool can be, for example, a two-hole wrench, an open-end wrench, a socket or any other mounting tool that would appear useful to a skilled person. In particular, the mounting tool is designed to correspond to the mounting interface. The mounting interface preferably has a hexagonal mounting contour, which is intended in particular to interact with the mounting tool. Alternatively, it is also conceivable that the mounting interface has only two parallel or angled mounting surfaces, a square mounting contour or the like for interaction with the mounting tool. The mounting interface is arranged in particular on a side of the tool facing the tool holder, preferably at least in an operating state. The mounting interface is preferably arranged on a side of the driver unit that is remote from the fastening unit. The mounting interface is preferably arranged on the base body of the driver unit. The mounting interface is preferably formed in one piece with the base body. Alternatively or additionally, it is conceivable that the fastening unit has a mounting interface. The mounting interface of the fastening unit is designed, for example, in the same way as the mounting interface of the driver unit or alternatively differently from the mounting interface of the driver unit.
It is also proposed that the driver unit has at least one driver element, which is provided for a rotationally fixed connection with the fastening unit and with the tool. Advantageously, torque can easily be transmitted from the driver unit to the fastening unit and the tool. Advantageously, a particularly cost-effective production of the driver unit can be realized. A particularly compact machine tool device, in particular a particularly compact driver unit, can be provided. The driver unit preferably has several driver elements. Alternatively, it is conceivable that the at least one driver element of the driver unit is provided only for a rotationally fixed connection with the fastening unit or the tool. Alternatively or additionally, it is conceivable that the driver unit has at least one further driver element, which is provided for torque transmission from the driver unit to the fastening unit, in particular at least in a state of the driver unit connected to the fastening unit, and/or to the tool, preferably at least in an operating state. The at least one driver element of the driver unit is provided in particular for torque transmission from the driver unit to the tool, in particular at least in an operating state. The at least one driver element of the driver unit is preferably provided for torque transmission from the driver unit to the fastening unit, in particular at least in a state of the driver unit connected to the fastening unit, preferably at least in an operating state. The at least one driver element of the driver unit is preferably designed as a positive locking element, for example as a projection, a recess or the like. The at least one driver element of the driver unit is in particular part of the positive locking unit. The positive locking unit is preferably arranged partly on the driver unit and partly on the fastening unit. It is also conceivable that the driver element of the driver unit is designed as a latching element, for example as a latching recess, a latching hook, a latching lug or the like. The at least one driver element is aligned axially in particular. The tool preferably has at least one driver element, in particular one that corresponds to the at least one driver element of the driver unit. A number of driver elements of the driver unit preferably corresponds to a number of driver elements of the tool. Alternatively, however, it is also conceivable that a number of driver elements of the driver unit is different from a number of driver elements of the tool. It is conceivable that the driver element of the tool is part of a tool interface, in particular a tool hub, of the tool. The machine tool device, preferably the driver unit and/or the fastening unit, is/are intended in particular for arrangement on the tool interface, preferably the tool hub, of the tool. The machine tool device, in particular the driver unit and/or the fastening unit, is/are preferably arranged at the tool interface, in particular at the tool hub, in a state connected to the tool. In particular, a torque transmission from the driver unit, in particular the mounting interface, to the fastening unit can be transmitted via the at least one driver element of the driver unit, in particular for mounting or unmounting the machine tool device on the tool holder. The at least one driver element of the driver unit is arranged in particular on the base body of the driver unit. The at least one driver element of the driver unit is preferably formed in one piece with the base body. The fastening unit preferably has at least one driver element, in particular one that corresponds to the at least one driver element of the driver unit. A number of driver elements of the fastening unit preferably corresponds to a number of driver elements of the driver unit and/or a number of driver elements of the tool. Alternatively, however, it is also conceivable that a number of driver elements of the fastening unit is different from a number of driver elements of the tool and/or driver elements of the driver unit. The driver element of the fastening unit is preferably formed in one piece with a fastening base body of the fastening unit. The fastening element of the fastening unit is preferably formed in one piece with the fastening base body. The at least one driver element of the fastening unit is in particular part of the positive locking unit. In particular, the driver elements of the fastening unit and the driver unit engage with one another when the fastening unit and the driver unit are in a connected state, preferably to form a rotationally fixed connection between the driver unit and the fastening unit. The driver elements of the tool and the driver unit engage with one another in particular in a connected state of the tool and the driver unit, preferably at least in an operating state, preferably to form a rotationally fixed connection between the driver unit and the tool.
