Patent Application
20250091175
A tool interface device for an insertion tool for connecting the insertion tool to a tool holder of a machine tool has already been proposed, having at least one connection interface for a frictional and/or positive connection to a quick-release device of the tool holder, wherein the connection interface comprises a recess at least partially bounded by a boundary edge of the connection interface, and wherein the connection interface comprises at least one securing element, in particular a wing clamp, for axially securing to the quick-release device and for transmitting a torque when the connection interface is in a state arranged on the quick-release device, said element at least partially forming the boundary edge.
The invention relates to a tool interface device for an insertion tool, in particular an insertion tool hub, for connecting the insertion tool to a tool holder of a particularly portable machine tool, having at least one connection interface for a frictional and/or positive connection to a quick-release device of the tool holder, wherein the connection interface comprises a recess at least partially bounded by a boundary edge of the connection interface, and wherein the connection interface comprises at least one securing element, in particular a wing clamp, for axially securing to the quick-release device and for transmitting a torque when the connection interface is in a state arranged on the quick-release device, said element at least partially forming the boundary edge.
It is proposed that the connection interface comprises at least one tool mounting coding element spaced apart from the at least one securing element at least partially forming the boundary edge and being intended to interact with at least one mounting coding element of the tool holder in a state where the connection interface is arranged on the tool holder.
The connection interface preferably has a tool rotation axis. In particular, in a state of the connection interface arranged on the quick-release device, the tool rotation axis coincides with an output axis of the machine tool, particularly an output spindle of the machine tool. Preferably, the tool rotation axis is at least substantially perpendicular to a main extension plane of the tool interface device, in particular a main extension plane of the connection interface. A “main extension plane” of a structural unit or an element can in particular be understood to be a plane which is parallel to a largest side surface of a smallest possible notional cuboid which just completely encloses the structural unit, and in particular extends through the midpoint of the cuboid. “Substantially perpendicular” can be understood to mean an orientation of a direction relative to a reference direction, wherein, in particular viewed in a projection plane, the direction and the reference direction enclose an angle of 90° and the angle has a maximum deviation of in particular less than 8°, advantageously less than 5° and particularly advantageously less than 2°. The tool rotation axis preferably passes through a geometrical center point of the recess of the connection interface, preferably at least substantially perpendicular to a main extension plane of the recess. Particularly in an operating state in state of the connection interface arranged on the machine tool, preferably on the tool holder, the tool interface device, particularly the connection interface, rotates and/or oscillates about the tool rotation axis.
The securing element is preferably designed as a clamping extension, in particular as a wing clamp. The securing element is preferably arranged adjacent to an outer boundary contour of the boundary edge of the connection interface boundary the recess of the connection interface, particularly when viewed along the circumferential direction of the connection interface. The circumferential direction of the connection interface preferably runs in a plane extending at least substantially perpendicular to the tool rotation axis of the connection interface. The outer boundary contour is preferably designed as a partial circle contour. When viewed along the circumferential direction of the connection interface, the securing element forms an inner boundary contour of the boundary edge. The inner boundary contour is preferably designed as a partial circle contour. In particular, the outer boundary contour is arranged on a circle that has a diameter that is greater than the diameter of a circle on which the inner boundary contour is arranged. The outer boundary contour is preferably arranged concentrically to the inner boundary contour around the tool rotation axis. The inner boundary contour is preferably arranged on a circle having a maximum diameter of between 17 mm and 18 mm. The outer boundary contour is preferably arranged on a circle that has a maximum diameter of 23 mm, wherein alternatively other dimensions that appear to be useful to a person skilled in the art are conceivable.
A main extension plane of the securing element is at least substantially parallel to the main extension plane of the connection interface. “Substantially parallel” can be understood here to mean an orientation of a direction relative to a reference direction, in particular in a plane, wherein the direction has a deviation relative to the reference direction that is in particular less than 8°, advantageously less than 5° and particularly advantageously less than 2°. The tool rotation axis preferably extends at least substantially perpendicular to the main extension plane of the securing element. The securing element extends in a plane that is at least substantially perpendicular to the tool rotation axis, preferably starting from the outer boundary contour to the inner boundary contour. The connection interface preferably comprises two, in particular three and preferably four securing elements arranged offset relative to each other along the circumferential direction. However, it is also conceivable that the connection interface comprises a number of securing elements other than two, three, or four, such as six, eight, twelve, or the like. In particular, the securing elements are arranged evenly distributed along the circumferential direction. However, it is also conceivable that the connection interface comprises a number of securing elements other than two, three or four, and/or that the securing elements are arranged unevenly distributed along the circumferential direction of the connection interface. The securing element(s) is/are preferably provided for a positive and/or frictional connection to the quick-release device along a direction running at least substantially parallel to the direction of the tool rotation axis and along a direction at least substantially perpendicular to the tool rotation axis.
Preferably, the quick-release device is fixed, in particular non-rotatably, on the machine tool, in particular on an output spindle of an output unit of the machine tool. Alternatively, it is conceivable that the quick-release device is detachably arranged on the machine tool, in particular on the output spindle. The quick-release device is preferably provided for fastening the tool interface device to the machine tool, in particular without tools. The tool interface device is preferably designed as an insertion tool hub. The tool interface device can be driven by the output spindle, preferably rotating or oscillating, in particular in a state of the tool interface device secured to the machine tool by means of the quick-release device. Axial securing of the tool interface device is provided in particular by securing the tool interface device along an axial direction of the output axis of the output spindle. The quick-release device, in particular when viewed in a plane extending at least substantially perpendicular to the output axis, has an outer contour designed to correspond with a contour of the connection interface resulting from the boundary contour of the connection interface.
