EP3722050B1 - Device for holding a functional unit for a machine tool and method for attaching such a device on a machine tool - Google Patents

Description

The present invention relates to a device for receiving a functional unit for a tool device, wherein the receiving device can be attached to the tool device with a dovetail connection and with a further fastening mechanism. In a second aspect, the invention relates to a method for attaching such a receiving device to a tool device. In the further fastening mechanism, a rotatable plug-in part can be inserted into an opening of the receiving device and, by this rotational movement, can be converted from an unsecured to a fastened state. In the fastened state, a hook of the tool device engages with an elevation of the plug-in part.

Various methods are known in the prior art for attaching functional units, such as, for example, line laser devices, to tool devices. For example, it is proposed in the prior art to glue, screw and / or plug line laser devices onto the tool devices. However, it has been shown that - for example due to distortions that can easily occur in the manufacture of the corresponding components - deviations and inaccuracies can occur as a result. In particular if the functional unit is a line laser device, imprecise representations of the desired projection target can result, which can lead to the tool device not being guided in an optimal straight line. A non-straight line can lead to inaccurate work results that have to be reworked or repeated if necessary. A device according to the preamble of claim 1 is from EP 1 522 389 A1 known.

Furthermore, due to vibrations at the fastening point between the functional unit and the tool device, the sharpness of the projection can be lost. This can happen in particular when the functional unit detaches itself from the tool device and is no longer firmly attached. A further disadvantage of the permanently mounted functional units is that such a system of functional unit and tool device, because the functional unit is always carried along, necessarily has a higher overall weight compared to easily removable ones Functional units that can only be mounted on the tool device when required.

The object on which the present invention is based is thus to overcome the disadvantages of the prior art described above and to provide a fastening solution with which a functional unit can be detachably connected to a tool device. The fastening solution to be provided should lead to a reduction in the weight of the system comprising the functional unit and tool device and, moreover, enable the functions of the functional unit to be carried out particularly precisely. If the functional unit is a line laser device, the fastening solution to be provided should enable a precise projection of the emitted laser beam onto the desired projection target, so that the tool device can achieve an optimal, precise work result based on the projected beam.

The object is achieved by the subject matter of the independent claims. Advantageous embodiments relating to the subject matter of the independent claims can be found in the dependent claims.

According to the invention, a device for receiving a functional unit for a tool device is provided, the device being attachable to the tool device. The device is preferably also referred to as a receiving device and is characterized in that the device comprises a recess for forming a dovetail connection and a further fastening mechanism, the further fastening mechanism comprising an opening in the device and a rotatable plug-in part that can be inserted into the opening, wherein the opening is formed by a bore on a side facing away from the tool device and the device comprises a slot for receiving a hook on a side facing the tool device, the hook being present on the tool device and in a fastened state with an elevation of the plug-in part for fastening the Device on the tool device is in engagement.

With the invention, a device can be provided with which a functional unit can be attached to a tool device in a particularly stable and secure manner. The two fastening mechanisms that interact with one another ensure an unexpected stability of the fastening and effective protection against displacement and undesired slipping of the receiving device and the functional unit located therein. These advantages are achieved in particular in that the hook of the tool device, in the fastened state, can come into engagement with the elevation of the plug-in part, this being the case Attachment according to the proposed invention can be combined with a dovetail connection.

The functional unit can be a line laser device, for example. A line laser device is preferably set up to emit a laser beam with which, for example, a projection target can be aimed at. The tool device can follow the emitted laser beam, which preferably forms a straight line or a straight line, whereby a working track is advantageously generated which also corresponds to a straight line. It is preferred in the context of the invention that the receiving device has a cavity in a front area for receiving the functional unit for the tool device. This cavity can in particular represent a cavity for receiving the line laser device. The cavity for receiving the line laser device is preferably formed in a transition area between two mutually corresponding halves of the device. For the purposes of the invention, it is particularly preferred that the device has an opening in the front area through which the laser light emitted by the line laser device can be guided. The opening is preferably closed with a material that is transparent to the laser light, preferably disk-shaped, so that the line laser device is protected from soiling and damage. The line laser device preferably comprises a laser light source with which a laser beam can be generated. In other words, the line laser device is preferably set up to emit a preferably linear, thin laser beam that is used to guide a work process that is carried out with the tool device to which the line laser device can be attached. In other words, the tool device can be used to follow a laser line that is drawn with the line laser device, for example to produce a straight slot if the tool device is a slitting device or a cut-off grinder. The receiving device can also be attached to saws, cutters, cutting devices, cutting devices or saws such as hand-held circular saws, reciprocating saws or ring saws. In particular, use on such tool devices is preferred in which work is carried out along an essentially straight line and in which guidance by a laser beam is desirable.

