TOOL DEVICE

Abstract

The invention relates to a tool device which is suitable for use with a machine tool, in particular a hand guided machine tool, having a driving device moving, in particular in an oscillating manner, around a driving axis. The tool device has an attachment device which allows it to be fastened on a machine tool such that its driving axis and an axis of rotation of the tool substantially coincide. The attachment device, for absorbing the driving force, has at least two driving area regions, which are spaced apart from said tool axis of rotation and each has a plurality of surface points. The tangent planes to said surface-area points are inclined in regard to an axial plane, which encloses the tool axis of rotation. Furthermore, said tangent planes are inclined regard to a radial plane which extends perpendicularly to the tool axis of rotation. This means that the torque introduced into the tool device by the machine tool, via the driving device, is reliably absorbed.

Claims

1-20. (canceled)

21. A tool device, which is suitable for use with a machine tool, and in particular suitable for use with a hand guided machine tool, which has a driving device moving around a driving axis, and in particular oscillating around the driving axis, and which has an attachment device by which it is fastened to a machine tool in such a manner that the driving axis and a tool axis of rotation are substantially coincident, wherein the attachment device, for receiving a driving force, comprises at least two driving area regions each having a plurality of surface points and which are spaced from this tool axis of rotation, wherein tangent planes are inclined on the surface points with respect to an axial plane, which includes the tool axis of rotation, and wherein the tangent planes are inclined with respect to a radial plane, which extends perpendicularly to the tool axis of rotation, wherein the attachment device comprises a cover area portion, wherein this cover area portion is directly or indirectly connected to at least one of these driving area regions, and wherein the cover area portion extends from the driving area regions in a radial direction towards the tool axis of rotation.

22. The tool device according to claim 21, wherein the tool device comprises, in the region of the attachment device, at least one first upper boundary plane and at least one second lower boundary plane, wherein these boundary planes are disposed substantially perpendicular to said tool axis of rotation, wherein the at least one first upper boundary plane and the at least one second lower boundary plane are spaced from each other, and wherein each of these driving area regions is arranged between a said at least one first upper boundary plane and a said at least one second lower boundary plane.

23. The tool device according to claim 22, wherein the cover area portion is disposed substantially in the region of one of these first upper boundary planes.

24. The tool device according to claim 21, wherein the cover area portion has at least one recess.

25. The tool device according to claim 24, wherein the recess or several of these recesses are arranged substantially in the region of the tool axis of rotation.

26. The tool device according to claim 24, wherein the recess or several of these recesses are arranged rotationally symmetrically around the tool axis of rotation.

27. The tool device according to claim 21, wherein at least one of the, preferably a plurality of the, and more preferably all of the driving area regions are, at least in sections, substantially planar or are, at least in sections, curved.

28. The tool device according to claim 22, wherein a plurality of the, preferably all of the driving areas regions extend between a single first upper boundary plane and a single second lower boundary plane.

29. The tool device according to claim 22, wherein the tool device, in particular in the region of the attachment device has a wall thickness of substantially (t), wherein at least a first boundary plane and a second boundary plane are spaced apart from each other by a distance (T), and wherein the distance (T) is greater than 1 times (t), preferably it is greater than 2 times (t), and more preferably it is greater than or equal to 3 times (t), and further preferably it is smaller than 20 times (t), preferably it is smaller than 10 times (t), and more preferably it is smaller than or equal to 5 times (t), and more preferably the distance (T) corresponds to essentially 3.5 times (t)+/0.75 times (t).

30. The tool device according to claim 21, wherein the at least two driving area regions are arranged rotationally symmetrically around the tool axis of rotation.

31. The tool device according to claim 21, wherein the at least two driving area regions are arranged symmetrically to a plane of symmetry, wherein the tool axis of rotation is located in this plane of symmetry, and preferably wherein these driving area regions are arranged substantially contiguously.

32. The tool device according to claim 21, wherein the attachment device comprises a side wall, wherein the side wall extends radially spaced from the tool axis of rotation, wherein the side wall extends between a first upper boundary plane and a second lower boundary plane, and wherein the side wall comprises the at least two driving area regions.

33. The tool device according to claim 32, wherein the side wall has an average wall thickness (t.sub.1), which is preferably greater than or equal to 0.2 mm, preferably greater than 0.5 mm, and more preferably greater than 0.8 mm, and further preferably said average wall thickness is less than or equal to 4 mm, preferably less than 2 mm and more preferably less than 1.5 mm, further more preferably substantially 1 mm or 1.5 mm, or preferably between 1 mm and 1.5 mm.

34. The tool device according to claim 32, wherein the side wall extends substantially radially closed around the tool axis of rotation.

35. The tool device according to claim 21, wherein a normal vector on one of these tangent planes is oriented away from the tool axis of rotation in the radial direction, and in particular wherein all of the normal vectors of these tangent planes are oriented away from the tool axis of rotation in the radial direction.

36. The tool device according to claim 21, wherein the tool device further comprises at least one operating region and at least one connection region, wherein the operating region is arranged to act on a work piece arrangement or on a work piece, and wherein the connection region is arranged between the attachment device and the at least one operating region.

37. The tool device according to claim 36, wherein the at least two driving area regions extend between a first upper boundary plane and a second lower boundary plane, wherein the at least one connection region is arranged substantially in the region of the second lower boundary plane, and wherein they preferably substantially coincide.

38. The tool device according to claim 36, wherein the cover area portion and the at least one operating region are arranged at different positions along the tool axis of rotation.

39. The tool device according to claim 21, wherein an angle () is enclosed between one of the tangent planes and the radial plane, wherein the angle () is smaller than 90 degrees, preferably smaller than 80 degrees, and more preferably smaller than 75 degrees, and wherein the angle () is larger than 0 degrees, preferably larger than 45 degrees, preferably larger than 60 degrees, and further preferably in a range from 62.5 degrees to 72.5 degrees, and/or wherein an angle () is included between one of these tangent planes and the axial plane, wherein the angle () is smaller than 90 degrees, preferably smaller than 70 degrees, and more preferably smaller than 65 degrees, and wherein the angle is larger than 0 degrees, preferably larger than 15 degrees, more preferably larger than 30 degrees, or substantially 30 degrees, 45 degrees or 60 degrees.

40. The tool device according to claim 21, wherein the attachment device has an even number of driving area regions, preferably 4 or more, or 8 or more, or 16 or more, and preferably 64 or less, or 48 or less, or 32 or less, or 24, and/or wherein the driving area regions are arranged substantially in a star-shaped manner, and preferably wherein the driving area regions are arranged substantially in the form of a star-shaped polygon, preferably with rounded portions at transition regions between the driving area regions.

41. A connection device which is suitable for connecting a tool device with a machine tool, in particular with a hand guided machine tool, which has a driving device moving around a driving axis, and in particular oscillating around the driving axis, wherein the connection device comprises a first connection region and a second connection region, wherein the first connection region is arranged for connecting the connection device with the machine tool, wherein the connection device can be connected to the machine tool in such a way that the driving axis and a connection axis of rotation substantially coincide, and wherein the second connection region is arranged for connecting the connection device with the tool device, wherein at least one of said connection regions comprises an attachment device as defined in claim 21.