Preferably, the output unit is configured to transmit a rotational and/or oscillating movement about the output axis to an insertion tool fixed to the output unit by means of the quick-release device that comprises the tool interface device. Preferably, the output unit is effectively connected to a drive unit of the machine tool in a manner already known to a person skilled in the art, in particular via at least one drive pinion of the drive unit. In particular, the output unit comprises at least one sleeve and/or at least one hollow shaft, in particular a hollow spindle, which forms the output spindle. The rotational and/or oscillating movement of the output unit can preferably be generated as a result of interaction between the output unit and the drive unit of the machine tool, which comprises at least one electric motor or the like. In a state of the tool interface device arranged on the quick-release device, the rotational and/or oscillating movement can preferably be transmitted to the tool interface device, in particular to the securing element, preferably by means of a torque transmitting element of the quick-release device.
Preferably, the tool mounting coding element is configured as a mechanical tool mounting coding element, such as a recess, protrusion, groove, land, embossment, or the like. However, it is also conceivable that the tool mounting coding element may be configured as an electronic tool mounting coding element, such as an RFID chip, an NFC chip, a radio wave evaluation device, an electronic reader (bar code reader, a data matrix code reader, etc.), or the like, or that the tool mounting coding element is configured as a combination of a mechanical and an electronic tool mounting coding element. Preferably, the tool mounting coding element is provided to interact with at least one mounting coding element of the tool holder, in particular in a state of the connection interface arranged on the tool holder, in accordance with a key/keyhole principle.
Preferably, the connection interface comprises a plurality of tool mounting coding elements, in particular at least two, preferably at least three, and in particular at least four. The connection interface preferably comprises an identical quantity of tool mounting coding elements depending upon a quantity of mounting coding elements of the tool holder. However, it is also conceivable that the connection interface has a quantity of tool mounting coding elements different from, in particular greater than, a quantity of mounting coding elements of the tool holder. Preferably, the at least one tool mounting coding element can be configured or act as a stress-relief notch, in particular in addition to a mounting coding function. Preferably, the at least one tool mounting coding element can be provided for centering the connection interface on the quick release device, in particular in addition to a mounting coding function. Preferably, a mechanical and/or electronic evaluation of the at least one tool mounting coding element for assembly and/or fastening of the connection interface to the tool holder must be provided, in particular by means of the at least one mounting coding element of the tool holder, preferably in order to enable assembly and/or fastening of the connection interface to the tool holder. It is conceivable that the at least one tool mounting coding element is provided for actuating, in particular for displacing, the at least one mounting coding element of the tool holder, in particular to enable assembly and/or fastening of the connection interface to the tool holder. In addition or alternatively, it is conceivable that the connection interface comprises at least one further tool mounting coding element, in particular an embossment, provided for actuating, in particular for displacing, at least one further mounting coding element of the tool holder, in particular to enable assembly and/or fastening of the connection interface to the tool holder.
Preferably, when viewed along the circumferential direction of the connection interface, the at least one tool mounting coding element is arranged spaced apart from the at least one securing element. Preferably, the at least one tool mounting coding element is arranged spaced apart from the securing element when viewed along the boundary edge. In particular, the at least one tool mounting coding element is arranged on a circle that is defined by the outer boundary contour of the boundary edge. Preferably, the at least one tool mounting coding element is arranged on the outer boundary contour. The at least one tool mounting coding element is preferably arranged at least substantially entirely outside the circle on which the inner boundary contour is arranged, in particular at least when viewed in a direction parallel to the tool rotation axis. The expression “at least substantially entirely” is understood to mean at least 50%, preferably at least 75%, and particularly preferably at least 90% of a total volume, a total extent, and/or a total mass of an object, in particular of the tool mounting coding element. The at least one tool mounting coding element is preferably arranged at least substantially entirely inside or outside the circle on which the outer boundary contour is arranged, in particular at least when viewed in a direction parallel to the tool rotation axis. For example, the at least one tool mounting coding element is arranged at least substantially between the circle on which the outer boundary contour is arranged and the circle on which the inner boundary contour is arranged, in particular at least when viewed in a direction parallel to the tool rotation axis. The at least one tool mounting coding element forms in particular an additional boundary contour. The additional boundary contour is preferably arranged at least substantially entirely outside the circle on which the inner boundary contour is arranged, in particular at least when viewed in a direction parallel to the tool rotation axis. The additional boundary contour is preferably arranged at least substantially entirely outside the circle on which the outer boundary contour is arranged, in particular at least when viewed in a direction parallel to the tool rotation axis. For example, the additional boundary contour is arranged at least substantially between the circle on which the outer boundary contour is arranged and the circle on which the inner boundary contour is arranged, in particular at least when viewed in a direction parallel to the tool rotation axis.
It is conceivable that the additional boundary contour forms a partial circle contour. In particular, the additional boundary contour is arranged on a circle that has a diameter greater than a diameter of the circle on which the inner boundary contour is arranged. It is conceivable that the diameter of the circle on which the additional boundary contour is arranged is greater or less than the diameter of the circle on which the outer boundary contour is arranged. For example, the diameter of the circle on which the additional boundary contour is arranged is less than the diameter of the circle on which the outer boundary contour is arranged and greater than the diameter of the circle on which the inner boundary contour is arranged.
By the configuration according to the invention, incorrect assembly of the tool interface device on the tool holder can be avoided as far as possible. Advantageously, an arrangement of tool interface devices, which are not suitable for a safe operation of the machine tool, can be counteracted on the tool holder. For example, an arrangement of a tool interface device provided for low maximum speed machine tools can be advantageously countered on a high maximum speed machine tool. A high level of operator safety can advantageously be realized.