It is preferred in the context of the invention that a target can be aimed at with the line laser device and this bearing line can be followed with the tool device while working. If, for example, a slot is to be created in a wall for the laying of a power cable to a socket or to a switch, the socket or switch can be aimed at with the laser beam of the line laser device. During the work or the slitting process, the work equipment can then of the tool device, for example a cutting disc or a chisel, follow the course of the laser light beam and thus create a particularly straight and jerk-free slot. Depending on the tool device used, the work equipment can be, for example, diamond disks, cutting disks, saw blades, chisels, drill bits, saw chains, saw cables and / or grinding chains, without being restricted to them.

For generating the laser beam and for following the laser beam with the tool device, it is necessary that the laser light source is attached to the tool device in a particularly stable and wobble-free manner. In the context of the present invention, this is achieved in particular by providing the at least two fastening mechanisms that work synergistically so that in particular the dovetail connection provides lateral slip protection of the device in relation to the tool device, as well as effective vibration protection. The second fastening mechanism, by providing a fastened and an unsecured state, allows the connection between the device and the tool device to be detached, so that the receiving device can be particularly easily assembled or disassembled, depending on the needs of the user.

In the case of the second fastening mechanism, which is preferably easy to detach, an insert part can be inserted into an opening in the receiving device. The receiving device preferably comprises a base body which is formed by two parts that correspond to one another. It is preferred in the context of the invention that a first side or half of the receiving device or the base body faces away from the tool device and a second side or half of the receiving device or the base body faces the tool device. The two side parts of the receiving device are preferably also referred to as mutually corresponding halves. In the context of the invention, the term “designed to correspond to one another” preferably does not mean that the two device halves have to be designed congruently or symmetrically to one another. The term preferably indicates that the halves are designed in such a way that they are designed to one another in a transition area such that the two halves can be placed on top of one another in a particularly simple and uncomplicated manner in order to obtain the essentially closed base body of the receiving device. In particular, the edges of the two device halves, which preferably form the transition area between the halves, are matched to one another so that, for example, the second half of the base body can be plugged into the first half of the base body. It is within the meaning of the invention that the two main body halves can be connected to one another by fastening means. For example, writing can be used to obtain a screw connection between the halves of the receiving device.

With the present invention, in particular, a double fastening solution is proposed with which a functional unit can be fastened to a tool device. The term “double” in the context of the invention preferably means that, in the context of the proposed fastening solution, a dovetail connection is combined with a further fastening mechanism in order to ensure a particularly stable and vibration-resistant fastening. In a particularly preferred exemplary embodiment of the invention, an additional component, such as the functional unit or an accessory, can be attached to a power tool . The power tool can be, for example, a slotting device that can be used, for example, to grind slots in walls in order to lay cables in them. The double fastening advantageously ensures that the functional unit is mounted on the tool device at the correct angle and position. In addition, the proposed fastening solution ensures that the vibrations acting on the functional unit are minimized. This represents an essential advantage of the present invention, since in this way the mechanical loads on the optics and the internal electronics of the functional unit can be reduced considerably.

Another advantage of the invention is that the functional unit can be attached to the tool device particularly quickly and practically without tools. This makes it possible to mount the functional unit on the tool device only in the work phases in which, for example, the projection of a laser beam is necessary for the use of the tool device. This enables the tool device to be used at all other times without the functional unit. As a result, the weight of the tool device in these work phases in which the device is used without the functional unit can be significantly reduced compared to such tool devices in which the functional unit is permanently mounted or is integrated into the tool device. In particular, the invention enables weight-optimized work with the tool device. The invention also makes it possible, through the two-sided fastening approach, to compensate for dimensional fluctuations in the production of the proposed receiving device due to the resulting tension conditions. Due to the two-sided fastening, in particular manufacturing-related dimensional inaccuracies can be compensated and thus a position of the laser light that is as exact as possible can be achieved.

