Abstract
The invention relates to a machine tool, in particular a hand held machine tool, which has a tool-accommodating device which can be moved, in particular in oscillating fashion, about a drive axis, in order to retain a tool device on the machine tool. The tool-accommodating device has at least one clamping device, at least one retaining device and at least one locking device. The retaining device can be moved from at least one first, open position into at least one second, closed position. It is also the case that the retaining device can be forced by a clamping force, by way of the clamping device, preferably in the closing direction from said first, open position in the direction of said second, closed position. The locking device can be moved between at least one first, locking position and at least one second, unlocking position. It is possible here for said locking device to block movement of the retaining device in at least one locking position. A force applied to the locking device directly or indirectly by the tool device moves said locking device from one of said locking positions into one of said unlocking positions. This allows the tool device to be inserted particularly quickly and straightforwardly into the machine tool.
Claims
1. A machine tool, which has a tool receiving device moving around a driving axis, wherein the tool receiving device is adapted to hold a tool device on the machine tool such that the driving axis and a tool axis of rotation are substantially coincident, wherein the tool receiving device has at least one clamping device, at least one holding device and at least one locking device, wherein the holding device can be moved from a first open position into a second closed position, wherein a clamping force can be applied onto the holding device by the clamping device, wherein when the holding device is in the second closed position the holding device extends at least partly into or through the tool device, wherein the locking device can be moved between a first locking position and a second unlocking position, wherein the locking device is adapted to cooperate with the holding device, wherein a movement of the holding device can be blocked in the first open position by the locking device when the locking device is in the first locking position, and wherein the locking device is designed such that the locking device can be moved from the first locking position into the second unlocking position by a force, which has been applied by the tool device on the holding device, which acts on the locking device.
2. The machine tool according to claim 1, wherein the clamping device has at least one spring device and that the spring device is selected from a group of devices comprising at least: a gas or oil pressure spring device, a sheet or diaphragm spring device, a spiral spring device, a coil spring, a torsion spring, a torsion bar spring, an elastomeric spring device, a magnetic and electromagnetic spring device, and a combination of several of the devices.
3. The machine tool according to claim 1, wherein the holding device is rotatably mounted in at least one direction of rotation and/or that at least in one direction the holding device is translatory mounted.
4. The machine tool according to claim 1, wherein the machine tool comprises two of the holding devices.
5. The machine tool according to claim 4, wherein each of the two holding devices are movable in substantially opposite directions.
6. The machine tool according to claim 1, wherein a locking force action can be applied from the locking device on the clamping device in the locking position, a unlocking force action can be applied from the tool device on the locking device, and the unlocking force action is opposite to the locking force action.
7. The machine tool according to claim 6, wherein the locking device comprises a first locking surface section and a second locking surface section, the first locking surface section contacts directly or indirectly the second locking surface section, and at least one component of the clamping force is directed substantially parallel to at least a normal to the first locking surface section or to the second locking surface section.
8. The machine tool according to claim 7, wherein the first locking surface section is mounted in regard to the second locking surface section in the locking position and is mounted with sliding bearings.
9. The machine tool according to claim 1, wherein the clamping device comprises a moving element, the moving element can be moved along a first direction of movement, the locking device has a contact surface, and the contact surface is adapted to be contacted by the moving element.
10. The machine tool according to claim 9, wherein when the locking device is substantially in the first locking position, a normal to the contact surface in a contact point with the moving element includes an angle 1 with the first direction of movement of the moving element, and the angle 1 is larger than 80 degrees and smaller than or equal to 315 degrees.
11. The machine tool according to claim 9, when the locking device is substantially in the second unlocking position, a normal to the contact surface in a contact point with the moving element includes an angle 2 with the first direction of movement of the moving element, and the angle 2 is smaller than or equal to 180 degrees and larger than 95 degrees.
12. The machine tool according to claim 1, wherein a connection device of the machine tool comprises a torque transmission section, the torque transmission section comprises at least two output area region each having a plurality of surface points for transmitting a driving force to the tool device, wherein the torque transmission section is spaced apart to the driving axis, tangent planes on the surface points are inclined in regard to an axial plane, which includes the driving axis, and these tangent planes are inclined in regard to a radial plane, which extends perpendicular to the driving axis.
13. The machine tool according to claim 12, wherein at least one of the at least two output area regions are at least in sections substantially planar.