It is further proposed that the connection interface comprises at least one further securing element, in particular a further wing clamp, for axially securing on the quick-release device and for a transmitting a torque in a state of the connection interface arranged on the quick-release device, which at least partially forms the boundary edge, wherein the at least one tool mounting coding element is arranged along the boundary edge in a central region between the securing element and the further securing element. The at least one further securing element is in particular at least substantially identical to the securing element. The statement that the two elements are “at least substantially identical” is understood, in particular, to mean a configuration identical for manufacturing-related differences of the two elements. Alternatively, it is also conceivable that the further securing element is configured differently from the securing element. The central region extends between the securing element and the further securing element along the circle on which the outer boundary contour is arranged, in particular starting from a center point on the circle on which the outer boundary contour is arranged. A maximum extent of the central region starting from the center point along the circle on which the outer boundary contour is arranged is preferably a maximum of 50%, preferably a maximum of 35%, and more preferably a maximum of 25% of a maximum distance of the securing element from the further securing element when viewed along the boundary edge, in particular the circle on which the outer boundary contour is arranged. The securing element and the further securing element are preferably arranged adjacent when viewed along the circumferential direction of the connection interface, in particular along the boundary edge. In particular, an area between the securing element and the further securing element arranged adjacent the securing element is free of other securing elements along the boundary edge. By means of the configuration according to the invention, a secure mounting or fastening coding can advantageously be achieved according to a key/keyhole principle.
Furthermore, it is proposed that the tool mounting coding element has a recess in the boundary edge. Preferably, the tool mounting coding element is formed as the recess. In particular, the additional boundary contour limits the recess of the tool mounting coding element. The additional boundary contour bounding the recess of the tool mounting coding element is preferably arranged at least substantially entirely outside the circle on which the outer boundary contour is arranged, in particular at least when viewed in a direction parallel to the tool rotation axis. The diameter of the circle on which the additional boundary contour that limits the recess of the tool mounting element is arranged is preferably greater than the circle on which the outer boundary contour is arranged. In particular, the additional boundary contour bounding the recess of the tool mounting coding element forms an outermost boundary contour of boundary edge. For example, the additional boundary contour bounding the recess of the tool mounting coding element at least partially has a curved path and/or at least partially has a straight-line, in particular polygonal, path. By means of the configuration according to the invention, a reliable and secure coding can advantageously be achieved. Advantageously, simply reliable and safe coding can be achieved by configuration.
In addition, it is proposed that the tool mounting coding element has a protrusion on the boundary edge, particularly in an alternative embodiment example. Preferably, the tool mounting element is formed as the protrusion. In particular, the protrusion of the tool mounting coding element forms the additional boundary contour. The protrusion, and preferably the additional boundary contour formed by the protrusion, is preferably arranged at least substantially entirely inside the circle on which the outer boundary contour is arranged, in particular at least when viewed in a direction parallel to the tool rotation axis. The protrusion, and in particular the additional boundary contour formed by the protrusion, is preferably arranged at least substantially entirely outside the circle on which the inner boundary contour is arranged, in particular at least when viewed in a direction parallel to the tool rotation axis. In particular, the protrusion, and preferably the additional boundary contour formed by the protrusion, is arranged at least substantially entirely between the circle on which the inner boundary contour is arranged and the circle on which the outer boundary contour is arranged, in particular at least when viewed in a direction parallel to the tool rotation axis. The diameter of the circle on which the additional boundary contour formed by the protrusion of the tool mounting element is arranged is preferably less than the circle on which the outer boundary contour is arranged. The diameter of the circle on which the additional boundary contour formed by the protrusion of the tool mounting element is arranged is preferably greater than the circle on which the inner boundary contour is arranged. For example, the additional boundary contour formed by the protrusion at least partially has a curved path and/or at least partially has a straight-line, in particular polygonal, path. By means of the configuration according to the invention, a reliable and secure coding can advantageously be achieved.
It is further proposed that the tool mounting coding element comprises a protrusion on the boundary edge having an axially protruding component, in particular the aforementioned one. In particular, the tool mounting coding element is configured as a protrusion having an axially protruding component. In particular, the securing element has a contact surface at least substantially parallel to the tool rotation axis. The contact surface is preferably provided to interact with the tool holder, in particular the quick-release device, in order to axially secure the connection interface to the tool holder, in particular the quick-release device. The protrusion projects in particular from a plane defined by the contact surface of the securing element. By means of the configuration according to the invention, a reliable and secure coding can advantageously be achieved.
It is further proposed that the tool interface device comprises a surface surrounding the connection interface, the main extension plane thereof being spaced apart from a main extension plane of the securing element, in particular that mentioned above, wherein the protrusion having an axially projecting component is arranged at least substantially entirely between the main extension plane of the surface surrounding the connection interface and the main extension plane of the securing element. By means of the configuration according to the invention, a reliable and secure coding can advantageously be achieved. Advantageously, damage to the protrusion having an axially projecting component of the tool mounting coding element can be simply countered in the configuration.
Furthermore, it is proposed that the at least one tool mounting coding element has a maximum extent along a radial axis no greater than a value of a maximum height of the securing element along a radial axis. Preferably, the at least one tool mounting coding element spaced apart from the securing element has a maximum extent along a direction transverse to, in particular at least substantially perpendicular to, the tool rotation axis, in particular the radial axis of the connection interface, on which is the same as a maximum distance between the circle, on which the inner boundary contour is arranged, and the circle on which the outer boundary contour is arranged, is greater than or less than the maximum distance between the circle on which the inner boundary contour is arranged and the circle on which the outer boundary contour is arranged. By means of the configuration according to the invention, a reliable and secure coding can advantageously be achieved.