In a preferred exemplary embodiment, the invention comprises a preferably T-shaped support or pin, which is located in a front region of the tool device or on a Can be arranged front side of the tool device. In alternative embodiments of the invention, V- or U-shaped pins can also be used. The use of a support or pin on the tool device that interacts with a recess on the functional unit preferably leads to the formation of a first or dovetail connection mechanism which, in the context of the invention, interacts with a further fastening mechanism to ensure stable fastening of the functional unit with minimized transmission of vibrations to the functional unit to enable. In the context of the invention, it is preferred that the pin on the tool device is clasped by the recess in the functional unit.

In one embodiment of the invention, it is preferred that the plug-in part is inserted into the opening of the receiving device when the two halves of the device are not connected to one another. When a customer purchases the receiving device, the two halves of the receiving device are preferably connected to one another and the plug-in part is located within the receiving device. In other words, it is preferred in the context of the invention that the plug-in part is located in a preferably hollow interior of the receiving device, in particular in the opening of the receiving device. The plug-in part preferably has a cylindrical base body so that it can be rotated in the hollow cylindrical opening of the receiving device, which is preferably at least partially designed as a bore.

It is preferred in the context of the invention that the plug-in part comprises a slot with which the plug-in part can be rotated in the opening, the slot being arranged on the side of the plug-in part facing away from the elevation. It is preferred in the context of the invention that the slot of the plug-in part is visible in the opening on the side of the receiving device facing away from the tool device. In the context of the invention, it is also preferred that the plug-in part can be converted from the attached to an unsecured state by a turning process in the opening or the bore of the receiving device, or vice versa. The plug-in part preferably has an elevation which faces the tool device when the plug-in part is located in the receiving device. It is preferred in the context of the invention that the tool device comprises a hook for fastening the receiving device to the tool device. This hook can be arranged, for example, on a side surface or on an upper side of the tool device. The fastened state is preferably characterized in that the hook of the tool device is in engagement with the elevation of the plug-in part. In the fastened state, the receiving device is preferably connected to the tool device and can be moved together with it. Of the The unsecured state is preferably characterized in that the hook of the tool device is not in engagement with the elevation of the plug-in part. As a result, the second fastening mechanism in the unsecured state advantageously has no fastening effect between the receiving device and the tool device, and the receiving device can be dismantled, removed or removed from the tool device. The receiving device can in particular be removed by also releasing the dovetail connection, for example by lifting or pulling the receiving device upwards from the pin as the counterpart of the dovetail slot.

In the context of the invention, it is preferred that the front area of the receiving device has an essentially trapezoidal basic shape in a side view. According to the invention, the short upper side of the trapezoid preferably points to the front, while the longer lower side of the trapezoid faces the tool device. The tool device preferably has an essentially flat end face to which the receiving device can be attached. The tool device preferably has a pin on the front or end face, this pin being set up to form a dovetail connection together with the recess of the receiving device.

It is true that the proposed receiving device interacts with components of the tool device, in particular with the pin on the end face of the tool device and the hook that is required for the second fastening mechanism. However, these components of the tool device, in particular pins and hooks, are not part of the proposed receiving device. However, it is particularly preferred in the sense that the shape of the pin corresponds to the shape of the corresponding recess on the receiving device or that the shapes are matched to one another. In the context of the invention, it is also preferred that the shape of the hook of the tool device and the shape of the elevation of the plug-in part are matched to one another or are designed to correspond to one another.

For the purposes of the invention, it is preferred that the recess for forming a dovetail connection is located on a rear side of the front area of the device. In the context of the invention, it is particularly preferred that the rear side of the front region of the receiving device faces the tool device. As a result, the dovetail slot of the receiving device can advantageously interact with the pin of the tool device, so that with the invention a particularly effective lateral slip protection the receiving device and an effective vibration protection can be provided.