It is further proposed that the machine tool device has at least one axial locking element, in particular an O-ring, for an axial locking of a connection of the fastening unit to the driver unit, in particular one that can be released without tools. Advantageously, the fastening unit and the driver unit can be connected to each other in a particularly simple and captive manner. Advantageously, it is also possible to attach the fastening unit and the driver unit to the tool when the tool is detached from the tool holder. A particularly high level of user comfort, especially ease of mounting, can be realized. The axial locking element is preferably designed as a rubber-elastic O-ring. Alternatively, it is conceivable that the axial locking element is designed as a wire ring, in particular an open one, or similar. Alternatively, however, it is also conceivable that the fastening unit and/or the driver unit has at least one, preferably elastically deformable and/or deflectable, latching projection, latching recess or the like for axially locking a connection between the fastening unit and the driver unit, which can be released, in particular without tools. Furthermore, it is alternatively or additionally conceivable that the machine tool device has a magnet unit for detachable axial locking of a connection between the fastening unit and the driver unit. It is conceivable, for example, that the material of the driver unit and the fastening unit is such that a connection of the fastening unit to the driver unit can be detachably and axially locked by a magnetic interaction, in particular by means of the magnetic unit of the driver unit with the fastening unit. It is also conceivable that the material of the axial locking element is designed in such a way, in particular magnetically, that a connection of the fastening unit to the driver unit can be detachably locked axially via the axial locking element by a magnetic interaction of the axial locking element with the driver unit and/or with the fastening unit. In this context, “detachable” is to be understood in particular as “non-destructively separable”. In particular, the axial locking element is provided for a detachable axial locking of a connection of the fastening unit to the driver unit with respect to the axis of rotation of the machine tool device, preferably the axis of rotation of the driver unit and/or the axis of rotation of the fastening unit. Preferably, the machine tool device has only the one axial locking element. Alternatively, however, it is also conceivable that the machine tool device has a plurality of axial locking elements for releasable axial locking of a connection between the fastening unit and the driver unit. The axial locking element can preferably be detachably attached to the driver unit and/or the fastening unit, in particular without tools. Preferably, the fastening unit has a locking element holder, preferably a recess, a projection or the like, for holding the at least one axial locking element. The axial locking element is preferably arranged on the locking element holder in at least one operating state. Alternatively, however, it is also conceivable that the driver unit has a locking element holder for holding the at least one axial locking element. Furthermore, it is alternatively conceivable that the axial locking element is formed in one piece with the driver unit or the fastening unit, in particular at least a part of the driver unit, preferably the base body, or at least a part of the fastening unit, preferably the fastening base body of the fastening unit. Alternatively, it is also conceivable that the machine tool device is free of an axial locking element. The axial locking element preferably encloses the axis of rotation of the fastening unit at least partially at least in a state arranged on the fastening unit, in particular in an angular range of at least 45°, preferably at least 90°, preferably at least 135° and particularly preferably at least 180°, in particular at least viewed in a plane extending perpendicular to the axis of rotation of the fastening unit. The axial locking element preferably encloses the axis of rotation of the fastening unit at least substantially completely, in particular in an angular range of at least 180°, preferably of at least 270°, preferably of at least 305° and particularly preferably of at least 350°, in particular at least viewed in a plane extending perpendicular to the axis of rotation of the fastening unit, at least in a state arranged on the fastening unit. The axial locking element particularly preferably completely surrounds the axis of rotation of the fastening unit, at least in a state arranged on the fastening unit, in particular at least viewed in a plane extending perpendicular to the axis of rotation of the fastening unit.