42. The connection device according to claim 41, wherein the first connection region is arranged rotationally symmetrically to the connection axis of rotation, and/or wherein the second connection region is arranged rotationally asymmetrically or symmetrically to the connection axis of rotation.

43. The connection device according to claim 41, wherein the connection device comprises a first holding device, and wherein the first holding device is adapted to cooperate with at least said first connection region and the machine tool, and/or wherein the connecting device has at least one second holding device and the second holding device is arranged to cooperate with the second connection region and the machine tool.

44. The connection device according to claim 41, wherein the first holding device has a first holding shaft, wherein the second holding device has a second holding shaft, and wherein the first holding shaft and the second holding shaft are arranged substantially parallel, in particular congruent to each other, or askew, in particular skewed, with respect to each other.

45. A series of at least two tool devices in accordance with claim 41, and preferably: wherein each tool device of the series has a reference plane, wherein the reference plane is arranged perpendicular to the tool axis of rotation, wherein the reference plane has a reference diameter of the driving area regions, and wherein a distance () of a first surface of said cover area portion is located on the reference plane for several tool devices of a series between a first lower limit and a second upper limit, wherein the first lower limit is larger than 0.01 mm, preferably larger than 0.05 mm, and the second upper limit is smaller than 0.5 mm, preferably smaller than 0.1 mm, and/or wherein the distance () is substantially constant for different tool devices of the series, and/or wherein several types of the tool devices of the series have different wall thicknesses (t).

46. The series of at least two tool devices in accordance with claim 45, wherein each tool device has a keying region which is arranged with respect to its position substantially equally with respect to the tool axis of rotation and to the driving area regions, and wherein each tool device is characterized by at least one application parameter, in particular a driving power, and wherein the keying region comprises at least one keying device, which is characteristic for the at least one application parameter.

47. The series of at least two tool devices in accordance with claim 46, wherein at least a first tool device of the series has a first keying device which is provided to cooperate with a first keying element, which is preferably arranged on a first machine tool, wherein at least a second tool device has a keying device which is provided to cooperate with a second keying element, which is preferably arranged on a second machine tool, wherein the keying devices and the keying elements are designed in such a way that the first keying element can cooperate with the first keying device and the second keying device, and wherein the second keying element can cooperate only with the second keying device but not with the first keying device.

48. The series of at least two tool devices in accordance with claim 46, wherein the shape of a base area of at least one, preferably of all keying devices is selected from a group of shapes consisting of: a polygon having a plurality of corners, preferably 3, 4, 5, 6, 7, 8 or more corners, which are preferably rounded, a circle, an ellipse, an arc with a variable radius or a constant radius, and a combination of two or more of these shapes.

49. The series of at least two tool devices in accordance with claim 46, wherein at least two of the keying devices have the same geometric shape, but a different size.

50. The series of at least two tool devices in accordance with claim 46, wherein at least one of, and preferably all of the keying devices are designed as raised regions with respect to a keying reference plane, and wherein at least one dimension of the at least one keying device is larger than the respective dimension of the other keying device, or wherein at least one of, and preferably all of the keying devices are designed as recesses, and wherein at least one dimension of the at least one keying device is larger than the respective dimension of the other keying device.

51. The series of at least two tool devices in accordance with claim 46, wherein the keying regions are arranged in a region of the cover area portion.

52. A method of manufacturing a tool device according to claim 21, wherein the method includes: manufacturing a driving area region using a primary shaping process step, a reshaping process step, a generative process step, or a combination of several of the process steps, in particular wherein the process steps for manufacturing the driving area region are selected from a group consisting of: a forging, a pressing, a rolling, an extruding, a folding, a deep drawing, a beading, a flanging, a straightening, a bending, a stretching, a compressing, a sintering, a casting, and a layer by layer coating, and manufacturing a tool contour using a separating process step, a thermally separating process step, a mechanically separating process step, or a combination of several of the process steps, in particular wherein the process steps for manufacturing the tool contour are selected from a group consisting of: a sawing, a grinding, a milling, a punching, a shearing, a particle beam cutting, an electron beam cutting, a laser cutting, a plasma cutting, a flame cutting, and a spark erosion cutting.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0110] Here, the following are shown:

[0111] FIG. 1 shows a side view (FIG. 1a) and a plan view (FIG. 1b) of a tool device with two driving area regions.

[0112] FIG. 2 shows a side view of several driving area regions, which extend in each case between an upper boundary plane and a lower boundary plane.

[0113] FIG. 3 shows a side view of several driving area regions, which extend between a common upper boundary plane and a common lower boundary plane.

[0114] FIG. 4 shows a sectional view of a section of the tool device.

[0115] FIG. 5 shows a plan view (FIG. 5a) and a side view (FIG. 5b) of two contiguously arranged driving area regions.

[0116] FIG. 6 shows a plan view (FIG. 6a) and a side view (FIG. 6b) of a plurality of contiguously arranged driving area regions, these driving area regions being disposed circumferentially closed around the tool axis of rotation.

[0117] FIG. 7 is a sectional view of a section of a tool device with a cover area section.

[0118] FIG. 8 shows a plan view (FIG. 8a) and a side view (FIG. 8b) of a tool device with an operating region, a connection region and an attachment region.

[0119] FIG. 9 shows a sectional view of the tool device with a tangent plane on a surface point of the driving region with the angle of inclination a.

[0120] FIG. 10 shows a plan view of a portion of the tool device having a tangent plane on a surface point of the driving region and the inclination angle .

[0121] FIG. 11 shows a sectional view (FIG. 11a) and a plan view (FIG. 11b) of a tool device with a reference plane and an encoding device.

[0122] FIG. 12 shows a sectional view (FIG. 12a) and a plan view (FIG. 12b) of a tool device of the same series, as illustrated in the FIG. 11, but with a different encoding device.

[0123] FIG. 13 shows two sectional views of different types of encoding devices of the tool device.

[0124] FIG. 14 shows perspective views of differently curved driving area regions.

[0125] FIG. 15 shows a side view of a machine tool with a tool device.

[0126] FIG. 16 shows a plan view of a region of the tool device.

[0127] FIG. 17 shows a sectional view of a region of the tool device.

[0128] FIG. 18 shows a sectional view of a region of the output spindle and the tool device, which is accommodated in the machine tool.

[0129] FIG. 19 shows a sectional view, respectively (FIG. 19 a/b) and a plan view (FIG. 19 c/d) of two embodiments of the tool devices with a stepped driving area region.

[0130] FIG. 20 shows a sectional view (FIG. 20a) and a plan view (FIG. 20b) with a further tool device with the stepped driving area region.

[0131] FIG. 21 shows a sectional view (FIG. 21a) and a plan view (FIG. 21b) of a tool device with a raised driving area region.

[0132] FIG. 22 shows a sectional view of a tool device, the output spindle and a connection device with a first connection region and a second connection region.

[0133] FIG. 23 shows a sectional view of a tool device, the output spindle and a further embodiment of a connection device.

[0134] FIG. 24 shows a sectional view of another embodiment of a connection device, here with a frictional torque transmission from the connection device to the tool device.