14. The machine tool according to claim 13, wherein at least one of the at least two output area regions are at least partially curved.
15. The machine tool according to claim 12, wherein the torque transmission area has at least one first upper boundary plane and at least one second lower boundary plane, the at least one first upper boundary plane and the at least one second lower boundary plane are substantially perpendicular to the driving axis, the at least one first upper boundary plane and the at least one second lower boundary plane are spaced apart from each other, and each of the at least two output area regions is disposed between one of the at least one first upper boundary plane and one of the at least one second lower boundary plane.
16. The machine tool according to claim 15, wherein a plurality of the at least two output area regions extend between one single first upper boundary plane and one single second lower boundary plane.
17. The machine tool according to claim 12, wherein the torque transmission region has a plurality of output area regions which are arranged rotationally symmetrical around the driving axis.
18. The machine tool according to claim 12, wherein at least two of the at least two output area regions are arranged symmetrically to a plane of symmetry, the driving axis is located in the plane of symmetry, and the output area regions are arranged substantially contiguously.
19. The machine tool according to claim 12, wherein the torque transmission region comprises a side wall, the side wall extends spaced radially from the driving axis, and the side wall comprises the at least two output area regions.
20. The machine tool according to claim 19, wherein the side wall extends substantially radially closed around the driving axis.
21. The machine tool according to claim 12, wherein a normal to one of the tangent planes is oriented in the radial direction away from the driving axis.
22. The machine tool according to claim 12, wherein a normal to one of the tangent planes is oriented in the radial direction towards the driving axis.
23. The machine tool according to claim 12, wherein the angle is enclosed between one of the tangent planes and the radial plane, wherein the radial plane is arranged vertically to the driving axis, the angle is smaller than 90 degrees, and the angle is larger than 0 degree.
24. The machine tool according to claim 12, angle is enclosed between one of the tangent planes and the axial plane, wherein the driving axis is located in the axial plane, the angle is smaller than 90 degrees, and the angle larger than 0 degree.
25. The machine tool according to claim 12, wherein the torque transmission region has an even number of output area regions.
26. The machine tool according to claim 12, wherein the at least two output area regions are arranged in a star-shaped manner.
27. The machine tool according to claim 1, wherein the machine tool has an encoding section, the encoding section comprises at least a first cross-sectional area, and the encoding section has a first dimension essentially in a direction perpendicular to the cross-sectional area.
28. The machine tool according to claim 27, wherein the encoding sections is arranged rotationally symmetrically with respect to the driving axis.
29. The machine tool according to claim 27, wherein the shape of a base area of the encoding section is selected from a group of shapes comprising at least: a polygon having a plurality of corners, a circle, and an ellipse.
30. A machine tool system with a machine tool according to claim 1 and at least a tool device for use with the machine tool, wherein the holding device comprises at least an effective area for transmitting a force action on the tool device, and wherein it is limited by a holding device boundary surface in the direction of the driving axis on the far side from the machine tool, wherein the tool device comprises a tool attachment region and a tool axis of rotation, wherein the tool attachment region has at least one side wall and extends in the axial direction between a first orthogonal plane and a second orthogonal plane, wherein the first and second orthogonal planes are arranged perpendicular to the tool axis of rotation, wherein the side wall is spaced apart radially from the tool axis of rotation and has an axial dimension in the direction of the tool axis of rotation, wherein the holding device on the tool device exerts a force action in a region of the effective area, and the force action has at least one component in the direction of the tool axis of rotation.
31. The machine tool system according to claim 30, wherein the holding device boundary surface and the effective area of the holding device are arranged between the first and second orthogonal planes of the tool attachment region, when the tool device is mounted on the machine tool.
32. The machine tool system according to claim 30, wherein the side wall of the tool device comprises tool driving area regions and extends in the radial direction at least in a section between a first radial distance and a second radial distance from said tool axis of rotation, and at least one of the tool driving area regions is configured to transmit the torque from the machine tool onto the tool device.
33. A machine tool, which has a tool receiving device moving around a driving axis, wherein the tool receiving device is adapted to hold a tool device on the machine tool such that the driving axis and a tool axis of rotation are substantially coincident, wherein the tool receiving device has at least one clamping device, at least one holding device and at least one locking device, wherein the holding device can be moved from a first open position into a second closed position, wherein a clamping force can be applied onto the holding device by the clamping device, wherein when the holding device is in the second closed position the holding device extends at least partly into or through the tool device, wherein the locking device can be moved between a first locking position and a second unlocking position, wherein the locking device is adapted to cooperate with the holding device, wherein a movement of the holding device can be blocked in the first open position by the locking device when the locking device is in the first locking position, and wherein the locking device is designed such that the locking device can be moved from the first locking position into the second unlocking position by a force, which has been applied, by the tool device, on the locking device via the holding device.