Furthermore, an insertion tool having a machine tool interface device according to the invention is proposed, in particular that previously mentioned. For example, the insertion tool is configured as a grinding disc, a cutting disc, a roughing disc, or the like. In particular, the machine tool interface device forms the insertion tool hub of the insertion tool. The tool interface device formed as an insertion tool hub can be connected to a tool base body of the insertion tool in a manner already known to a person skilled in the art, for example by means of a welded connection, by means of an adhesive connection, by means of a riveted connection, by means of a combination of at least two of the aforementioned connections or the like. Preferably, machining elements of the insertion tool are arranged on the tool base body, for example grinding elements or cutting elements. The machining elements can have any configuration of grinding elements or cutting elements that would appear to a person skilled in the art to be useful and, in particular, can be manufactured and/or arranged on the tool base body by means of manufacturing processes that are well known to a person skilled in the art. Advantageously, an insertion tool can be provided with a particularly high mounting reliability. Advantageously, an arrangement of tool interface devices, which are not suitable for a safe operation of the machine tool, can be counteracted on the tool holder. A high level of operator safety can advantageously be realized.
Further, a machine tool system is proposed, having at least one insertion tool according to the invention, and having at least one, in particular the aforementioned machine tool, wherein the machine tool comprises at least one, in particular the aforementioned tool holder having a, in particular the aforementioned quick-release device on which the insertion tool is arranged. The machine tool is preferably designed as a portable machine tool. The term “portable machine tool” is understood in this context to mean a machine tool for machining workpieces and able to be transported by an operator without the need for a transport machine. In particular, the portable machine tool has a mass that is less than 40 kg, preferably less than 10 kg, and more preferably less than 5 kg. Preferably, the portable machine tool is designed as an angle grinder. However, it is also conceivable that the portable machine tool has another configuration that would appear useful to a person skilled in the art, such as a configuration as a circular saw, as an oscillating machine tool, as a grinding machine or the like. Alternatively, it is also conceivable that the machine tool is configured as a stationary machine tool. The drive unit is arranged in a housing of the machine tool, in particular at least partially in a part of the housing in which the output unit of the tool holder is also arranged. The drive unit preferably has an axis of rotation that is at least substantially parallel, in particular coaxial, to the output axis of the output unit. The drive unit is particularly provided for driving the output unit in a manner already known to a person skilled in the art. The drive unit is preferably provided for directly driving the output spindle of the output unit. The output spindle may preferably be rotationally driven about the output axis of the output spindle by means of the drive unit. However, it is also conceivable that the output spindle may be driven in oscillation about the output axis by means of the drive unit. A rotor shaft of the electric motor of the drive unit is preferably connected to the output spindle in a rotationally fixed manner. However, it is also conceivable that the rotor shaft is connected to the output spindle via a belt drive, a gear transmission, or the like, for transmitting drive forces and/or drive torques in a manner already known to a person skilled in the art. The quick-release device preferably comprises at least one in particular the aforementioned torque transmission element, connected to the output spindle in a rotationally fixed manner and at least one securing element supported displaceably, in particular axially along the output axis. Preferably, the at least one mounting coding element of the tool holder is provided to encode an arrangement or abutting of the tool interface device, in particular the connection interface, at or on the tool holder. Preferably, the at least one mounting coding element of the tool holder is provided to encode an arrangement or abutting of the tool interface device, in particular the connection interface, at or on the tool holder according to a key/keyhole principle. Preferably, the at least one mounting coding element is configured as an axial coding element, in particular as an axial coding element acting along a direction at least substantially parallel to the output axis. Preferably, the at least one mounting coding element is provided to encode an axial insertion possibility of the tool interface device, in particular the connection interface, onto the quick-release device. The mounting coding element is preferably provided to at least avoid or prevent attachment of the tool interface device to the tool holder to the greatest possible extent in the absence of a corresponding tool mounting coding element on the tool interface device. In the presence of a corresponding tool mounting coding element on the tool holder, attachment as a result of coding release is preferably possible via interaction of the mounting coding element with the corresponding tool mounting coding element of the tool interface device. Preferably, the at least one mounting coding element is arranged on the torque transmission element. Preferably, the at least one mounting coding element is formed integrally on the torque transmission element. However, it is alternatively also conceivable that the at least one mounting coding element is configured separately to the torque transmission element and is fixed to the torque transmission element by means of a connection that appears to be useful to a person skilled in the art. Preferably, the tool mounting coding element is configured as a mechanical tool mounting coding element, such as a recess, protrusion, groove, land, or the like. However, it is also conceivable that the tool mounting coding element may be configured as an electronic tool mounting coding element, such as an RFID chip, an NFC chip, a radio wave evaluation device, an electronic reader (bar code reader, a data matrix code reader, etc.), or the like, or that the tool mounting coding element is configured as a combination of a mechanical and an electronic tool mounting coding element. The tool mounting coding element is preferably configured to correspond to the mounting coding element. In one configuration of the mounting coding element as a mechanical mounting coding element, the tool mounting coding element in particular is also configured as a mechanical tool mounting coding element. In one configuration of the mounting coding element as an electronic mounting coding element, the tool mounting coding element in particular is also configured as a mechanical tool mounting coding element. Other corresponding configurations of the mounting coding element and the tool mounting coding element that appear to be useful to a person skilled in the art are also conceivable. Preferably, the connection interface comprises a plurality of tool mounting coding elements, in particular at least two, preferably at least three, and in particular at least four. Preferably, the mounting coding element arranged on the torque transmission element is arranged on an outer surface of the at least one torque transmission element, particularly facing away from the output axis. Preferably, the mounting coding element arranged on the torque transmission element is arranged on an outer surface of the at least one torque transmission element, particularly facing away from the output axis. Preferably, a surface of the mounting coding element arranged on the torque transmission element forms a part of the outer surface of the torque transmission element particularly running at least substantially parallel to the output axis. By means of the configuration according to the invention, incorrect assembly of the insertion tool on the tool holder can advantageously be avoided as far as possible. Advantageously, an arrangement of tool interface devices, which are not suitable for a safe operation of the machine tool, can be counteracted on the tool holder. For example, an arrangement of a tool interface device provided for low maximum speed machine tools can be advantageously countered on a high maximum speed machine tool. An arrangement, in particular installation, of an inappropriate tool interface device at and particularly on the tool holder can be advantageously largely avoided. A simple configuration of a mounting coding can be made possible. An advantageously compact configuration can be achieved.