In a further preferred embodiment of the invention, the recess tapers in its course to form a dovetail connection. According to the invention, it is particularly preferred that the dovetail recess on the receiving device tapers from an insertion opening on an underside of the front area of the device to one end of the recess. In other words, the recess for forming a dovetail connection becomes narrower from the insertion opening towards its end. The tool device preferably has a corresponding elongated pin which corresponds to the tapering shape of the dovetail recess. In a sectional view through the dovetail recess of the receiving device, the recess has the shape of a letter "T". For the purposes of the invention, it is preferred that both the lower area of this preferably T-shaped recess and the upper bar area taper from bottom to top or become narrower in their course. In this way, it is advantageously avoided that the receiving device undesirably slides from the tool device or becomes detached from it. In particular, the tapering design of the dovetail connection effectively prevents the receiving device from slipping upwards or downwards.

It is preferred in the context of the invention that the receiving device comprises at least one switch for controlling the functional unit for the tool device. This can preferably be a switch for switching the functional unit on and off. If the functional unit is formed by a line laser, for example, the switch can be set up to switch the line laser on and off. The switch can preferably be designed as a push button switch. However, other switch geometries and operating principles can also be used in the context of the present invention. It is particularly preferred in the context of the invention that the switch is arranged on an upper side of the receiving device, since it can be operated there particularly easily by the user of the tool device. However, it can also be preferred that the at least one switch is arranged on a front side, side surface and / or rear side of the device if, for example, special geometries of the tool device or its handle make this necessary.

In a further preferred embodiment of the invention, the slot for receiving the hook of the tool device has non-parallel delimiting edges. This slot is preferably located on a side of the receiving device facing away from the tool device. The wording "facing away from the tool device" and "facing the tool device" preferably relate to a state in which the receiving device is present mounted on the tool device. It is preferred in the context of the invention that the receiving device and the tool device can be present both in the assembled state, ie in the interconnected state, and separately, ie separately from one another. In the context of the invention, it is preferred that the two delimiting edges that form the receiving slot have a greater distance from one another in a lower opening area than in an upper area of the receiving device. In other words, in the context of the present invention, the slot for receiving the hook, which is preferably present on the receiving device, also tapers. This taper is advantageously used to ensure that the hook of the tool device is guided into the upper area of the receiving device, where the hook can be converted into the fastened state by a rotational movement in that the hook can engage with the elevation of the plug-in part.

For the purposes of the invention, it is preferred that part of the slot is covered by an undercut on the side facing the tool device. The elevation of the plug-in part can be located in this undercut area, for example in the unsecured state of the receiving device.

In a further embodiment of the invention, it is preferred that a centering disk segment is arranged in the opening of the device, the centering disk segment having a guide opening. This guide opening preferably has a diameter which is smaller than the diameter of the opening of the receiving device. In addition, the centering disk segment has a ring segment, the ring segment of the centering disk segment covering approximately 2/3 of a full circle.

In the context of the invention, it is preferred that the elevation of the insert part is designed such that the elevation can be moved in the remaining third of a full circle of the centering disk segment. This movement is, in particular, a rotatory back and forth movement or a back and forth rotational movement which the plug-in part can perform in the opening of the receiving device. The receiving device can preferably be converted from an unsecured to a fastened state or vice versa by the rotary movement of the elevation of the plug-in part within the remaining free portion of the centering disk segment. In order to bring about the rotary movement with which the plug-in part can be transferred from the attached to the unsecured state, a tool, such as a slotted screwdriver. However, depending on availability, a coin or a fingernail can also be used to rotate the plug-in part in the opening of the receiving device and thus attach the receiving device to the tool device. In the context of the invention, it is particularly preferred that the centering disk segment is formed from the same material as the device. In alternative embodiments, however, it can also be preferred that the centering disk segment consists of a different material or comprises a different material.