[0135] FIG. 25 shows two cross-sectional views of further embodiments of the connecting device with a form fit torque transmission (FIG. 25a, a hollow body; FIG. 25b, a solid body).

DETAILED DESCRIPTION

[0136] The FIG. 1 shows two views (FIG. 1a front view, FIG. 1b plan view) of a tool device 1. This tool device has two driving area regions 2. Here, a driving area region 2 has several surface points 3. A tangent plane 4 can be assigned to each of these surface points 3 in the driving area regions 2. These tangent planes 4 are inclined in regard to a radial plane 6 and in regard an axial plane 7. Here, the radial plane 6 is arranged orthogonally to a tool axis of rotation 5 and an axial plane 7 encloses the tool axis of rotation 5a. The tool device 1 is provided for a rotationally oscillating driving of a hand guided tool device (not shown). If the tool device 1 is driven by a suitable machine tool then the tool device 1 is put into a rotating oscillating motion around the tool axis of rotation 5. By the dual inclination of the driving area region 2, it can be achieved a holding free from backlash of the tool device 1 in the machine tool. This is particularly advantageous for a sawing operation and a grinding operation or the like, since here varying loads act on the tool device 1 with respect to the tool axis of rotation 5, and a lost motion connection between the machine tool and the tool device 1 may result to the knocking out of the connection, and thus in particular it may result into a damaging of the tool device 1.

[0137] The FIG. 2 shows a view of the tool device 1, in which it can be seen that the driving area region 2 extends between each of an upper boundary planes 8a and a lower boundary planes 8b. These boundary planes 8 are preferably arranged orthogonally to the tool axis of rotation 5. In this case, in each case the driving area region 2 extends from the upper boundary plane 8a to the lower boundary plane 8b or vice versa. Preferably, here, the lower boundary plane 8b is located at the level of an operating region 13. Here, an operating region should be understood as an example as a saw tooth, as a saw blade or the like. Thereby, the lower boundary planes 8b is arranged substantially at the level of the operating region 13, a particularly deformation poor transmission of the driving forces of the driving area regions 2 on the operating region 13 is possible. By the different boundary planes 8, and thus by the different extensions of the driving area regions 2, a particularly good adaptability to the requirements of the tool device is provided, in particular with regard to the space requirements, to the backlash and to the torque transmission. In the present case, the lower boundary planes 8b coincides with a common lower boundary plane 8b. The upper boundary planes 8a do not coincide in this embodiment, resulting into driving area regions 2 of different heights.

[0138] The FIG. 3 shows a view of the tool device 1, in which all the driving area regions 2 are delimited by a single lower boundary plane 8b and a single upper boundary plane 8a. These boundary planes 8 are arranged perpendicular to the (fictional, geometric) tool axis of rotation 5. The lower boundary planes 8b is arranged substantially at the level of the operating region 13. In the direction of the tool axis of rotation 5, the upper boundary plane 8a is spaced away from the lower boundary plane 8b. If all of the driving area regions 2 extend between a single upper boundary plane 8a and a single lower boundary plane 8b, then a particularly simple manufacture of the tool device is possible, and further a particularly uniform transfer of the forces from the machine tool (not shown) on the tool device 1 is possible.

[0139] The FIG. 4 shows a part of the tool device 1 in a sectional view. The tool device comprises a (fictional, geometric) tool axis of rotation 5. The tool device 1 can be driven rotationally oscillating around the tool axis of rotation 5. The driving area region 2 is arranged spaced apart to the tool axis of rotation 5, and it extends in the direction of the tool axis of rotation 5 between the lower boundary plane 8b and the upper boundary plane 8a. The upper 8a boundary plane and the lower boundary plane 8b are spaced apart by the distance T. Here, the distance T is depending on the thickness t of the wall, which also has the driving area region 2. By this dependence, a particularly favorable relationship between the stiffness of the driving area regions and their size is achieved.

[0140] The FIG. 5 shows different sectional views (FIG. 5a, top view; FIG. 5b front view) of the tool device 1. The tool device 1 has the tool axis of rotation 5. The driving area regions 2 are arranged symmetrically to a plane of symmetry 9. Here, the plane of symmetry 9 includes the tool axis of rotation 5. The driving area regions 2 are arranged contiguously and meet in a transition region 17. This transition region 17 is designed in dependence on the manufacturing process or on the stress in the force transmission to the tool device 1 and it may have a radius. The driving area regions 2 extend between the lower boundary plane 8b and the upper boundary plane 8a, and they are spaced apart from the tool axis of rotation 5. A symmetrical and in particular contiguous arrangement of the driving area regions 2 allows the design of a highly stable tool device 1, since the driving area regions 2 can support each other.

[0141] The FIG. 6 shows several partial views (FIG. 6a, top view; FIG. 6b front view) of the tool device 1. The tool device 1 has a tool axis of rotation 5, and a plurality of driving area regions 2, these driving area regions extend between the upper boundary plane 8a and the lower boundary plane 8b. The driving area regions 2 are each arranged contiguously to each other and form a radially closed side wall, which is circumferential around the tool axis of rotation 5. The driving area regions 2 are each inclined in regard to the radial plane 6 and in regard to the associated axial planes 7. By means of such a closed circumferential side wall, on the one hand, a particularly stable tool device can be achieved, and on the other hand, a particularly uniform driving force transmission from the machine tool (not shown) on the tool device 1 can be achieved.

[0142] The FIG. 7 shows a detail of the tool device 1 in a sectional view. The tool device 1 has the tool axis of rotation 5, the driving area region 2, and a cover area section 10. The tool device 1 can be driven around the tool axis of rotation in a rotating oscillating manner. The FIG. 7 shows that the driving area region 2 is inclined in regard to the radial plane 6. The driving area region 2 extends between the upper boundary plane 8a and the lower boundary plane 8b. The driving area region 2 abuts substantially immediately to the cover area section 10 in the region of the upper boundary plane 8a. By means of a thus arranged cover area section 10, a further stabilization of the driving area regions 2 can be achieved, and for the same size of the driving area regions 2, larger driving forces can be transmitted as without the cover area section 10.

[0143] The FIG. 8 shows several partial views (FIG. 8a plan view; FIG. 8b front view) of the tool device 1. This tool device 1 has the (fictional, geometric) tool axis of rotation 5, a plurality of driving area regions 2, and the cover area section 10. The operating region 13 of the tool device 1 is intended to act on a work piece or on a work piece arrangement (not shown). In each case, two driving area regions 2 are positioned abutting one another and are connected with a further pair of driving area regions 2 by means of a connection region 11. The driving area regions 2 are arranged with rotational symmetry and they extend in the direction of the tool axis of rotation 5 between the upper boundary plane 8a and the lower boundary plane 8b. The driving area regions 2 are inclined in regard to the radial plane 6 and in regard to the assigned axial planes 7. By the connection regions 11, the driving area regions 2 form the closed side wall, which is circumferential around the tool axis of rotation 5. By means of the illustrated rotationally symmetrical arrangement of the driving area regions 2, the tool device 1 can be offset in the machine tool (not shown), provided of an appropriate design of these, so that the tool device can machine a work piece or a work piece arrangement (not shown), which is even difficult to access.