It is also proposed that the driver unit and the fastening unit have a fit to each other that functions according to the poka-yoke principle. It is advantageous to counteract incorrect mounting of the machine tool device. The mounting unit can be mounted to the driver unit particularly easily and conveniently. A proper connection between the driver unit and the fastening unit can be ensured. The fit is formed in particular by the positive locking unit, especially the driver elements of the fastening unit and the driver unit.
Furthermore, it is proposed that the driver unit and the fastening unit are designed in one piece. Advantageously, a machine tool device for connecting a tool to a tool holder of a machine tool can be provided with a particularly small number of components. Advantageously, a particularly simple mounting and/or unmounting of the machine tool device can be achieved. Particularly simple and/or convenient maintenance of the machine tool device can be realized. A particularly robust machine tool device can be advantageously provided. In particular, the driver unit is designed in one piece, preferably as a single component. In particular, the fastening unit is designed in one piece, preferably as a single component. Particularly preferably, the machine tool device has only three components, in particular those formed in one piece, in particular the fastening unit, the driver unit and the axial locking element. Alternatively, it is also conceivable that the machine tool device has only two components, in particular the driver unit and the fastening unit. However, it is also conceivable that the machine tool device has more than three components.
Furthermore, a tool unit with a tool, in particular the aforementioned tool, in particular a brush, and with the machine tool device is proposed. Such a design of the tool unit enables particularly flexible use of the tool. Advantageously, the tool can be reliably connected to different tool holders. Advantageously, it is at least partially possible to avoid having to purchase tools with different tool hubs in order to be able to operate them with different tool holders. Costs can be saved advantageously.
It is also proposed that the machine tool device can be detachably attached to the tool, in particular detachable without tools. Advantageously, the machine tool device can be attached to the tool so that it cannot be lost. Advantageously, the tool can be adapted particularly conveniently and/or quickly to different tool holders. Advantageously, the machine tool device can be removed from a tool particularly conveniently and quickly. A particularly high level of user comfort can be achieved. Preferably, the machine tool device can be attached to the tool, preferably detachably, by connecting the driver unit to the fastening unit, preferably via the axial locking element. The tool, in particular the tool interface, preferably the tool hub, is preferably arranged between the driver unit and the fastening unit in a state connected to the machine tool device. In particular, at least a part of the fastening unit and at least a part of the driver unit, preferably the flange and/or the mounting interface, are arranged on opposite sides of the tool, in particular the tool interface.
Furthermore, a machine tool system with a machine tool, in particular the aforementioned machine tool, in particular an angle grinder, and with the tool unit is proposed. Such a design of the machine tool system enables a particularly high degree of flexibility when using different tools. Advantageously, tools with different tool interfaces, in particular tool hubs, can be used with the machine tool. A particularly cost-saving machine tool system can be made available. It is also conceivable that the machine tool system is designed without a tool, and in particular has only the machine tool and the machine tool device.
The machine tool device, the tool unit and/or the machine tool system should not be limited to the application and embodiment described above. In particular, the machine tool device, the tool unit and/or the machine tool system can have a number of individual elements, components and units other than a number specified herein in order to fulfill a mode of operation described herein. Moreover, regarding the ranges of values indicated in this disclosure, values lying within the aforementioned limits are also intended to be considered as disclosed and usable as desired.
Further advantages follow from the description of the following drawings. The drawing shows an embodiment example of the disclosure. The drawing, the description, and the claims contain numerous features in combination. The skilled person will appropriately also consider the features individually and combine them into additional advantageous combinations.