It is further proposed that the quick-release device and the connection interface of the tool interface device form a bayonet lock in which, in a state of the connection interface arranged on the quick-release device, the tool mounting coding element spaced apart from the securing element interacts with the mounting coding element of the quick-release device. Alternatively, however, other configurations of the quick-release device deemed appropriate by the person skilled in the art are also conceivable. For example, the quick-release device could alternatively also comprise a radially displaceable torque transmission element and/or at least one radially displaceable mounting coding element for connecting to the connection interface. By means of the configuration according to the invention, incorrect assembly of the insertion tool on the tool holder can advantageously be avoided as far as possible. Advantageously, an arrangement of tool interface devices, which are not suitable for a safe operation of the machine tool, can be counteracted on the tool holder. Advantageously, a particularly time-saving and simultaneously secure assembly of the tool interface device on the tool holder can be formed.
The tool interface device according to the invention, the insertion tool according to the invention, and/or the machine tool system according to the invention should not thereby be limited to the application and embodiment described above. In particular, the tool interface device according to the invention, the insertion tool according to the invention, and/or the machine tool system according to the invention can have a quantity of individual elements, components, and units that differs from a quantity defined 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 limits defined hereinabove are also intended to be considered as disclosed and usable as desired.
Further advantages follow from the description of the drawings hereinafter. Three embodiment examples of the invention are shown in the drawing. The drawings, the description, and the claims contain numerous features in combination. A person skilled in the art will appropriately also consider the features individually and combine them into additional advantageous combinations.
Shown are:
The quick-release device 20a is fixed, in particular non-rotatable, on the machine tool 16a, in particular on an output spindle 54 of an output unit 58a of the machine tool 16a. Alternatively, it is conceivable that the quick-release device 20a is detachably arranged on the machine tool 16a, in particular on the output spindle 54a. The quick-release device 20a is provided for fastening a tool interface device 10a of the insertion tool 12a to the machine tool 16a, in particular without tools. The tool interface device 10a is preferably formed as an insertion tool hub. In particular, the machine tool interface device 10a forms the insertion tool hub of the insertion tool 12a. The tool interface device 10a formed as an insertion tool hub can be connected to a tool base body of the insertion tool 12a in a manner already known to a person skilled in the art, for example by means of a welded connection, by means of an adhesive connection, by means of a riveted connection, by means of a combination of at least two of the aforementioned connections, or the like. Preferably, machining elements of the insertion tool 12a are arranged on the tool base body, for example grinding elements or cutting elements. The machining elements can have any configuration of grinding elements or cutting elements that would appear to a person skilled in the art to be useful and, in particular, can be manufactured and/or arranged on the tool base body by means of manufacturing processes that are well known to a person skilled in the art.
The tool interface device 10a can be driven by the output spindle 54a, preferably rotating or oscillating, in particular in a state of the tool interface device 10a secured to the machine tool 16a by means of the quick-release device 20a. The quick-release device 20a, in particular when viewed in a plane extending at least substantially perpendicular to the output axis 38a, has an outer contour designed to correspond with a contour of a connection interface 18a of the tool interface device 10a resulting from a boundary edge 24a of the connection interface 18a.
Preferably, the output unit 58a is intended to transmit a rotational and/or oscillating movement about the output axis 38a to an insertion tool 12a, which is fixed to the output unit 58a by means of the quick-release device 20a and comprises the tool interface device 10a. The output unit 58a is operatively connected to a power unit (not shown here) of the machine tool 16a in a manner already known to a person skilled in the art. In particular, the output unit 58a comprises at least one sleeve and/or at least one hollow shaft, in particular a hollow spindle, which forms the output spindle 54a. The rotational and/or oscillating movement of the output unit 58a can preferably be generated as a result of interaction between the output unit 58 and the drive unit of the machine tool 16, which comprises at least one electric motor or the like. In a state of the tool interface device 10a arranged on the quick-release device 20a, the rotational and/or oscillating movement can preferably be transmitted to the tool interface device 10a by means of a torque transmitting element 62a of the quick-release device 20a.
The drive unit is arranged in a housing 56a of the machine tool 16a, in particular at least partially in a part of the housing 56a in which the output unit 58a of the tool holder 14a is also arranged. The drive unit preferably has an axis of rotation 60a that is at least substantially parallel, in particular coaxial, to the output axis 38a of the output unit 58a. The drive unit is provided for driving the output unit 58a in a manner already known to a person skilled in the art. The drive unit is preferably provided for directly driving the output spindle 54a of the output unit 58a. The output spindle 54a can be rotationally driven about the output axis 38a of the output spindle 54a by means of the drive unit. However, it is also conceivable that the output spindle 54a can be driven in oscillation about the output axis 38a by means of the drive unit. A rotor shaft (not shown in detail here) of the electric motor is preferably connected to the output spindle 54a in a rotationally fixed manner. However, it is also conceivable that the rotor shaft is connected to the output spindle 54a via a belt drive, a gear transmission, or the like, for transmitting drive forces and/or drive torques in a manner already known to a person skilled in the art.