[0144] The FIG. 9 shows a detail of the tool device 1 in a sectional view. The tool device 1 has the tool axis of rotation 5 and the driving area region 2. This driving area region 2 has several surface points 3. To each of these surface points 3, a tangent plane 4 can be assigned. The radial plane 6 is arranged orthogonal to the tool axis of rotation 5. The radial plane 6 includes an acute angle with the tangent plane 4. By this angle , and thus by the inclination of the tangent plane 4 against the radial plane 6, it is particularly easy to receive the tool device 1 without play on the machine tool, especially when the tool device 1 is held on the machine tool (not shown) with a clamping force 18 in the direction of the tool axis of rotation.

[0145] The FIG. 10 shows a detail of the tool device 1 in plan view, wherein the tool axis of rotation 5 can be seen merely as a point. The axial plane 7 includes the tool axis of rotation 5 and it can be seen as a straight line in the FIG. 10. To the surface point 3 of the driving area region 2, a tangent plane 4 can be assigned. The driving area regions 2 are positioned abutting one another and are spaced apart radially from the tool axis of rotation 5. The tangent plane 4 includes an acute angle with the axial plane 7. By the angle in conjunction with the angle , it is possible that the tool device 1 is centered in regard to the machine tool (not shown) when it is received in the machine tool.

[0146] The FIG. 11 shows multiple views (FIG. 11a cross-sectional view; FIG. 11b top view) of the tool device 1. The tool device 1 has the tool axis of rotation 5 and a plurality of driving area regions 2, which are arranged radially spaced apart therefrom. The driving area regions 2 are substantially planar. Further, these driving area regions 2 are arranged contiguously, forming a closed side wall, which is circumferential around the tool axis of rotation. The driving area regions 2 extend toward the tool axis of rotation 5 between the upper boundary plane 8a and the lower boundary plane 8b. In the region of the upper boundary plane 8a, the cover area section 10 is arranged. The cover area section 10 preferably has an encoding device 16. The encoding device 16 is preferably arranged as a circular recess in the tool axis of rotation. This circular recess has a first encoding diameter Kd_1. Other tool devices (not shown) of the same series, which, however, are provided for other drive ratings, may have further coding diameters (Kd_2, and so on) that are different from the Kd_1. The Kd_1 indicates for example a tool device 1 for a professional use, the Kd_2 (not shown) indicates a tool device for the do-it-yourself (DIY) use. Further, a lower section of the cover area section 10a has a distance to the reference plane 14. The position of the reference plane 14 is defined in such a way that it contains a reference diameter 15 (nominal outer diameter, nominal middle diameter, nominal inner diameter or the like). For different tool device of a series, in particular at different wall thicknesses t or also due to unavoidable tolerances in the manufacture of the tool device, different positions results based on the position in the direction of the tool axis of rotation 5, for nominally the same reference diameter 15. Starting from this position of the reference plane 14 in the direction of the tool axis of rotation 5, the tool device comprises a substantially constant distance from the lower cover area section 10a to this reference plane 14. Thereby that a plurality of tool devices of a series have a substantially constant distance between the lower cover area section 10a and the reference plane 14, a particular simple and safe accommodating is provided for the different tool devices 1 on the machine tool (not shown).

[0147] The FIG. 12 shows the same views of a tool device 1 as well as the FIG. 11. However, in the FIG. 12 another tool device 1 of the some series of tool device 1 is shown, which has been shown in the FIG. 11. Therefore, below are mainly discussed the differences between the tool device 1, which is shown in the FIG. 1, and the tool device 1, which is shown in the FIG. 12. In the cover area section 10 an encoding device 16 is arranged as a recess in the tool axis of rotation 5. This encoding device 16 includes an encoding diameter Kd_2, while the encoding diameter Kd_2 is smaller than the encoding diameter Kd_1 (FIG. 11). The encoding device 16 is configured to cooperate with a second encoding element (not shown), which is arranged on the machine tool (not shown). By such a design of the encoding means 16 in a series of tool devices, it is possible to reserve specific tool devices 1 for certain machine tools, and thus to enable a safe operation.

[0148] The FIG. 13 shows various illustrations of the different tool devices 1, particularly with regard to the encoding device 16. The FIG. 13a shows a detail of a tool device 1 with a raised encoding device 16a. The FIG. 13b shows a tool device 1 with a encoding device 16b which is designed as a recess. For both encoding devices 16a/b it is common that they are arranged in the region of the cover area section 10 of the tool device 1. The tool device 1 comprises a plurality of driving area regions 2, which are arranged spaced apart from the tool axis of rotation 5.

[0149] The FIG. 14 shows different sections of a driving area region 2 of the tool device. Not shown is a planar driving area region, such a driving area region is also preferably possible. The FIG. 14a shows a unidirectionally curved section of the driving area region 2. This section of the driving area region 2 can be described by the straight lines a and by the curved grid lines b.sub.I. The curved grid lines b.sub.I have a constant radius of curvature R.sub.I. Such a driving area region 2 corresponds to, in sections, a cylinder jacket surface, as far as several different radii of curvature R.sub.I are provided, it corresponds to a conical surface (not shown). In this case, the size of the radius of curvature R.sub.I is selected in such a way that the driving area region 2 changes in sections during the transmission of the driving forces to a plane or that it adapts to the opposite surface (not shown) which cooperates with it to transmit the driving forces. The FIG. 14b shows a section of the driving area region 2 with a bidirectional curvature. This section of the driving area region 2 can be described by the curved grid lines b.sub.I and by the curved grid lines b.sub.II. The grid lines b.sub.I have the constant radius of curvature R.sub.I and the grid lines b.sub.II have the constant radius of curvature R.sub.II. Such a driving area region 2 corresponds to, for the special case that the first radius of curvature R.sub.I and the second radius of curvature R.sub.II are of the same size, a spherical surface. In the FIG. 14b a driving area region 2 with different radii of curvature R.sub.I and R.sub.II are shown. In this case, the size of the radii of curvature R.sub.I and R.sub.II can be selected such that the driving area region 2 at least partially changes during the transmission of the driving forces to a plane or that it adapts it to the counter surface (not shown) which cooperates with it to transmit the driving forces. The FIG. 14c shows a section of one driving area region 2 with the bidirectional curvature. This section of the drive surface area 2 can be described by the grid lines b.sub.I having a constant radius of curvature R.sub.I and by the grid lines b.sub.Ia having a variable radius of curvature R.sub.Ia. In such a driving area region 2, also all the grid lines can have a variable radius of curvature (not shown). The size of the radii of curvature R.sub.Ia and R.sub.II can be selected in such a way that the driving area region 2 changes during the transmission of the driving forces in sections to a plane or that it adapts it to the counter surface (not shown) which cooperates with it to transmit the driving forces. In the FIG. 14, a concave curved driving area region 2 is shown, the expressed considerations can be transferred to a convex curved driving area region, accordingly.