Shown are:
The tool unit 30 has a machine tool device 10 for connecting a tool 12 to a tool holder 14 of the machine tool 16. The tool holder 14 is a part, preferably a sub-assembly, of the machine tool 16, which is preferably provided for holding, in particular fastening, the tool 12 to the machine tool 16, preferably via the machine tool device 10. The tool 12 is designed as a brush. Alternatively, however, it is also conceivable that the tool 12 is designed as a cut-off wheel, a polishing disc, a saw blade, a drill bit, a backing pad or any other tool that would appear useful to a person skilled in the art.
The tool holder 14 is provided for coupling the tool 12 to a drive unit (not shown here) of the machine tool 16 via a drive gear of the machine tool 16, in particular via a drive train of the machine tool 16. The drive unit has, for example, an electric motor or similar. Alternatively or additionally, it is conceivable that the drive unit has a pneumatic drive. The tool holder 16 has an axis of rotation 36. The tool holder 14 can be driven to rotate about the axis of rotation 36, preferably by the drive unit.
The machine tool device 10 is a tool adapter. The machine tool device 10 is designed to transmit torque from the tool holder 14 to the tool 12. The machine tool device 10 has at least one driver unit 18 for a rotationally fixed connection with the tool 12.
The machine tool device 10 has at least one fastening unit 20 for axially fastening the tool 12 to the tool holder 14. The fastening unit 20 is provided for axial fastening of the tool 12 to the tool holder 14 with respect to an axis of rotation of the tool 12 and/or the tool holder 14. The fastening unit 20 preferably has a fastening element 62 corresponding to the tool holder 14, preferably a thread, in particular an internal thread. The fastening element 62 is designed as an M14 thread in this example. Alternatively, however, it is also conceivable that the fastening element 62 is designed as a thread other than an M14 thread. The fastening unit 20 is preferably designed like a screw nut, in particular as a screw nut.
The fastening unit 20 has a tool holding element 68, in particular a projection. The tool holding element 68 is in contact with the tool 12 at least in a state of the machine tool device 10 attached to the tool 12, preferably at least in an operating state. The tool holding element 68 is intended to lock the tool 12 in the axial direction, in particular with respect to the axis of rotation 36 of the tool holder 14.
The machine tool device 10 has a positive locking unit 22, by means of which the driver unit 18 and the fastening unit 20 can be connected to one another in a rotationally fixed manner via a positive locking. In a state connected to the fastening unit 20, the driver unit 18 is non-rotatably connected to the fastening unit 20, preferably via the positive locking unit 22. The driver unit 18 is connected to the fastening unit 20 at least in one operating state, preferably non-rotatably, preferably via the positive locking unit 22. In a state connected to the tool 12, the driver unit 18 is non-rotatably connected to the tool 12. At least in one operating state, the driver unit 18 is connected to the tool 12 so that it cannot rotate. The machine tool device 10, in particular the driver unit 18 and/or the fastening unit 20, is/are non-rotatably connected to the tool 12 in a state connected to the tool 12, preferably at least in an operating state.
The machine tool device 10 has a flange 46. In a state of the machine tool device 10 attached to the tool holder 14, in particular at least in the operating state, the flange 46 rests against a bearing surface 48 of the tool holder 14. The driver unit 18 has a base body 50. The flange 46 is arranged on the driver unit 18, in particular on the base body 50 of the driver unit 18. The flange 46 is formed in one piece with the base body 50. The base body 50 has a recess 58, which is arranged in the center in particular. A thread 54 of the tool holder 14 is arranged in the recess 58 of the driver unit 18, at least in one operating state.
The tool 12 has a tool interface 52, in particular a tool hub, for connection to a tool holder of a machine tool. The tool interface 52, in particular the tool hub, of the tool 12 is provided for a force-locking and/or positive locking connection with a quick-clamping device of a tool holder of a further machine tool, in particular one that is different from the above-mentioned machine tool 16. The quick-clamping device is preferably free of a thread. The tool interface 52, in particular the tool hub, of the tool 12 is free of a thread. The tool holder 14 of the machine tool 16 is free of a quick-clamping device.