The quick-release device 20a preferably comprises at least the torque transmission element 62a, connected to the output spindle 54 in a rotationally fixed manner and at least one securing element 64a supported displaceably, in particular axially along the output axis 38a. The torque transmission element 62a preferably comprises a plurality of torque transmission projections 66a, 68a (only two torque transmission projections 66a, 68a shown in
The torque transmission element 62a preferably comprises at least one axial securing projection 72a, 74a, 76a, 78a, in particular at least four axial securing projections 72a, 74a, 76a, 78a (see also
Preferably, the securing element 64a comprises a seating edge 80a, in particular four seating edges 80a (see
The securing element 64a is mounted translationally displaceably on the output spindle 54a, in particular along a direction extending at least substantially parallel to the output axis 38a. The securing element 64a is connected to the output spindle 54a in a rotationally fixed but axially displaceable manner by means of a frictional and/or positive connection. Preferably, the quick-release unit 20a comprises at least one spring element (not shown here) for applying a spring force to the securing element 64a, in particular a spring force acting along the output axis 38a, preferably in the direction of the torque transmission element 62a. Preferably, the spring element is designed as a compression spring, in particular a spiral compression spring. However, another configuration of the spring element that would appear sensible to a person skilled in the art is also conceivable. It is preferable for one end of the spring element to be supported on the securing element 64a. Preferably, another end of the spring element is supported on a housing projection of the housing 56a of the portable machine tool 16a or at a bearing element (not shown here), in particular a rolling bearing, for example such as a ball bearing or the like, of the output unit 58a. The bearing element is preferably provided to rotatably support the output spindle 54a in the housing 56a. The spring element is preferably provided to realize an automatic reset function of the quick-release unit 20a in the closed state and/or to induce a pressing force to effect a clamping of the insertion tool 12a, in particular after a disengagement of a detent unit (not shown here) of the tool holder 14a. It is also conceivable, however, that the quick-release unit 20a, alternatively or in addition to the spring element, may comprise at least one actuator for forming an automatic reset function and/or a pressing force to effect a clamping of the insertion tool 12a. The latching unit secures the quick-release device 20a in particular in an actuated position. The latching unit is particularly provided to secure the quick-release device 20a in the open state.
The insertion tool 12a comprises the tool interface device 10a for connecting the insertion tool 12a to the tool holder 14a of machine tool 16a. The tool interface device 10a comprises at least the connection interface 18a for a frictional and/or positive connection to the quick-release device 20a (see also
The connection interface 18a comprises four securing members 26a, 30a, 42a, 44a for axially securing on the quick-release device 20a and for transmitting a torque in a state of the connection interface 18a arranged on the quick-release device 20a. An axial securing of the tool interface device 10a is brought about in particular by securing the tool interface device 10a along an axial direction of an output axis 38a of the output spindle 54a. The four securing elements 26a, 30a, 42a, 44a at least partially form the boundary edge 24a. Alternatively, it is also conceivable that connection interface 18a may comprise one of four different quantities of securing elements 26a, 30a, 42a, 44a, for example, only one securing element 26a, 30a, 42a, 44a, two, three, or more than four securing elements 26a, 30a, 42a, 44a.
The securing elements 26a, 30a, 42a, 44a are each configured as wing clamps. The securing elements 26a, 30a, 42a, 44a are preferably arranged adjacent to an outer boundary contour 82a of the boundary edge 24a of the connection interface 18a bounding the recess 22a of the connection interface 18a, particularly when viewed along the circumferential direction of the connection interface 18a. The circumferential direction of the connection interface 18a runs in a plane extending at least substantially perpendicular to the tool rotation axis 40a of the connection interface 18a. The outer boundary contour 82a is preferably designed as a partial circle contour. The four securing members 26a, 30a, 42a, 44a form an inner boundary contour 84a of the boundary edge 24a when viewed along the circumferential direction of the connection interface 18a. The inner boundary contour 84a is preferably formed as a partial circle contour. The outer boundary contour 82a is arranged on a circle 86a having a diameter that is greater than a diameter of a circle 88a on which the inner boundary contour 84a is arranged. The outer boundary contour 82a is preferably arranged concentrically to the inner boundary contour 84a about the tool rotation axis 40a. The inner boundary contour 84a is preferably arranged on the circle 86a having a maximum diameter of between 17 mm and 18 mm. The outer boundary contour 82a is preferably arranged on the circle 88a having a maximum diameter of 23 mm.
A main extension plane of each of the securing elements 26a, 30a, 42a, 44a runs at least substantially parallel to the main extension plane of the connection interface 18a. The tool rotation axis 40a preferably extends at least substantially perpendicular to the main extension plane of each of the securing elements 26a, 30a, 42a, 44a. The securing elements 26a, 30a, 42a, 44a each extend in a plane extending at least substantially perpendicular to the tool rotation axis 40a starting from the outer boundary contour 82a, in particular the circle 86a, up to the inner boundary contour 84a, in particular the circle 88a. The securing elements 26a, 30a, 42a, 44a are arranged evenly distributed along the circumferential direction of the connection interface 18a. However, it is also conceivable that the securing elements 26a, 30a, 42a, 44a are arranged unevenly distributed along the circumferential direction of the connection interface 18a. The securing elements 26a, 30a, 42a, 44a are preferably provided for a positive and/or frictional connection to the quick-release device 20a along a direction running at least substantially parallel to the direction of the tool rotation axis 40a and along a direction at least substantially perpendicular to the tool rotation axis 40a.