Description
(1) FIG. 1 shows a partial schematic illustration of a tool receiving device of a hand guided machine tool.
(2) FIG. 2 shows two sectional views of the tool receiving device: FIG. 2A shows the closed position and FIG. 2B shows the open position.
(3) FIG. 3 shows two further sectional illustrations of an embodiment of the tool receiving device: FIG. 3A shows the closed position and FIG. 3B shows the open position.
(4) FIG. 4 shows two sectional views of a further embodiment of the tool receiving device, where FIG. 4A shows the open position and FIG. 4B shows the closed position.
(5) FIG. 4C shows a detailed view of the locking device.
(6) FIG. 5 shows two schematic representations of the tool receiving device: FIG. 5A shows the open position and FIG. 5B shows the closed position.
(7) FIG. 6 shows a torque transmission area with two output surface areas FIG. 6A shows a front view and FIG. 6B shows the closed position.
(8) FIG. 7 shows a torque transmission region with output area regions, which extend between boundary planes.
(9) FIG. 8 shows a torque transmission region with two output area regions, which are arranged abutting each other: FIG. 8A shows a plan view and FIG. 8B shows a front view.
(10) FIG. 9 shows a torque transmission region and the inclination of essentially the output area regions (tangent plane) by the angle : FIG. 9A shows a plan view and FIG. 9B shows a front view.
(11) 10 shows a torque transmission area and the inclination of essentially the output area regions (tangent plane) by the angle .
(12) FIG. 11 shows a torque transmission region with a star-shaped arrangement of the output surface areas around the drive shaft.
(13) FIG. 12A shows a plan view of an embodiment of a torque transmission region with a star-shaped arrangement of the output area regions.
(14) FIG. 12B shows a side view of an embodiment of a torque transmission region with a star-shaped arrangment of the output area regions.
(15) FIG. 13 shows two sectional views of torque transmission regions with different embodiments of the encoding devices, where FIG. 13A is one embodiment and FIG. 13B is another embodiment.
(16) FIG. 14 shows a partial sectional view of an embodiment of a machine tool system.
(17) FIG. 15 shows a plan view of a portion of an embodiment of the tool device with a tool side wall.
(18) FIG. 16 shows perspective views of several contact regions: FIG. 16A shows a point-shaped contact region; FIG. 16B shows a line-shaped contact region; and FIG. 16C shows an area-shaped contact region between the output area region of the torque transmission region and the tool driving area region.
(19) FIG. 17 shows perspective views of sections of differently curved output area regions: FIG. 17A shows a unidirectionally curved section of an output area region; FIG. 17B shows a bidirectional curved section of an output area region; and FIG. 17C shows a bidirectional curved section of an output area region.
(20) FIG. 18 shows a side view of a machine tool with a tool device.
(21) The FIG. 1 shows a schematic illustration of a tool receiving device 1 for a hand guided machine tool. By this tool receiving device 1, a tool device 8 can be received on the machine tool. Here, a tool axis of rotation and a driving axis 2 of the machine tool are substantially coincident. The tool holder device 1 is designed such that it is actuated by a locking device 5 on the receiving of the tool device 8. The locking device 5 is intended to hold a holding device 4 in an opened position. This holding device 4 is loaded in the open position by means of a clamping device 3 in the direction of a closed position. In the closed position, the tool device 8 is received on the machine tool and it is held by the holding device 4 thereto. If the tool device 8 is removed from the tool receiving device 1, the locking device 5 holds the holding device 4 again in the open position and releases it again only in the direction of the closed position, when the locking device 5 is operated by means of the tool device 8. By such a tool receiving device 1, both a tool-free changing of the tool device 8 can be achieved, as it is common in hand guided machine tools, as well as, on the other hand, this tool change can be particularly easy achieved.