The tool holder 14 has the thread 54, in particular an external thread, for a connection with a further tool, in particular different from the above-mentioned tool 12, which has a thread, preferably an internal thread, corresponding to the thread 54 of the tool holder 14. The machine tool device 10, preferably the driver unit 18 and/or the fastening unit 20, is/are intended to be arranged at the tool interface 52, preferably the tool hub, of the tool 12. The machine tool device 10, in particular the driver unit 18 and/or the fastening unit 20, is/are arranged at the tool interface 52, in particular at the tool hub, in a state connected to the tool 12.
The machine tool device 10 is intended to connect a tool, in particular the tool 12, which is free of a thread and has a tool interface, in particular the aforementioned tool interface, for a connection to a quick-clamping device of a tool holder, to a tool holder 14, in particular the aforementioned tool holder 14, of a machine tool 16, in particular the aforementioned machine tool 16, which is free of a quick-clamping device corresponding to the tool interface 52 of the tool 12 and in particular has a thread 54, in particular the aforementioned thread 54, preferably an external thread, for a tool connection.
The machine tool device 10 has an axis of rotation 38 about which the machine tool device 10, in particular the driver unit 18 and/or the fastening unit 20, preferably rotates in at least one operating state, in particular in a state driven by the drive unit. The axis of rotation 38 of the machine tool device 10 runs at least substantially parallel to the axis of rotation 36 of the tool holder 14. The axis of rotation 38 of the machine tool device 10 extends congruently with the axis of rotation 36 of the tool holder 14, in particular at least in an operating state.
The driver unit 18 has an axis of rotation 40. In a state of the driver unit 18 connected to the fastening unit 20, the axis of rotation 40 of the driver unit 18 extends at least substantially parallel to an axis of rotation 42 of the fastening unit 20. In a state of the driver unit 18 connected to the fastening unit 20, the axis of rotation 42 of the driver unit 18 runs congruently with the axis of rotation 42 of the fastening unit 20. The axis of rotation 38 of the machine tool device 10 corresponds, in particular at least in a state of the fastening unit 20 connected to the driver unit 18, to the axis of rotation 40 of the driver unit 18 and the axis of rotation 42 of the fastening unit 20.
The tool 12 has a tool axis of rotation 44. The tool 12 can be driven to rotate about the tool axis of rotation 44, preferably at least in one operating state, via the tool holder 14 and the machine tool device 10, in particular by the drive unit. The tool axis of rotation 44 extends at least substantially parallel to the axis of rotation 36 of the tool holder 14 and/or to the axis of rotation of the machine tool device 10, in particular the axis of rotation 40 of the driver unit 18 and/or the axis of rotation 42 of the fastening unit 20, preferably at least in a state of the tool 12 arranged on the tool holder 14, preferably at least in an operating state. The tool axis of rotation 44 extends congruently with the axis of rotation 36 of the tool holder 14 and/or with the axis of rotation 38 of the machine tool device 10, in particular the axis of rotation 40 of the driver unit 18 and/or the axis of rotation 42 of the fastening unit 20, preferably at least in a state of the tool 12 arranged on the tool holder 14, preferably at least in an operating state.
The tool unit 30 has the tool 12. The machine tool device 10 can be detachably attached to the tool 12, in particular detachable without tools. The machine tool device 10 can be fastened to the tool 12, preferably detachably, by connecting the driver unit 18 to the fastening unit 20, preferably via an axial locking element 28 of the machine tool device 10.
The tool 12, in particular the tool interface 52, preferably the tool hub, is arranged between the driver unit 18 and the fastening unit 20 in a state connected to the machine tool device 10. At least a part of the fastening unit 20 and at least a part of the driver unit 18, preferably the flange 46 and/or a mounting interface 24, are arranged on opposite sides of the tool 12, in particular the tool interface 52, in particular at least in a state of the machine tool device 10 arranged on the tool 12.