The connection interface 18a comprises four tool mounting coding elements 28a, 46a, 48a, 50a spaced apart from the four securing elements 26a, 30a, 42a, 44a. Alternatively, it is also conceivable that connection interface 18a may comprise one of four different quantities of tool mounting coding elements 28a, 46a, 48a, 50a, for example, only one tool mounting coding element 28a, 46a, 48a, 50a, two, three, or more than four tool mounting coding elements 28a, 46a, 48a, 50a. The tool mounting coding elements 28a, 46a, 48a, 50a at least partially form the boundary edge 24a. The tool mounting coding elements 28a, 46a, 48a, 50a are provided to interact with four mounting coding elements 90a (only one mounting coding element 90a is shown in
The tool mounting coding elements 28a, 46a, 48a, 50a are configured as mechanical tool mounting coding elements. The tool mounting coding elements 28a, 46a, 48a, 50a each have a recess 32a in boundary edge 24a. More particularly, the four tool mounting coding elements 28a, 46a, 48a, 50a are each configured as a recess 32a. Alternatively, it is also conceivable that the tool mounting coding elements 28a, 46a, 48a, 50a are each configured as a protrusion, a groove, a land, an embossment, or the like. Furthermore, it is also alternatively conceivable that the tool mounting coding elements 28a, 46a, 48a, 50a are configured as electronic tool mounting coding elements, such as an RFID chip, an NFC chip, a radio wave evaluation device, an electronic reader (bar code reader, a data matrix code reader, etc.), or the like, or that the tool mounting coding elements 28a, 46a, 48a, 50a are each configured as a combination of a mechanical and an electronic tool mounting coding element. The tool mounting coding elements 28a, 46a, 48a, 50a are provided to interact with the mounting coding elements 90a of the tool holder 14a, in accordance with a key/keyhole principle, in particular in a state of the connection interface 18a arranged on the tool holder 14a.
The tool mounting coding elements 28a, 46a, 48a, 50a can be preferably configured or act as a stress-relief notch, in particular in addition to a mounting coding function. A mechanical and/or electronic evaluation of the tool mounting coding elements 28a, 46, 48a, 50a for assembly and/or fastening of the connection interface 18 to the tool holder 14 must be provided, in particular by means of the mounting coding elements 90a of the tool holder 14a, preferably in order to enable assembly and/or fastening of the connection interface 18a to the tool holder 14a.
The mounting coding elements 90a of the tool holder 14a are provided to encode an arrangement or abutting of the tool interface device 10a, in particular the connection interface 18a, at or on the tool holder 14a. The mounting coding elements 90a are provided to encode an arrangement or abutting of the tool interface device 10a, in particular the connection interface 18a, at or on the tool holder 14a according to a key/keyhole principle. The mounting coding elements 90a are each configured as an axial coding element, in particular as an axial coding element in each case acting along a direction at least substantially parallel to the output axis 38a. The mounting coding elements 90a are provided to encode an axial contact possibility of the tool interface device 10a, in particular the connection interface 18a, onto the quick-release device 20a. The mounting coding elements 90a are preferably provided to at least avoid or prevent attachment of the tool interface device 10a to the tool holder 14a to the greatest possible extent in the absence of the corresponding tool mounting coding elements 28a, 46a, 48a, 50a on the tool interface device 10a. In the presence of the corresponding tool mounting coding elements 28a, 46a, 48a, 50a on the tool holder 14a, attachment is preferably possible via interaction of the mounting coding elements 90a with the corresponding tool mounting coding elements 28a, 46a, 48a, 50a of the tool interface device 10a as a result of a coding release.
The mounting coding elements 90a are arranged on the torque transmission element 62a. The mounting coding elements 90a are formed integrally with the torque transmission element 62a. However, it is alternatively also conceivable that the mounting coding elements 90a are configured separately to the torque transmission element 62a and are fixed to the torque transmission element 62a by means of a connection that appears to be useful to a person skilled in the art. The mounting coding elements 90a are configured as mechanical mounting coding elements. The mounting coding elements 90a are configured as protrusions. Alternatively, it is also conceivable that the mounting coding elements 90a are each configured as recesses, grooves, lands, or the like. Furthermore, it is also conceivable that the tool mounting coding element 90a is configured as an electronic tool mounting coding element, such as an RFID chip, an NFC chip, a radio wave evaluation device, an electronic reader (bar code reader, a data matrix code reader, etc.), or the like, or that the tool mounting coding element 90a is configured as a combination of a mechanical and an electronic tool mounting coding element.
The mounting coding elements 90a arranged on the torque transmission element 62a are arranged on an outer surface 96a of the at least one torque transmission element 62a, in particular facing away from the output axis 38a. The outer surface 96a is at least substantially parallel to the output axis 38a. A surface of the mounting coding elements 90a arranged on the torque transmission element 62a forms part of the outer surface 96a.
The tool mounting coding elements 28a, 46a, 48a, 50a are arranged spaced apart from each of the securing elements 26a, 30a, 42a, 44a, when viewed along the circumferential direction of connection interface 18a. The tool mounting coding elements 28a, 46a, 48a, 50a are arranged spaced apart from the securing elements 26a, 30a, 42a, 44a, when viewed along the boundary edge 24a. The tool mounting coding elements 28a, 46a, 48a, 50a are arranged on circle 86a defined by the outer boundary contour 82a of the boundary edge 24a. The tool mounting coding elements 28a, 46a, 48a, 50a are arranged on outer boundary contour 82a. The tool mounting coding elements 28a, 46a, 48a, 50a are arranged at least substantially entirely outside the circle 88a on which the inner boundary contour 84a is arranged, particularly at least when viewed in a direction parallel to the tool rotation axis 40a. The tool mounting coding elements 28a, 46a, 48a, 50a are arranged at least substantially entirely outside the circle 86a on which the outer boundary contour 82a is arranged, particularly at least when viewed in a direction parallel to the tool rotation axis 40a. The tool mounting coding elements 28a, 46a, 48a, 50a form an additional boundary contour 92a. The additional boundary contour 92a is arranged at least substantially entirely outside of the circle 88a on which the inner boundary contour 84a is arranged, particularly when viewed in the direction parallel to the tool rotation axis 40a. The additional boundary contour 92a is arranged at least substantially entirely outside of the circle 86a on which the outer boundary contour 82a is arranged, particularly at least when viewed in the direction parallel to the tool rotation axis 40a.
The additional boundary contour 92a forms a partial circle contour. The additional boundary contour 92a is arranged on a circle 94a having a diameter preferably greater than a diameter of the circle 88a on which the inner boundary contour 84a is arranged. The diameter of the circle 94a on which the additional boundary contour 92a is arranged is greater than the diameter of the circle 86a on which the outer boundary contour 82a is arranged.