(22) The FIG. 2 shows two sectional views of the tool receiving device 1 (FIG. 2a closed position, FIG. 2b open position). Here, the closed position 1, FIG. 2a, of the tool receiving device means that the holding device 4 is closed and the tool device 8 is accommodated on the tool receiving device. The open position, FIG. 2b, means that the holding means 4 is opened and that the tool device 8 can be inserted into the tool receiving device or that it can be removed therefrom. The tool receiving device 1 has a clamping device 3, a holding device 4 and locking device 5. The holding device 4 has two hook devices 4a and 4b which can be moved in the opposite direction. The hook devices 4a/4b are rotatably mounted around a common pivot point 4d in the tool receiving device. For holding the tool unit 8, the hook devices 4a/4b each comprises holding surfaces 4c. The locking device 5 has a slot-like guide recess 5e, wherein the locking device 5 is formed integrally with the first hook device 4a. A moving element 6 engages into the guide recess 5e and connects the hooks device 4a/4b with the clamping device 3 by means of the locking device 5. Due to the clamping device, the holding device 4 is held in the closed position. In the open position, FIG. 2b, the moving element 6 is supported in the guide recess 5e. On the inserting of the tool device 8 in the tool receiving device 1, the tool device contacts the hook device 4a/4b in the region of the actuating regions 4e/4f. By contacting the tool device 8 with the hook device 4a/4b, a torque is applied on these devices in the direction of the closed position, and for an appropriate size of the torque, the closing of the tool receiving device is initiated. By the two hook devices 4a/4b, which can be moved in the opposite direction, and the moving element 6, which can be moved in the guide recess 5e, a particularly simple and secure tool receiving device with few components can be obtained.
(23) The FIG. 3 shows two detailed cross-sectional views of a section of the tool receiving device 1 shown in the FIG. 2, in a closed position (FIG. 3a) and in an open position (FIG. 3b). The moving element 6 moves due to the force action applied by the clamping device 3 in its movement direction 6a. The guide groove 5e is so designed that an angle .sub.2 is included by a normal to the contact surface 7a, the guide recess 5e with the moving element 6, in the closed position (FIG. 3a), with the movement direction 6a. In the open position (FIG. 3b), an angle .sub.1 is included by the normal on the contact surface 7a, the guide recess 5e with the moving member 6, with the movement direction 6a. The angle .sub.2 is chosen so that it is close to 110 degrees (preferably in a range of 108 degrees to 112 degrees). Thus leads to force amplification with respect to the hook devices 4a/4 b, wherein the force amplification leads to a larger holding force of the holding device 4. The angle .sub.1 is chosen such that it essentially corresponds to 180 degrees. Thus, the hook devices 4a/4b are held in the open position. From this open position (FIG. 3b), the holding device is only moved, when a torque on the hook devices 4a/4b via the actuating region 4e/4f is exerted by the tool device 8. The size of the angles .sub.1 and .sub.2 can, for a given movement direction of the moving element 6, be determined by the course of the guide recess 5e. By the shown choice of the angles .sub.1 and .sub.2, on the one hand, a secure retaining of the hook devices 4a/4b in the open position can be achieved, and on the other hand, a very high holding force can be achieved, which these hook devices 4a/4b exert on the tool device 8, and thus is a particularly reliable tool receiving device can be achieved.
(24) The FIG. 4 shows a tool receiving device 1 in an open position and in a closed position, as well as a detailed view of the locking device. The tool receiving device 1 comprises a simple locking device 5, a clamping device 3 and a holding device 4. Here, the FIG. 4a shows the tool receiving device 1 in an open position, the FIG. 4b shows the tool receiving device 1 in a closed position, and the FIG. 4c shows a detailed view of a locking device with an indirect contacting with the locking surface section 5a/5b. The holding device 4 is acted upon by the clamping device 3 with the clamping force 3a and pulled toward the closed position. In the open position (FIG. 4a), the first blocking surface section 5a contacts the second locking surface section 5b. A locking force potential 5d results due to the clamping force 3a in conjunction with an effective coefficient of friction between these two sections 5a/5b. By means of the tool device 8, a force action against locking force potential 5d can be applied on the holding device. Only when the force action coming from the tool device 8 is greater than the locking force potential 5d, the holding device is moved toward the closed position (FIG. 4b). In the closed position (FIG. 4b), the tool device 8 is thereby held by the holding device 4 in the tool receiving device 1, that the clamping force 3a is transmitted to the holding surface 4c on the tool device 8. The FIG. 4c shows a locking device 5, in which the first locking surface section 5a and the second locking surface section 5b contact each other by means of an intermediate element 5c. For transferring the tool receiving device 1 from the open position, in which it is shown in the FIG. 4c, to the closed position a force action is applied by the tool device 8 in the actuating region 4a. When a threshold is exceeded, the holding device is moved toward the closed position (not shown).