The fastening unit 20 can be fastened to the tool holder 14 by a movement, in particular a rotation, of the driver unit 18. The driver unit 18 has the mounting interface 24, which is intended to cooperate with a mounting tool to generate a movement of the driver unit 18 for fastening the fastening unit 20 to the tool holder 14. The mounting tool is preferably an open-end wrench. Alternatively, however, it is also conceivable that the mounting tool is a two-hole wrench, a socket or another mounting tool that would appear useful to a skilled person. In particular, the mounting tool is designed to correspond to the mounting interface 24.
The mounting interface 24 has a hexagonal mounting contour 56, which is intended in particular to interact with the mounting tool. In this example, the mounting interface 24 has a width across flats of 27 mm. Alternatively, it is conceivable that the mounting interface 24 has a width across flats different from 27 mm. For example, it is also conceivable that the width across flats of the mounting interface 24 is in a range of between 17 mm and 30 mm, preferably at least 20 mm, preferably at least 24 mm and at most 30 mm. However, it is also conceivable that a width across flats of the mounting interface 24 is smaller than 17 mm or larger than 30 mm.
Alternatively, it is also conceivable that the mounting interface 24 has only two parallel or angled mounting surfaces, a square mounting contour or the like for interaction with the mounting tool. The mounting interface 24 is arranged on a side of the tool 12 facing the tool holder 14, preferably at least in an operating state. The mounting interface 24 is arranged on a side of the driver unit 18 remote from the fastening unit 20. The mounting interface 24 is arranged on the base body 50 of the driver unit 18. The mounting interface 24 is formed in one piece with the base body 50.
The driver unit 18 has several driver elements 26, four in this example, which are provided for a rotationally fixed connection with the fastening unit 20 and with the tool 12. Alternatively, however, it is conceivable that the driver unit 18 has a number of driver elements 26 different from four, for example only one driver element 26, two driver elements 26, three driver elements 26 or more than four driver elements 26. The driver elements 26 of the driver unit 18 are arranged uniformly, in particular around the axis of rotation 40 of the driver unit 18. The driver elements 26 of the driver unit 18 are arranged at a distance from one another.
Alternatively, it is conceivable that the driver elements 26 of the driver unit 18 are provided only for a rotationally fixed connection with the fastening unit 20 or the tool 12. Alternatively or additionally, it is conceivable that the driver unit 18 has at least one further driver element which is provided for torque transmission from the driver unit 18 to the fastening unit 20, in particular at least in a state of the driver unit 18 connected to the fastening unit 20, and/or to the tool 12, preferably at least in an operating state.
The driver elements 26 of the driver unit 18 are provided for torque transmission from the driver unit 18 to the tool 12, in particular at least in an operating state. The driver elements 26 of the driver unit 18 are provided for torque transmission from the driver unit 18 to the fastening unit 20, in particular at least in a state of the driver unit 18 connected to the fastening unit 20, preferably at least in an operating state. The driver elements 26 of the driver unit 18 are designed as positive locking elements, for example as a projection, a recess or the like. The driver elements 26 of the driver unit 18 are part of the positive locking unit 22. The positive locking unit 22 is arranged partly on the driver unit 18 and partly on the fastening unit 20. It is also conceivable that the driver elements 26 of the driver unit 18 are designed as latching elements, for example as latching recesses, latching hooks, latching lugs or the like.
The tool 12 has at least one driver element (not shown here) that corresponds in particular to the driver elements 26 of the driver unit 18. A number of driver elements 26 of the driver unit 18 preferably corresponds to a number of driver elements of the tool 12. Alternatively, however, it is also conceivable that a number of driver elements 26 of the driver unit 18 is different from a number of driver elements of the tool 12. It is conceivable that the at least one driver element of the tool 12 is part of the tool interface 52, in particular the tool hub, of the tool 12. The driver elements 26 of the driver unit 18 can be used to transmit torque from the driver unit 18, in particular the mounting interface 24, to the fastening unit 20, in particular for mounting or unmounting the machine tool device 10 on the tool holder 14. The driver elements 26 of the driver unit 18 are arranged on the base body 50 of the driver unit 18. The driver elements 26 of the driver unit 18 are formed in one piece with the base body 50.