[0150] The FIG. 15 shows a tool device 1 which is accommodated in a machine tool 22. The tool device 1 comprises an attachment device 12, by which it is connected to the machine tool 22. The machine tool 22 has an output spindle 22a, which introduces the driving forces into the tool device 1, in particular into its attachment device 12. The output spindle 22a moves around the machine tool axis of rotation 22c, in particular rotationally oscillating, thereby also the tool device 1 is brought in a similar motion. The tool device 1 has an operating region 13, which is adapted to act on a work piece or a work piece arrangement (not shown). The driving forces of the machine tool 22 are transmitted to the operating region 13 by the tool connection region 11 of the attachment device 12. The machine tool 22 has an operating lever 22b, which is adapted to permit a change of the tool device 1.

[0151] The FIG. 16 and the FIG. 17 show a tool device 1 in different views. The FIG. 16 shows a plan view and the FIG. 17 shows a sectional view of the tool device 1. The shown attachment device 12 of the tool device 1 is shown in the FIGS. 16 and 17 as a star-shaped polygon with rounded corners (connection regions 11). Here, the below discussed interrelationships can be applied least mutatis mutandis to other forms of such an attachment device 12.

[0152] In the plan view, FIG. 16, the rounded corners (connection regions 11) of the polygon can be seen. A so-called arm of the polygon is formed by two the driving area regions 2 and by the connection region 11. The individual arms are offset by an equidistant angle k12 to each other. Preferably, the, preferably equidistant, angle k12 results from the relationship: Full circle/(number of arms)=k12; for the present case 360 degrees/12=30 degrees. Preferably, by the equidistant angle k12, it is possible to accommodate the tool device 1 in different rotational positions in the machine tool. In present case, the tool device (not shown) can be offset in discrete steps of 30 degrees in regard to the machine tool.

[0153] The tool device 1 has in its cover area section 10 a, preferably circular, recess with a diameter k10. Further preferably, for this recess, forms are also possible differing from the circular shape.

[0154] Preferably, this recess has a substantially circular shape and it may have additionally recesses, preferably polygonal recesses or preferably spline-like recesses, which extend starting from the circular recess, preferably extending radially outward. Preferably, by these recesses, a star-like polygon is obtained having preferably circular sections. Particularly advantageously, such recesses may be used for tool devices, which are intended particularly for high loads, especially in diving saw blades or the like.

[0155] Further preferably, the diameter k10 corresponds to one of the diameters kd_1 or kd_2 for the tool devices of a series of at least two tools. This recess in the cover area section 10 is preferably adapted such that the tool devices 1 is held on the machine tool. Preferably, this recess should be understood as a through-recess/through-hole of a holding device (not shown), in particular of a screw device. The choice of the diameter k10 can depend on various parameters, preferably on the dimension of the holding device (not shown) of the machine tool. This holding device is particularly dimensioned in such a way that the tool device 1 is held securely on the machine tool.

[0156] The diameters k2 and k3 describe the outer diameters of the attachment device. In a preferred embodiment, the outer diameter of k2 is preferably selected from a range between 30 mm and 36 mm, preferably from 32 mm to 34 mm, particularly preferred the outer diameter k2 is substantially 33.35 mm (+/0.1 mm).

[0157] In a preferred embodiment, the outer diameter k3 is preferably selected from a range between 22 mm and 27 mm, preferably from 24 mm to 26 mm, particularly preferably the outer diameter k3 is substantially 25 mm (+/0.1 mm).

[0158] The distance k1 defines the distance of the two driving area regions 2, which are in this view parallel to each other (in a spatial view, the driving area regions 2 are inclined to each other). Compared with a screw head (for example, a hexagon or square) the distance k1 corresponds to a key width.

[0159] In a preferred embodiment, this key width k1 is preferably selected from a range between 26 mm and 30 mm, preferably from a range between 27 mm and 29 mm, more preferably, the key length is substantially 28.4 mm (+/0.1 mm).

[0160] The diameter 15 indicates a reference diameter for the attachment device 12 of the tool device 1. In a preferred embodiment, the reference diameter 15 is preferably selected from a range between 31 mm and 33 mm, preferably from a range between 31.5 mm and 32.5 mm, and particularly preferably the reference diameter 15 is substantially 32 mm (+/0.1 mm). Here, the reference diameter 15 is further preferably characterized in that the at least two different tool devices of a series of toolsseen in the direction of the tool axis of rotation 5are substantially at the same level (+/0.1 mm).

[0161] In the sectional view (FIG. 17), in particular the cross-sectional area of the attachment device 12 is particularly well recognizable. In a preferred embodiment, the tool device 1 has in the region of its attachment means 12 a, preferably substantially constant, wall thickness t1. More preferably, this wall thickness t1 is selected from a range between 0.75 mm and 1.75 mm, preferably it is selected from a range of 1 mm to 1.5 mm, and more preferably the wall thickness t1 corresponds to substantially 1.25 mm (+/0.1 mm).

[0162] It has been found that especially a long service life for the tool device 1 can be achieved if certain transitions are rounded at the attachment device 12 of the tool device 1 (preferably, the radii: k6, k7, k8, k9).

[0163] In a preferred embodiment, at least one of the radii k6, k7, k8, and k9, preferably several of them, more preferably all of them are oriented on the wall thickness t1. Here, preferably from a larger wall thickness t1 follows an enlargement of these radii, preferably at least of the radii k7 and k9.

[0164] In a preferred embodiment (wall thickness t1=1.25 mm), the radius k6 is preferably selected from a range between 1 mm and 2.5 mm, preferably it is selected from a range between 1.5 mm and 2.1 mm, and particularly preferably the radius k6 is substantially 1.8 mm (+/0.1 mm).

[0165] In a preferred embodiment (t1=1.25 mm), the radius k7 is selected from a range between 0.5 mm and 1.5 mm, preferably it is selected from a range between 0.8 mm and 1.2 mm, and particularly preferably the radius k7 is substantially 1 mm (mm+/0.1).

[0166] In a preferred embodiment (t1=1.25 mm), the radius k8 is selected from a range between 0.2 mm and 0.6 mm, preferably it is selected from a range between 0.3 mm and 1.5 mm, and particularly preferably the radius k8 is substantially 0.4 mm (+/0.05 mm).

[0167] In a preferred embodiment (t1=1.25 mm), the radius k9 is selected from a range between 2 mm and 3.5 mm, preferably it is selected from a range between 2.4 mm and 3 mm, and particularly preferably the radius k9 is substantially 2.7 mm (+/0.1 mm).

[0168] The driving area regions 2 are inclined in the illustration of the FIG. 17 by the angle k13 in regard to an imaginary vertical line (parallel to the tool axis of rotation 5). In a preferred embodiment, this angle is selected from a range between 10 degrees and 30 degrees, preferably it is selected from a range between 17.5 degrees and 22.5 degrees, and more preferably the angle k13 is substantially 20 degrees (+/0.5 degrees).

[0169] Further preferably, the other dimensions of the tool device depend on the wall thickness t1, more preferably at least the radii k6, k7, k8, and k9, wherein a larger wall thickness t1 tends to lead to larger radii k6, k7, k8, and k9, preferably at least to larger radii k9 and k6.

[0170] The diameter k2 preferably indicates the region of the driving area regions 2, from which it extends in a straight line. After this rectilinear extension, the driving area regions extend, preferably into the radius k9, and then into the cover area section 10.