(25) The FIG. 5 shows two schematic representations of a tool receiving device in the closed position (FIG. 5b) and in the open position (FIG. 5a). The tool receiving device 1 comprises a clamping device 3, a holding device 4 and locking device 5. The locking device 5 has a first lever member 10, a second lever member 11 and a connection element 12. In this case, the first lever member 10 is in contact with the second lever member 11 by means of the connection element 12. The first lever member 10 is acted upon with a clamping force by means of the clamping device 3 in the closed position and it is rotatably mounted around a pivot point d1. The second lever member 11 is rotatably mounted around a second pivot point d2. In the open position (FIG. 5a), the first lever member 10 exerts a force action F1 to the second lever element 11 via the connection element 12. This force action is spaced by the distance a1 from the pivot point d2 and thus causes a torque T1 to the second lever member 11. When a tool (not shown) is inserted into the tool receiving device 1, a force action F2 by the tool device (not shown) is caused directly or indirectly to the second lever element 11. The force action F2 is spaced by the distance a2 from the pivot point d2 and causes a torque T2 on the second lever member 11. When the torque T2 exceeds the torque T1, then the second lever member 11 is moved in the direction of the torque T2, the tool receiving device closes. In the closed position (FIG. 5b), the first lever member 10 exerts a force action F3 on the second lever member 11 by means of the connection element 12. The force action F3 is spaced by the distance a3 from the pivot point d2 and causes a torque T3. In this closed position, the tool device (not shown) can be held in the tool receiving device by means of a holding device 4 (not shown). By the described configuration of the lever elements 10/11 and their connection to the connection element 12, the tool device can be held with a so-called over-center position, such mechanisms have been found to be especially safe, so that an improved tool receiving device 1 can be achieved.
(26) The FIG. 6 shows two views of a torque transmission region 9 of a tool receiving device (FIG. 6a front view, FIG. 6b top view). This torque transmission region 9 has two output area regions 9a which each have a plurality of surface points 9b. The torque transmission portion 9 is adapted to transfer the driving forces of the machine tool (not shown) onto a tool device (not shown). The machine tool drives the tool device in a rotating-oscillating manner, thereby the tool device oscillates around the driving axis 2.
(27) The FIG. 7 shows a torque transmission region 9 of a machine tool, it is adapted to transmit the driving forces from the machine tool (not shown) onto the tool device (not shown). The torque transmission region 9 has two output area regions 9a. Each output area regions 9a has a plurality of surface points 9b. The area regions 9a each extend between an upper boundary plane 13 and a lower boundary plane 14, the upper boundary planes coincide in a boundary plane 13. The boundary planes 13/14 are arranged perpendicular to the driving axis 2. By means of the machine tool (not shown), the tool device (not shown) is rotationally driven to oscillate around the driving axis 2.
(28) The FIG. 8 shows two views of a torque transmission region 9 of a machine tool (FIG. 8a plan view, FIG. 8b front view). The torque transmission region 9 is provided to transfer the driving forces from a machine tool (not shown) onto a tool device (not shown), the tool device is driven rotationally oscillating around the driving axis 2. Each two output area regions 9a are positioned abutting one another, and several of these output area regions 9a are arranged rotationally symmetrical around the driving axis 2. The output area regions 9a extend between a single upper boundary plane 13 and a single lower boundary plane 14. Each two output area regions 9a are connected to two further output area regions 9a by means of a connection region 9c. By the abutting arrangement of the output area regions 9a, these can support each other, and a particularly stable torque transmission region 9 can be achieved. Due to the rotationally symmetric arrangement of the output surface areas 9a, it is possible to offset the tool device in discrete steps around the driving axis, thus a more flexible use of the machine tool (not shown) is provided.
(29) The FIG. 9 shows two views of a section of a torque transmission region 9 of the machine tool shown (FIG. 9a plan view, FIG. 9b front view). An axial plane 15 includes the driving axis 2. A tangent plane 17 is tangent to the output area region 9a in a surface point 9b. The tangential plane 17 includes the acute angle with the axial plane 15.