The fastening unit 20 has several fastening elements 34, here exemplarily four, in particular corresponding to the driver elements 26 of the driver unit 18. A number of driver elements 34 of the fastening unit 20 preferably corresponds to a number of driver elements 26 of the driver unit 18 and/or a number of driver elements of the tool 12. Alternatively, however, it is also conceivable that a number of driver elements 34 of the fastening unit 20 is different from a number of driver elements of the tool 12 and/or of driver elements 26 of the driver unit 18. The driver elements 34 of the fastening unit 20 are formed in one piece with a fastening base body 60 of the fastening unit 20. The fastening element 62 of the fastening unit 20 is formed in one piece with the fastening base body 60. The driver elements 34 of the fastening unit 20 are part of the positive locking unit 22. The driver elements 34 of the fastening unit 20 are arranged uniformly, in particular around the axis of rotation 42 of the fastening unit 20. The driver elements 34 of the fastening unit 20 are arranged at a distance from one another.
The machine tool device 10 has at least the axial locking element 28, in particular an O-ring, for an axial locking of a connection of the fastening unit 20 to the driver unit 18, in particular one that can be released without tools. The axial locking element 28 is designed as a rubber-elastic O-ring. Alternatively, however, it is also conceivable that the fastening unit 20 and/or the driver unit 18 has at least one, preferably elastically deformable and/or deflectable, latching projection, latching recess or the like for axially locking a connection of the fastening unit 20 to the driver unit 18, which can be released, in particular without tools.
The axial locking element 28 is provided for a detachable axial locking of a connection of the fastening unit 20 to the driver unit 18 with respect to the axis of rotation 38 of the machine tool device 10, preferably the axis of rotation 40 of the driver unit 18 and/or the axis of rotation 42 of the fastening unit 20. The machine tool device 10 has only the one axial locking element 28. Alternatively, however, it is also conceivable that the machine tool device 10 has a plurality of axial locking elements 28 for releasable axial locking of a connection between the fastening unit 20 and the driver unit 18. The axial locking element 28 can be detachably fastened to the fastening unit 20, in particular to the fastening base body 60, in particular without tools. Alternatively, however, it is also conceivable that the axial locking element 28 can be detachably attached to the driver unit 18, in particular without tools.
The fastening unit 20 has a locking element holder 64, preferably a recess, for holding the at least one axial locking element 28. The axial locking element 28 is arranged on the locking element holder 64 in at least one operating state.
The driver unit 18 has a projection 66. The projection 66 is intended to cooperate with the axial locking element 28 to form a detachable axial locking of a connection between the fastening unit 20 and the driver unit 18.
Alternatively, however, it is also conceivable that the driver unit 18 has a locking element holder for holding the at least one axial locking element 28. Furthermore, it is alternatively conceivable that the axial locking element 28 is formed in one piece with the driver unit 18 or the fastening unit 20, in particular at least a part of the driver unit 18, preferably the base body 50, or at least a part of the fastening unit 20, preferably the fastening base body 60 of the fastening unit 20. Alternatively, it is also conceivable that the machine tool device 10 is free of an axial locking element 28. The driver unit 18 and the fastening unit 20 have a fit to each other that functions according to the poka-yoke principle.
The driver unit 18 and the fastening unit 20 are designed in one piece. The machine tool device 10 has only three, in particular one-piece, components, in particular the fastening unit 20, the driver unit 18 and the axial locking element 28. Alternatively, it is also conceivable that the machine tool device 10 has only two components, in particular the driver unit 18 and the fastening unit 20. However, it is also conceivable that the machine tool device 10 has more than three components.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2022 212 749.8 | Nov 2022 | DE | national |