[0171] Preferably, the measure k5 and the radius k7 are interdependent. More preferably, the measure k5 is selected from a range between 0.1 mm and 1 mm, preferably it is selected from a range between 0.3 mm and 0.7 mm, and particularly preferably the measure k5 is substantially 0.5 mm (+/0.1 mm).

[0172] The radius k6 is preferably facing the radius k7 and it is larger than this. Also the radius k9 and the radius k8 are facing each other preferably, more preferably, the radius k8 is smaller than the radius k9.

[0173] In a preferred embodiment, the driving area regions 2 extend at a level (the direction is parallel to the tool axis of rotation) at least for the measure k14 substantially in straight line. Here, a straight line according to the invention should be understood in that it has no significant curvature, preferably standing in the unloaded condition, more preferably in a loaded condition. Preferably, the measure k14 is selected from a range between 1 mm and 3.5 mm, preferably it is selected from a range between 1.5 mm and 2.5 mm, and particularly preferred the dimension k14 is substantially 2 mm (+/0.25 mm). Preferably, the measure k14 should be understood as the shortest linear course of the driving area regions 2.

[0174] The recess in the cover area section, which is preferably adapted to cooperate with the holding device (not shown) of the machine tool (not shown) has the diameter k10. The recess with the diameter k10 is not necessarily a circular recess as shown in the FIG. 16 and the FIG. 17, but this recess may, independently from the remaining appearance of the tool device 1, also have a different shape (polygon or the like).

[0175] In a preferred embodiment, the attachment region 12 has a depth k11, more preferably, the depth k11 is selected from a range between 3.5 mm and 6 mm, preferably it is selected from a range between 4.5 mm and 5 mm, and particularly preferably the depth k11 is substantially 4.7 mm (+0.15 mm).

[0176] In a preferred embodiment, the attachment region 12 has a height k15, further preferably the height k15 is selected from a range between 4.5 mm and 7.5 mm, preferably it is selected from a range between 5.5 mm and 6.5 mm, and more preferably the height k15 is substantially 6 mm (+/0.2 mm).

[0177] The FIG. 18 shows a tool device 1, which by means of a screw device (fixing screw 9d, washer 9e, nut member 9f) is attached to the output spindle 22a of the machine tool. The tool device 1 has an operating region 13 to act on a work piece or on a work piece arrangement. From the tool driving area region 2, the driving forces are transmitted to the operating region 13. In this case, the tool device 1 is held by means of the fastening screw 9d, which exerts its force action by the washer 9e to the tool device 1 on of the machine tool. The transmission of the driving forces from the machine tool to the tool device 1 is achieved substantially by the form fit engagement of the driving area region 2 in the counter surfaces in the output spindle 22a. The output spindle 22a is rotationally driven by the oscillating machine tool rotation axis 22c, and transmits this motion to the tool device 1, so that this moves oscillating rotationally around the tool axis of rotation 5. The tool device 1 is held on the machine tool in such a way that the tool axis of rotation 5 and the machine tool axis of rotation 22c are substantially coincident.

[0178] The FIG. 19 shows two versions of a tool device 1 having with stepped driving area region 2a. This drive surface portions 2a are arranged above the cover area section 10, and preferably they are non-rotatably connected with it, preferably by a form fit locking or a material fit locking, and more preferably welded, riveted, screwed or the like. Here, the FIG. 19 a) and b) each shows a sectional illustration. The FIGS. 19 c) and d) each show a plan view from above of such a tool device 1. The illustration of the tool device 1 in the FIG. 19 is based substantially on the illustration of the FIG. 18, but it is not limited to it. Therefore, below are addressed primarily the differences between them.

[0179] In a tool device 1, as it is shown in the FIGS. 19 a) and c), the angle is substantially equal to 90 degrees. Thereby, it advantageously allows an easy manufacture of the tool device. In the tool device 1, as this is illustrated in the FIGS. 19 b) and d), the angle is substantially less than 90 degrees. Thereby, advantageously, a larger transmission area for the torque transmission can be achieved.

[0180] Next, the FIG. 19 shows how the tool device 1 is attached to the output spindle 22a of the machine tool, preferably by means of a screw device (fixing screw 9d, washer 9e, nut member 9f). The tool device 1 has an operating region 13 to act on a work piece or on a work piece arrangement. By means of the fastening device between the tool device 1 and the output spindle 22a, here preferably designed as a screw device (mounting screw 9d, washer 9e, female connection 9f), the tool device 1 is received on the machine tool and a force is exerted in the direction of the tool axis of rotation 5.

[0181] If the tool device is received as scheduled in the machine tool, a small distance is obtained between one of the output spindle 22a facing surface of the tool device 1 and a front surface 22d of the output spindle 22a. Preferably, the small distance should be understood as a small distance which is in a range, preferably it is smaller than 5 mm, preferably it is smaller than 2.5 mm, and more preferably it is smaller than 1, 5 mm, and most preferably it is smaller than 0.8 mm. Further preferably, this range is larger than 0.0 mm, preferably it is larger than 0.25 mm, and most preferably it is larger than 0.5 mm.

[0182] From the stepped driving area regions 2a, the driving forces are transmitted to the operating region 13. In this case, the tool device 1 is held on the machine tool by means of the washer 9e, which exerts a force action by means of the fastening screw 9d on the tool device 1. The transmission of the driving forces of the machine tool on the tool device 1 is achieved primarily by the form fit engagement (form fit connection) to the stepped driving area region 2a in the opposite surfaces in the output spindle 22a. The output spindle 22a is rotationally driven by the oscillating machine tool rotation axis 22c, and transmits this motion to the tool device 1, so that it moves rotationally oscillating around the tool axis of rotation 5. The tool device 1 is held on the machine tool in such a way that the tool axis of rotation 5 and the machine tool axis of rotation 22c are substantially coincident.

[0183] The FIG. 20 shows a further variant of a tool device 1 with the stepped driving area regions 2a. The stepped driving area regions 2a are preferably substantially above, preferably directly above the operating region 13 in the direction of the output spindle 22a, and respectively preferably they are arranged on a surface of the tool device 1. Further preferably, this surface of the tool device is adapted to lie opposite to the end face 22d of the output spindle 22a, when the tool device is received by the machine tool. The driving area regions 2a are preferably rotationally fixedly connected to the tool device 1, preferably by a form fit locking or a material fit locking, more preferably welded, riveted, screwed or the like, or particularly preferably configured integral. The FIG. 20 a) shows a sectional view, the FIG. 20 b) shows a plan view from above of such a tool device 1. It can be seen in the plan view (FIG. 20b) that the stepped driving area regions 2a are distributed in a star-shaped manner around the tool axis of rotation. The illustration of the tool device 1 in the FIG. 20 is based primarily on the illustration of the FIG. 18 and the FIG. 19, but it should be not limited to these. Therefore, below are addressed primarily the differences between them.

[0184] Next, the FIG. 20 shows how the tool device 1 is attached to the output spindle 22a of the machine tool, preferably by means of a screw device (fixing screw 9d, washer 9e, nut member 9f). The tool device 1 has an operating range 13 to act on a work piece or on a work piece arrangement. By means of the fastening device, here preferably configured as a screw device (fixing screw 9d, washer 9e, female connection 9f) between the tool device 1 and the output spindle 22a, the tool device 1 is received in the machine tool, and a force is exerted in the direction of the tool axis of rotation 5.