(30) The FIG. 10 shows a sectional view of a torque transmission region 9 of a machine tool. The torque transmission region 9 has a plurality of output area regions 9a. A tangent plane 17 is tangent to one of these output area regions 9a in a surface point 9b. A radial plane 16 is arranged orthogonal to the driving axis 2. The radial plane 16 includes an acute angle with the tangent plane 17.
(31) The FIG. 11 shows a tool receiving device 1 in three-dimensional illustration. The torque transmission region 9 has a plurality of output area regions 9a. The output area regions are rotationally symmetrically arranged in a star-shaped manner around the driving axis 2. A tool device (not shown) can be held on the machine tool by the hook devices 4a/4b. The output area regions 9a are positioned so that a normal 18 to one of these output area regions 9a has its direction to the driving axis of rotation 2. It follows that the torque transmission region 9 is designed essentially as a recess with a star-shaped profile. The output area regions 9a are arranged contiguously and extend closed around the driving axis of rotation 2. By this arrangement, a particularly stable torque transmission region 9 can be achieved, which allows a uniform introduction of the driving forces from the machine tool (not shown) onto the tool device (not shown).
(32) The FIG. 12 shows a torque transmission region 9 of a tool receiving device of a hand guided machine tool, wherein in the FIG. 12a a plan view of the tool receiving device is shown, and wherein in the FIG. 12b a front view of the tool receiving device is shown. A tool device (not shown) can be held at a torque transmission region 9 by means of the hook devices 4a/4b. For this purpose, the hook devices 4a/4b can be moved in opposite directions and can be actuated by the tool device. The torque transmission region 9 has a plurality of output area regions 9a, which are star-shaped and arranged radially circumferentially closed around the driving axis 2. A normal 18 to one of these output area regions 9a is oriented away from the driving axis 2. By such an arrangement of the output area regions 9a, a particularly simple tool receiving device can be achieved.
(33) The FIG. 13 shows two partial sectional views of the torque transmission regions 9 of a tool receiving device of a hand guided machine tool. In this case, different encoding devices 19 are shown in the FIG. 13. The FIG. 3a shows a torque transmission region 9 with a variety of output area regions 9a. The output area regions 9a are arranged in a star-shaped manner around the driving axis 2, and they are radially spaced therefrom. In the region of the driving axis 2, an encoding device 19a is arranged as a raised section, while this encoding device 19a is adapted to engage into a recess in the tool device (not shown). The encoding device 19a is arranged circular and rotationally symmetrical to the driving axis 2. The FIG. 13b shows a torque transmission region 9 with a variety of output area regions 9a. The output area regions 9a are arranged in a star-shaped manner around the driving axis 2, and they are radially spaced therefrom. In the region of the driving axis 2, an encoding device 19b is arranged as a recess, while this encoding device 19b is adapted that a raised portion of a tool device (not shown) engages into it.
(34) The FIG. 14 shows a machine tool system comprising a tool receiving device 1 and a tool device 8. The tool device 8 is received on the tool receiving device 1 in such a way that the driving axis of rotation 2 and the tool device axis of rotation 8b coincide. The tool tool 8 comprises a tool attachment region 8a, this extends between a first orthogonal plane 8c and a second orthogonal plane 8d. The tool driving area region 8f is disposed between the first orthogonal plane 8c and the second orthogonal plane 8d. The first orthogonal plane 8c limits the tool attachment region 8a on the machine tool side facing in the direction of the tool axis of rotation 8b, the second orthogonal plane 8d limits the tool attachment region 8a on the side facing away from the machine tool side. The tool driving area region 8f is provided for the transmitting of the driving forces from the machine tool onto the tool device 8. For this purpose, the tool driving area region 8f has at least in sections the negative form of the output area region 9a, and allows therefore a form fit connection between the tool device 8 and the tool receiving device 1. The tool device 8 has a tool encoding device 8e, through which the first hook device 4a and the second hook device 4b of the holding device 4 grip. The hook devices 4a/4b exert a holding force effect 4h in the region of the actuating surface 4c on the tool device 8. The tool device 8 is held on the machine tool by the holding force effects 4h. By the double inclination around the angle and angle (not shown) of the output area regions 9a of the torque transmission region 9, the tool device 8 is held free from backlash in the tool receiving device 1. The holding force effects 4h are indirectly applied by the clamping device 3. The hook devices 4a/4b of the holding device 4 are mounted rotatably around the hook pivot point 4d. The clamping device 3 contacts the holding device 4 by the moving element 6. By the described configuration of the guide recess 5e, the sum of the holding force effects 4h is amplified in regard to the clamping force 3a, and a particularly secure holding of the tool device 8 in the tool receiving device 1 can be achieved.