1. a) Bereitstellung einer Aufnahmevorrichtung in einem unbefestigten Zustand, wobei der unbefestigte Zustand der Aufnahmevorrichtung durch eine Lage eines Einsteckteils in der Aufnahmevorrichtung festgelegt wird,
2. b) Einführen eines Zapfens des Werkzeuggerät in eine Aussparung der Aufnahmevorrichtung,
3. c) Einführen eines Hakens des Werkzeuggerät in einen Schlitz der Aufnahmevorrichtung,
4. d) Drehen des Einsteckteils innerhalb der Aufnahmevorrichtung, so dass die Aufnahmevorrichtung von einem unbefestigten in einen befestigten Zustand überführt wird und eine Verbindung zwischen dem Werkzeuggerät und der Aufnahmevorrichtung erhalten wird.

In a second aspect, the invention relates to a method for attaching a receiving device for a functional unit to a tool device, the proposed method comprising the following steps:

1. a) Provision of a receiving device in an unsecured state, the unsecured state of the receiving device being determined by a position of an insert part in the receiving device,
2. b) inserting a pin of the tool device into a recess of the receiving device,
3. c) inserting a hook of the tool device into a slot of the receiving device,
4. d) Rotating the plug-in part within the receiving device, so that the receiving device is transferred from an unsecured to a fixed state and a connection between the tool device and the receiving device is obtained.

The terms, definitions and technical advantages introduced for the receiving device preferably apply analogously to the method for attaching the receiving device to a tool device. It is preferred in the context of the invention that the receiving device is initially separate or separate from the tool device to which the device is to be attached. The elevation of the plug-in part is preferably present in the remaining free third of the full circle of the centering disk segment on the stop. By rotating the insert part, the elevation can be moved from a first stop on one side of the remaining third of the full circle of the centering disk segment to a second stop on the other side of the remaining free third of the full circle of the centering disk segment. As a result of this rotary movement, the plug-in part is preferably transferred from an unsecured to the fastened state.

If the receiving device is to be fastened to the tool device, the receiving device, the stretched-in part of which is preferably in the unsecured state, is first connected to the tool device by forming the dovetail joint. For this purpose, the elongate pin, which is preferably arranged on an end face of the tool device, is inserted into a recess in the receiving device. The recess is preferably the dovetail recess of the receiving device. In addition, the hook that is present on the tool device is inserted into a lateral slot of the receiving device, the slot being on the side of the receiving device that faces the tool device. The slot preferably has lateral delimiting edges which are not formed parallel to one another, but which converge towards one another starting from an insertion opening. In other words, the slot, which is part of the second fastening mechanism, tapers in its course.

It is preferred in the context of the invention that the receiving device is pivoted into the T-slot or the pin in the front area of the tool device and then pushed down until a snug fit is achieved. The plug-in part, which is preferably also referred to as a fixing screw in the context of the invention, is then preferably rotated 90 ° clockwise until it clicks into place. The latching signals that the elevation of the fixing screw has come into engagement with the fastening contour of the tool device. This assumes the fortified state. Advantageously, the slot for receiving the fastening contour and the undercut enable particularly precise centering of the receiving device, the centering becoming more and more precise as the hook is inserted into the slot, since the slot tapers in a particularly preferred embodiment of the invention. For the purposes of the invention, it is preferred that an inner angle describes the tapering of the slot as the opening angle.

By rotating the insertion part in the opening of the receiving device, the elevation of the insertion part, which is arranged on the side facing the tool device, comes into engagement with the hook of the tool device. This rotary movement of the plug-in part takes place in particular in the opening of the receiving device or in the interior of the essentially hollow receiving device. It is preferred in the context of the invention that the position of the plug-in part within the opening or bore of the receiving device determines whether the receiving device or the plug-in part is in the unsecured or in the attached state.