[0185] When the tool device is received as scheduled in the machine tool, a small distance is obtained between one of the output shaft 22a facing surface of the tool device 1 and the end face 22d of the output shaft 22a. Preferably, the small distance is in the range as it is proposed in the embodiment of the FIG. 19.

[0186] The holding of the tool device as well as the transmission of the driving forces on the tool device is performed in the same manner as in the embodiment shown the FIG. 19.

[0187] In a further embodiment, at least one stepped driving area region 2a can be arranged below the top surface section (FIG. 19) and the above tool surface (FIG. 20), which faces the machine tool in the area of the output spindle 22c, preferably it the stepped driving area region 2a is spaced both below from the cover area section and above from the aforementioned range of the tool surface. This embodiment can be visually perceived as an intermediate variant compared to the embodiments shown in the FIG. 19 and the FIG. 20. Further preferably, the stepped driving area region 2a can be formed integrally with at least a portion of the tool device 1 or, preferably, as a separate component, as shown in the FIG. 19 and the FIG. 20, be connected to the tool device 1. The stepped driving area region and the tool device are preferably cohesively, non-positively or positively at such a connection, preferably welded, soldered, riveted, screwed or glued.

[0188] The FIG. 21 shows an embodiment of a tool device 1 having raised driving area regions 2b. The FIG. 21 a) shows a sectional view of such a tool device, the FIG. 21 b) shows the corresponding top view of the tool device 1. These raised driving area regions 2b can preferably have cylindrical portions, as shown in the FIG. 21. Further preferably, it can be carried out alternatively as truncated cones or else preferably as sections with a polygon-shaped cross-section. The shape of the raised driving area regions 2b is preferably independent of the rest of the design of the tool device.

[0189] This drive surface areas 2b are preferably arranged substantially above the operating region 13 in the direction of the output spindle 22a, or on a surface of the tool device 1. Further preferably, this surface of the tool device is adapted to lie opposite to the end face 22d of the output spindle 22a, if the tool device 1 is received in the machine tool. The driving area regions 2b are preferably rotatably connected to the tool device 1, preferably form fit or material fit, especially preferably welded, riveted, screwed or the like, or most preferably configured integral. In this case (FIG. 21b), it can be seen in plan view that the raised driving area regions 2b are distributed preferably rotationally symmetrical, more preferably at an equidistant distance or an integer multiple of an equidistant distance, around the tool axis of rotation. The illustration of the tool device 1 in the FIG. 21 is based primarily on the illustration of the FIG. 18 to FIG. 20, but it should be not limited to this.

[0190] Next, the FIG. 21 shows how the tool device 1 is attached to the output spindle 22a of the machine tool, preferably by means of a screw device (fixing screw 9d, washer 9e, nut member 9f). The tool device 1 has an operating region 13 to act on a work piece or on a work piece arrangement. By means of the fastening device, here preferably as a screw device (fixing screw 9d, washer 9e, female connection 9f) configured between the tool device 1 and the output spindle 22a, the tool device 1 is received on the machine tool and a force is exerted in the direction of the tool axis of rotation 5.

[0191] When the tool device is received as scheduled in the machine tool, a small clearance is obtained between the output spindle 22a facing surface of the tool device 1 and the end face 22d of the output spindle 22a. The distance is preferably in the range as it is proposed in the embodiment of the FIG. 19.

[0192] The holding of the tool device is performed in the same manner as in the embodiment shown in the FIG. 19. In the embodiment (FIG. 21) with raised driving surface regions 2b these engage in corresponding mating surfaces on the machine tool, and the transmission of the driving forces on the tool device is performed in a form fit manner.

[0193] The FIG. 22 shows a sectional view of a connection device 1a for the connecting of a third tool device 1b with an output spindle 22a of the machine tool. The connection device 1a is held to the output spindle 22a and thus to the machine tool by means of a first holding device 30. The holding device 30 preferably has a fastening screw 9d and a washer 9e, a nut member 9f is disposed in the output spindle 22a. The connection device 1a is received at the output spindle 22a in such a way that a small distance is obtained between an end face 22d of the output spindle 22a and a surface of the connection device facing of the tool device, preferably the surface opposite to the end face 22d. By the short distance, it can be achieved a secure receiving of the connection device 1a at the output spindle 22a. At the connection device 1a, a third tool device 1b can be attached by means of a second holding device 31. The second holding device 31 comprises a second holding shaft 31a, the first holding device 30a has a first holding shaft 30a. The first holding shaft 30a substantially coincides with the connection axis of rotation. The first holding shaft 30a and the second holding shaft 31a are arranged obliquely to each other. The third tool device 1b has a operating region 13, this operating region 13 is adapted to act on a work piece arrangement.

[0194] For a form fit torque transmission, the connection device 1a comprises an attachment device with driving area regions 2. The driving area regions 2 are engaged with the output spindle 22a in counter surfaces. By this form fit engagement, the driving forces are safely transmitted from the output spindle 22a driven by the machine tool axis of rotation 22c in a rotating-oscillating manner to the connection device 1a, and thus to the second tool device.

[0195] The connecting device 1a is connected in a first connection region 32a with the machine tool, and a holding force acting on the connection device 1a is preferably applied in the direction of the first holding shaft 30a, or respectively a movement of the connection device 1a in the direction of the first holding shaft is, at least partially, prevented. Further, the third tool device 1b can be connected in a second connection region 32b of the connection device 1a. In this case, this connection can be a form fit connection, preferably a material fit connection, or more preferably a force fit connection. Preferably, in the direction of the second holding shaft 31a, a holding force is exerted on the tool device 1b or on the connection device 1a, respectively. Preferably, the second holding device 31 comprises a screw device, more preferably for applying the holding force effect.

[0196] The FIG. 23 shows a sectional view of a connection device 1a, which is similar to the connection device shown in the FIG. 22. Therefore, below are addressed primarily the differences between these two connection devices.

[0197] The third tool device 1b is held on the connection device 1a by means of the second holding device 31. The second holding device 31 exerts in the direction of the second holding shaft 31a a holding force effect of the third tool device 1b, and preferably also on the connection device 1a. The tool device 1 we connected via the second connection portion 32b to the connecting means 1 a. In this case, this connection can be preferably a form fit connection, preferably a material fit connection, or more preferably a force fit connection. The second support shaft 31 a is oriented substantially parallel to the first support shaft 30a, more preferably, the first and second supporting shaft spaced from each other.

[0198] The FIG. 24 shows a sectional view of a connecting device, which essentially corresponds to that of FIG. 22 and also of the connecting device shown in FIG. 23. The following will therefore focus on the differences between these embodiments.

[0199] The third tool device 1b is held by means of the first holding device 30 and the second connection region 32b of the connection device 1a. The first holding device 30 exerts in the direction of the first holding shaft 30a of a holding force on the third tool device 1b, and preferably also on the connection device 1a. This connection may be preferably a form fit connection, preferably a material fit connection, or more preferably a force fit connection. Further preferably, said third tool device and said connecting device comprise raised recesses sections, preferably, these raised sections are in connection with these recesses for a form fit torque transmission from the connecting device 1a to the third tool device 1b.