The tool mounting coding elements 28a, 46a, 48a, 50a are each arranged along the boundary edge 24a in a central region between two of the securing elements 26a, 30a, 42a, 44a. The securing elements 26a, 30a, 42a, 44a are at least substantially identical to each other. The respective center region extends, starting from a center point on the circle 86a on which outer boundary contour 82a is arranged, between two of the securing elements 26a, 30a, 42a, 44a, respectively, along the circle 86a on which the outer boundary contour 82a is arranged. A maximum extent of the respective center region starting from the respective center point along the circle 86a, on which the outer boundary contour 82a is arranged, is preferably a maximum of 50%, preferably a maximum of 35%, and more preferably a maximum of 25%, of two of the particularly adjacent securing members 26a, 30a, 42a, 44a viewed along boundary edge 24a, in particular the circle 86a on which the outer boundary contour 82a is arranged.
The tool mounting coding elements 28a, 46a, 48a, 50a each have a maximum extent along a radial axis that is a maximum value of a respective maximum height of the securing elements 26a, 30a, 42a, 44a along a radial axis. The tool mounting coding elements 28a, 46a, 48a, 50a each have a maximum extent along a transverse direction, particularly at least substantially perpendicular to the tool rotation axis 40a, in particular the radial axis of the connection interface 18a, which is less than a maximum distance between the circle 88a on which the boundary inner contour 84a is arranged and the circle 86a on which the outer boundary contour 82a is arranged. Alternatively, it is conceivable the tool mounting coding elements 28a, 46a, 48a, 50a each have a maximum extent along a transverse direction, in particular at least substantially perpendicular to the tool rotation axis 40a, in particular, the radial axis of the connection interface 18a, which is equal to the maximum distance between the circle 88a on which the inner boundary contour 84a is arranged and the circle 86a on which the outer boundary contour 82a is arranged or is greater than the maximum distance between the circle 88a on which the inner boundary contour 84a is arranged and the circle 86a on which the outer boundary contour 82a is arranged.
The quick-release device 20a and the connection interface 18a of the tool interface device 10a form a bayonet lock wherein, in a state of the connection interface 18a arranged on the quick-release device 20a, the tool mounting coding elements 28a, 46a, 48a, 50a respectively spaced apart from the securing elements 26a, 30a, 42a, 44a, interact with the mounting coding elements 90a of the quick-release device 20a. The quick-release device 20a described herein merely depicts an exemplary quick-release device 20a, wherein other configurations that appear to be useful to a person skilled in the art are also conceivable for the quick-release device 20a. For example, the quick-release device 20a could alternatively also comprise a radially displaceable torque transmission element 62a and/or a radially displaceable mounting coding element 90a for connecting to the connection interface 18a.
The tool mounting coding elements 28a, 46a, 48a, 50a are provided to interact with four mounting coding elements 90a′ of the tool holder 14a′ in a state of the connection interface 18a arranged on the tool holder 14a′. The connection interface 18a preferably comprises an identical quantity of tool mounting coding elements 28a, 46a, 48a, 50a depending on a quantity of mounting coding elements 90a′ of the tool holder 14a′. However, it is also conceivable that the connection interface 18a has a quantity of tool mounting coding elements 28a, 46a, 48a, 50a different from, in particular greater than, a quantity of mounting coding elements 90a′ of the tool holder 14a′.
Two further embodiment examples of the invention are shown in
The connection interface 18b comprises four tool mounting coding elements 28b, 46b, 48b, 50b spaced from the securing elements 26b, 30b, 42b, 44b. The tool mounting coding elements 28b, 46b, 48b, 50b at least partially form the boundary edge 24b. The tool mounting coding elements 28b, 46b, 48b, 50b are provided to interact with at least one mounting coding element of the tool holder in a state of the connection interface 18b arranged on the tool holder. The tool mounting coding elements 28b, 46b, 48b, 50b each have a protrusion 34b on the boundary edge 24b. More particularly, the tool mounting coding elements 28b, 46b, 48b, 50b are each configured as a protrusion 34b.
The connection interface 18c comprises four tool mounting coding elements 28c, 46c, 48c, 50c spaced apart from the securing elements 26c, 30c, 42c, 44c. The tool mounting coding elements 28c, 46c, 48c, 50c at least partially form the boundary edge 24c. The tool mounting coding elements 28c, 46c, 48c, 50c are provided to interact with at least one mounting coding element of the tool holder in a state of the connection interface 18c arranged on the tool holder.
The tool mounting coding elements 28c, 46c, 48c, 50c each have a protrusion 34c at the boundary edge 24c having an axially projecting component. More particularly, the tool mounting coding elements 28c, 46c, 48c, 50c are each configured as a protrusion 34c having an axially projecting component. The securing members 26c, 30c, 42c, 44c each have at least substantially parallel contact surfaces 98c relative to a tool rotation axis (not shown here). The contact surfaces 98c are provided to interact with the tool holder 14c, in particular the quick-release device 20c, in order to axially secure the connection interface 18c to the tool holder 14c, in particular the quick-release device 20c. The protrusions 34c each protrude from a plane defined by the contact surfaces 98c.
The tool interface device 10c has a surface 36c surrounding the connection interface 18c. A main extension plane of the surface 36c is spaced apart from a main extension plane of the four securing elements 26c, 30c, 42c, 44c, wherein the protrusions 34c having axially projecting components are arranged at least substantially entirely between the main extension plane of the surface 36c surrounding the connection interface 18c and the main extension planes of the securing elements 26c, 30c, 42c, 44c. The main extension planes of the securing elements 26c, 30c, 42c, 44c are at least substantially parallel to the contact surfaces 98c thereof.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2022 200 952.5 | Jan 2022 | DE | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2022/084349 | 12/5/2022 | WO |