Further advantages emerge from the following description of the figures. The figures, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Fig. 1

Ansicht einer bevorzugten Ausgestaltung des Einsteckteils

Fig. 2

Ansicht einer bevorzugten Ausgestaltung der Schwalbenschwanzverbindung, insbesondere Zapfen und Aussparung

Fig. 3

Ansicht einer bevorzugten Anordnung des Zapfens am Werkzeuggerät

Fig. 4

Darstellung einer beispielhaften Anbringung der Aufnahmevorrichtung an dem Werkzeuggerät

Fig. 5

Darstellung einer bevorzugten Ausgestaltung der Aufnahmevorrichtung

Fig. 6

Darstellung einer bevorzugten Ausgestaltung der Aufnahmevorrichtung im montierten Zustand

Fig. 7

Darstellung des Schlitzes einer bevorzugten Ausführung der Aufnahmevorrichtung

Fig. 8

Darstellung einer bevorzugten Ausgestaltung des Hakens am Werkzeuggerät

Fig. 9

Darstellung einer bevorzugten Ausgestaltung des Werkzeuggeräts mit Zapfen und Haken

Fig. 10

Ansicht einer bevorzugten Anordnung des Zapfens am Werkzeuggerät

In the figures, the same and similar components are numbered with the same reference symbols. Show it:

Fig. 1

View of a preferred embodiment of the plug-in part

Fig. 2

View of a preferred embodiment of the dovetail connection, in particular pin and recess

Fig. 3

View of a preferred arrangement of the pin on the tool device

Fig. 4

Representation of an exemplary attachment of the receiving device to the tool device

Fig. 5

Representation of a preferred embodiment of the receiving device

Fig. 6

Representation of a preferred embodiment of the receiving device in the assembled state

Fig. 7

Representation of the slot of a preferred embodiment of the receiving device

Fig. 8

Representation of a preferred embodiment of the hook on the tool device

Fig. 9

Representation of a preferred embodiment of the tool device with tenons and hooks

Fig. 10

View of a preferred arrangement of the pin on the tool device

Embodiments:

Figure 1 shows a view of a preferred embodiment of the plug-in part (6), which together with an opening (5) of the receiving device (1) and a hook (11) of the tool device (3) forms a second fastening mechanism. When fastened, the hook (11) engages an elevation (12) of the plug-in part (6), the plug-in part (6) being rotatably mounted in the opening (5) of the receiving device (1) and being fastened with a rotary movement can be transferred to an unsurfaced state. The opening (5) on the receiving device (1) is formed by a bore (9) on a side (7) of the receiving device (1) facing away from the tool device (3), while on a side (8) facing the tool device (3) the receiving device (1) has a slot (10) for receiving the hook (11) of the tool device (3). The hook (11) on the tool device (3) can preferably also be referred to as a fastening contour. In the figures, in particular, an L-shaped fastening contour is shown. However, other shapes, such as shapes that correspond to the letters T, U, V, K, Z or N are also conceivable. It is preferred in the context of the invention that the diameter of the fastening contour (11) increases from top to bottom.

Figure 2 shows a view of a preferred embodiment of the dovetail connection, in particular the pin (22) and the recess (4). The pin (22) is preferably located on the tool device (3), for example in a front area, which can preferably be oriented in the direction of a working movement of the tool device (3). The tool device (3) can preferably have an end face in its front area, on which the pin (22) can be arranged. The pin (22) can in particular be T-shaped, with V, L, K, Z, N or U shapes also being conceivable. The pin (22) and the recess (4) preferably taper in their course. For the purposes of the invention, it is particularly preferred that the contour increase in dimensions from top to bottom, this increase taking place, for example, in an angular range between 0 to approximately 30 degrees.

In the upper right area in Figure 2 a window is shown which is preferably part of the front area (16) of the receiving device (1). A cavity (15) for receiving the functional unit (2) can be formed behind the window. If the functional unit (2) is a line laser device, the laser beam emitted by the line laser device can be directed through the window onto the projection target and thus form a guide line for working with the tool device (3).

Figure 3 shows a view of a possible arrangement of the pin (22) on the tool device (3).

Figure 4 shows an illustration of an exemplary attachment of the receiving device (1) to the tool device (3). As in Figure 4 shown, the body of the tool device (3) can be spanned by a bow-shaped handle, under which the receiving device (1) can be attached. Figure 4 shows a receiving device (1) during assembly on the tool device (3). The pin (22) of the tool device (3) is inserted into the recess (4) on the receiving device (1), this insertion being only possible in one direction due to the preferred tapering of the recess (4) and pin (22). Is shown in Figure 4 in particular a front view of the tool device (3) with operating elements. In particular shows Figure 4 an end face of the tool device (3) on which the pin (22) can be arranged to form the dovetail connection. Figure 4 also shows the front area (16) of the receiving device (1), which in a side view (not shown) of the receiving device has a trapezoidal basic shape. The front part (16) of the receiving device (1) preferably comprises a cavity (15) in which the functional unit (2) can be accommodated. In the assembled state, the receiving device (1) preferably rests on the tool device (3) with a side (8) facing the tool device (3), while one side (7) of the receiving device (1) facing away from the tool device (3) is attached to the tool device ( 3) shows away or away.