[0200] The FIG. 25a shows a sectional view of a connection device with form fit torque transmission from the connection device on the tool device. The connecting device is at least partially formed as a hollow body, and thereby it has, in particular a low moment of inertia. Both the embodiments illustrated in the FIG. 25a and in the FIG. 25b are similar to the previously described embodiments of the connection device. Therefore, below are addressed primarily the differences between these two connection devices.

[0201] The tool device 1 is held on the output shaft 22a of the machine tool by means of a first holding device 30, in particular a fastening screw 9d, a washer 9e and nut member 9f. The torque transmission from the connection device on the tool device 1 is at least partly achieved by means of the form fitting elements 33rd. The form fitting elements 33 may preferably be integrally formed with the connection device, or preferably as own components inserted into these, or fixed to these.

[0202] The connection device is received in the axial direction, i.e. in the direction of the machine tool axis of rotation 22c in such a manner that a small distance is obtained. Thereby, it can be achieved that the connection device can be held on the machine tool, as far as the tool device is severely stressed, in particular by bending momentums perpendicular to the tool axis of rotation. In particular, by this holding, a tilting of the tool device can be counteracted, and the connection device and with it the tool device can be particularly securely received on the machine tool.

[0203] The connection device may preferably be composed of several parts, particularly preferably the base body is composed of the two parts 34 and 35. Thereby, it can be achieved that the connection device has on the one hand a low weight (hollow body), and that on the other hand it consist of parts which are relatively simple to produce.

[0204] Further preferably, these several parts can be connected to one another at one or several connection points 36 in a material fit manner. By such a configuration of the connection device, a particularly easy connection device can be achieved, which in particular due to low forces of inertia only a low stress induce.

[0205] Next, the tool device 1 is accommodated on the output spindle 22a by means of the connection device in such a way that the tool axis of rotation 5 and the machine tool axis of rotation 22c are substantially coincident. The connecting device is connected in a first connecting portion 32a with the output spindle 22a of the machine tool. Furthermore, the tool device 1 is connected in a second connection region 32b to the connection device. In this case, the drive torque is transmitted to the connection device (first connection portion 32a) from the machine tool by means of the driving area region 2 in form fit matter.

[0206] The form fitting elements 33 (FIG. 25a/b) are preferably spaced apart to the tool axis of rotation 5. Furthermore, these are offset around the tool axis of rotation preferably by an equidistant angle or, preferably, by an integer multiple of such an angle. Further preferably, the form fitting elements 33 or a plurality of groups of the form fitting elements are arranged with rotational symmetry around the tool axis of rotation.

[0207] The tool device 1 has an operating region 13, which is adapted to act on a work piece or on a work piece arrangement (not shown).

[0208] The FIG. 25b shows a sectional view of a connection device with form fit torque transmission from the connection device on the tool device 1 (second connection portion 32b). Here, the connection device is, unlike for the embodiment shown in the FIG. 25a, formed essentially as a solid body and it has, in particular a high form stability, and it is particularly easy to manufacture. The embodiment illustrated in the FIG. 25b corresponds essentially to the embodiment shown in the FIG. 25a. Therefore, below are addressed primarily the differences between these embodiments.

[0209] The tool device 1 is held on the output spindle 22a of the machine tool by means of a first holding device 30, which has in particular a fastening screw 9d, a washer 9e, and a nut member 9f. The torque transmission from the connection device to the tool device 1 is at least partly achieved by means of the form fitting elements 33.

[0210] The connection device is received in the axial direction, i.e. in the direction of the machine tool axis of rotation 22c in such a way that a small distance is obtained, whereby a particularly secure receiving of the tool device on the machine tool can be achieved.

[0211] The connection device, in particular its base body, may preferably be formed integral, preferably at least the base body of the connection device is produced by a primary shaping manufacturing method or by a reshaping manufacturing method such as these have already been described also for the manufacturing of the tool device, preferably a forging, a sintering, generative manufacturing processes and the like.

[0212] By means of the connection device, the tool device 1 so received on the output spindle 22a, that the tool axis of rotation and the machine tool axis of rotation substantially coincide. The connecting device is connected in a first connecting portion 32a with the output shaft 22a. Further, the tool device 1 is connected in a second connection region 32b to the connection device. In this case, also the driving torque is transmitted from the machine tool to the connection device by the driving area regions 2 in a form fit manner.

[0213] The tool device 1 has an operating region 13, which is adapted to act on a work piece or on work piece arrangement (not shown).

LIST OF REFERENCE SIGNS

[0214] 1 tool device [0215] 1a connection device [0216] 1b second tool device [0217] 2 driving area region/tool driving area region [0218] 2a stepped driving area region [0219] 2b raised driving area region [0220] 3 surface point [0221] 4 tangent plane [0222] 5 tool axis of rotation [0223] 6 radial plane [0224] 7 axial plane [0225] 8 boundary plane [0226] 8a upper boundary plane [0227] 8b lower boundary plane [0228] 9 plane of symmetry [0229] 9d fastening screw [0230] 9e washer [0231] 9f nut member [0232] 9g tie bar device [0233] 10 cover surface section [0234] 10a lower section of the cover surface section [0235] 11 connection region [0236] 12 attachment device [0237] 13 operating region [0238] 14 reference plane [0239] 15 reference diameter [0240] 16 encoding device [0241] 16a raised encoding device [0242] 16b encoding device having a recess [0243] 17 transition region [0244] 22 machine tool [0245] 22a output spindle [0246] 22b operating lever [0247] 22c machine tool axis of rotation [0248] 22d end face of the output spindle [0249] 30 first holding device [0250] 30a first holding shaft [0251] 31 second holding device [0252] 31a second holding shaft [0253] 32a first connection region [0254] 32b second connection region [0255] 33 form fit element [0256] 34 first subcomponent of the connection device [0257] 35 second subcomponent of the connection device [0258] 36 connecting region between 34 and 35 [0259] a first inclination angle [0260] second inclination angle [0261] t thickness of the side wall [0262] T extension of a driving area region [0263] R.sub.I first radius of curvature of a driving area region [0264] R.sub.Ia variable radius of curvature of a driving area region [0265] R.sub.II second radius of curvature of a driving area region [0266] a straight extending grid line of a driving area region [0267] b.sub.I first curved grid line of a driving area region [0268] b.sub.II second curved grid line of a driving area region [0269] b.sub.I a third grid line with variable curvature of a driving area region [0270] distance to 14 [0271] distance from tool device to output spindle in the direction of 5 [0272] k1 key width, spacing of parallel driving surface areas [0273] k2 first outside diameter of the attachment device [0274] K3 second outer diameter of the attachment device [0275] k4 reference diameter [0276] K5 rounding region [0277] k6 first radius of curvature [0278] K7 second rounding radius [0279] K8 third radius of curvature [0280] k9 fourth radius of curvature [0281] k10 diameter of the recess [0282] k11 deep attachment device [0283] k12 polygon angle [0284] k13 inclination angle