Figure 5 shows a representation of a preferred embodiment of the receiving device (1). In Figure 5 the receiving device (1) is not yet fully mounted on the tool device (3). In particular shows Figure 5 the position of the receiving device (1) in relation to a handle of the tool device (3). The receiving device (1) can comprise a switch (17) for controlling the functional unit (2). With this switch (17), the functional unit (2) can be switched on or off, for example. The switch (17) is preferably located in a rear area of the receiving device (1). The rear area of the receiving device (1) is preferably facing away from the working direction of the tool device (3).

Figure 6 shows a further representation of a preferred embodiment of the receiving device (1) in the mounted state on the tool device (3), wherein Figure 6 in particular represents a side view of the assembled receiving device (1). In Figure 6 In particular, the side (7) of the receiving device (1) facing away from the tool device (3) is shown, in which an opening (5) is made. On the side (7) of the receiving device (1) facing away from the tool device (3), the opening (5) is preferably designed as a bore (9) which preferably has an essentially circular base area. In the bore (9) or the opening (5) there is preferably the plug-in part (6), which can be converted from a fixed to an unsecured state by turning. The rotary movement of the male part (6) can preferably be transferred to the insert part (6) using the slot (13) of the insert part (6). A coin or other tool that is usually readily available on construction sites, for example, can be used for this purpose.

Figure 7 shows a representation of the slot (10) of a preferred embodiment of the receiving device (1). The slot (10) preferably comprises two side or delimiting edges, which preferably do not run parallel to one another. The slot (10) further comprises an undercut (18) which covers part of the slot (10). In particular, the undercut (18) at least partially covers an inner area of the receiving device (1) which comprises the centering disk segment (19, not shown). The centering disk segment (19) is preferably arranged in the opening (5) of the device (1), the centering disk segment (19) having a guide opening (20) in its center. The centering disk segment (19) preferably has a ring segment (21), the ring segment (21) of the centering disk segment (19) covering approximately 2/3 of a full circle. It is preferred in the context of the invention that the centering disk segment (19) comprises a guide opening (20) in its center, around which there is an angular range of 200 to 280 degrees, preferably 220 to 260 degrees, particularly preferably between 230 and 250 degrees and most preferably the ring segment (21) extends at about 240 degrees. The remaining area of the inner cavity of the centering disk segment (19) preferably remains free, this remaining free portion of the centering disk segment (19) preferably having an angular range of 80 to 160 degrees, preferably from 100 to 140 degrees, particularly preferably from 110 to 130 degrees, and most of all preferably of about 120 degrees. In other words, the remaining free portion of the centering disk segment (19) preferably makes up about 1/3 of a full circle, the elevation (12) of the insert part (6) being designed so that the elevation (12) is in the remaining third of a Full circle of the centering disc segment (19) is movable.

Figure 7 also shows that the base body (14) of the receiving device (1) is formed from two halves (14a, 14b), a first half (14a) facing the tool device (3) in the assembled state, while a second half (14b) facing away from the tool device (3) in the assembled state of the receiving device (1).

Figure 8 shows a representation of a preferred embodiment of the hook (11) on the tool device (3).

Figure 9 shows a representation of a preferred embodiment of the tool device (3) with pin (22) and hook (11).

Figure 10 shows a view of a preferred arrangement of the pin (22) on the tool device (3).

List of reference symbols

1

Cradle

2

Functional unit

3

Tool device

4th

Recess to form a dovetail connection / dovetail recess

5

opening

6th

Insert part

7th

Side of the receiving device that faces away from the tool device

8th

Side of the receiving device that faces the tool device

9

drilling

10

Slot for receiving the hook of the tool device

11

hook

12th

Elevation of the insert part

13th

Slot of the insert part

14th

Base body of the receiving device

14a, 14b

Side halves of the base body of the receiving device

15th

Cavity to accommodate the functional unit

16

front area of the device

17th

Switch for controlling the functional unit

18th

Undercut

19th

Centering disc segment

20th

Guide opening

21

Ring segment of the centering disc segment

22nd

Spigot on the tool device to form the dovetail joint

Claims (15)

1. Device (1) for receiving a functional unit (2) for a power tool (3), wherein the device (1) is able to be fastened to the power tool (3), and the device (1) comprises a cutout (4) for forming a dovetail connection and a further fastening mechanism, wherein the further fastening mechanism comprises an opening (5) in the device (1) and a rotatably configured insert part (6) that is introducible into the opening (5),
   characterized in that
   the opening (5) is formed by a bore (9) on a side (7) facing away from the power tool (3) and the device (1) comprises a slot (10), on a side (8) facing the power tool (3), for receiving a hook (11), wherein the hook (11) is present on the power tool (3) and, in a fastened state, is engaged with a protrusion (12) of the insert part (6) for fastening the device (1) to the power tool (3).
2. Device (1) according to Claim 1,
   characterized in that
   the insert part (6) is transferable from the fastened state into an unfastened state by a rotation process.
3. Device (1) according to Claim 1 or 2,
   characterized in that
   the insert part (6) comprises a slot (13) for rotating the insert part (6) in the opening (5) of the device (1), wherein the slot (13) is arranged on a side of the insert part (6) that faces away from the protrusion (12).
4. Device (1) according to one of the preceding claims,
   characterized in that
   the insert part (6) has a cylindrical basic body.
5. Device (1) according to one of the preceding claims,
   characterized in that
   the device (1) comprises a basic body (14) which is formed by two mutually corresponding parts (14a, 14b).
6. Device (1) according to one of the preceding claims,
   characterized in that
   the device (1) has, in a front region (16), a cavity (15) for receiving the functional unit (2) for the power tool (3).
7. Device (1) according to Claim 6,
   characterized in that
   the front region (16) of the device (1) has a trapezoidal basic shape.
8. Device (1) according to Claim 6 or 7,
   characterized in that
   the cutout (4) for forming a dovetail connection is present on a rear side of the front region (16) of the device (1).
9. Device (1) according to one of the preceding claims,
   characterized in that
   the cutout (4) narrows in its profile to form a dovetail connection.
10. Device (1) according to one of the preceding claims,
    characterized in that
    the device (1) comprises at least one switch (17) for controlling the functional unit (2) for the power tool (3).
11. Device (1) according to one of the preceding claims,
    characterized in that
    the slot (10) for receiving the hook (11) of the power tool (3) has a non-parallel boundary edges.
12. Device (1) according to one of the preceding claims,
    characterized in that
    a part of the slot (10) is covered by an undercut (18) on the side (8) facing the power tool (3).
13. Device (1) according to one of the preceding claims,
    characterized in that
    a centring disc segment (19) is arranged in the opening (5) of the device (1), wherein the centring disc segment (19) has a guide opening (20), wherein a ring segment (21) of the centring disc segment (19) covers about 2/3 of a full circle.
14. Device (1) according to Claim 13,
    characterized in that
    the protrusion (12) of the insert part (6) is designed such that the protrusion (12) is movable in the remaining 1/3 of a full circle of the centring disc segment (19).
15. Method for fastening a receiving device (1) for a functional unit (2) to a power tool (3), wherein the proposed method comprises the following steps:

    a) providing a receiving device (1) in an unfastened state, wherein the unfastened state of the receiving device (1) is defined by a position of an insert part (6) in the receiving device (1),

    b) introducing a pin (22) of the power tool (3) into a cutout (4) in the receiving device (1),

    c) introducing a hook (11) of the power tool (3) into a slot (10) in the receiving device (1),

    d) rotating the insert part (6) within the receiving device (1) such that the receiving device (1) is transferred from an unfastened state into a fastened state and a connection between the power tool (3) and the receiving device (1) is achieved.

Images