(35) The FIG. 15 shows the path of the tool side wall 8i, which has the tool driving area region 8f. The tool driving area region 8f are arranged in a star-shaped manner around the tool axis of rotation 8b, and they are partly conjugated to the output area regions of the torque transmission region (not shown). The tool side wall 8i runs in the region of the tool driving area regions 8f between a first distance r1 and second distance r2 to the tool axis of rotation 8b. The tool driving area regions 8f have turn tool surface points 8h. Due the course of the tool driving area regions 8f, which are adapted to the output area regions of the torque transmission region (not shown), a form fit transmission of the driving forces from the machine tool onto the tool device 8 has been enabled, thus, very large driving forces can be securely transmitted.
(36) The FIG. 16 shows various contact regions 20a, 20b, 20c between the tool driving area regions 8f and the output area regions 9a of the torque transmission region 9. Here, the form and nature of these contact regions 20a, 20b, 20c depend on the shape of the two output area regions 8f/9a and their interaction. The FIG. 16a shows a point shaped contact area 20a. In this case, the contact region 20a has a circular extension or an elliptical extension. A point shaped contact area 20a is particularly insensitive to an inaccurate positioning of the tool device in regard to the machine tool, as this can be caused by tolerances in the manufacture of the tool device. The FIG. 16b shows the line shaped contact region 20b. In this case, the contact region 20b has along the contact line 21 a large extension and transverse to it a small extension. Compared to a point shaped contact region 20a, a line shaped contact region 20b has a larger contact area and it can transfer larger driving forces of the machine tool onto the tool device. The FIG. 16c shows an area shaped contact region 20c. In this case, the area shaped contact region 20c has a larger contact area compared to the line shaped contact region 20b, and it can therefore transfer larger driving forces from the machine tool to the tool device. Compared to the point shaped contact region 20a, the line shaped contact region 20b and the area shaped contact region 20c require a higher accuracy, both in the production of the output area region 8f/driving area region 9a as well as the positioning of the tool device on the machine tool. The output area region 9a and the tool drive area region 8f can thus be coordinated, that an area shaped contact (FIG. 11c) or line shaped contact (FIG. 11b) is set upon the transmission of appreciable driving forces, for example during the operation of the machine tool with rated power.
(37) The FIG. 17 shows different sections of an output area region 9a. Not shown is an area shaped output surface region, which is also possible. The FIG. 17a shows a unidirectionally curved section of an output area region 9a. This section of the output area region 9a can be described by means of straight lines a and curved grid lines b.sub.I. The curved grid lines b.sub.I have a constant radius of curvature R.sub.I. Such an output area region 9a corresponds in sections to a cylinder jacket surface. As far as several different radii of the 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 has be chosen such that the driven surface portion 9a change in sections to a plane or to the counter surface (not shown) in the transmission of driving forces, or that the tool driving area region 8f adjusts in the transmission of driving forces, cooperating with these for transmitting the driving forces. The FIG. 17b shows a section of one output area region 9a with a bidirectional curvature. This section of the output surface area 9a can be described by curved grid lines b.sub.I and by curved grid lines b.sub.II. The curved grid lines b.sub.I have a constant radius of curvature R.sub.I and the grid lines b.sub.II have a constant radius of curvature R.sub.II. Such an output area 9a corresponds, for the special case that the first radius R.sub.I and the second radius R.sub.II of curvature are the same size, to a spherical surface. The FIG. 17b shows an output area 9a with different radii of curvature R.sub.I and R.sub.II. In this case, the size of the radii of curvature R.sub.I and R.sub.II are such that the output area region 9a is at least partially changed during the transmission of the driving forces to a plane or to the tool driving area region 8f (not shown) with which it adapts cooperating for transmitting the driving forces. The FIG. 17c shows a section of one output area region 9a with a bidirectional curvature. This section of the output area region 9a can be described by the grid lines b.sub.I with a constant radius of curvature R.sub.I and by the grid lines with a variable radius of curvature R.sub.Ia. In such an output area region 9a, also all grid lines can have a variable radius of curvature (not shown). The size of the radii of curvature R.sub.I and R.sub.II can be selected so that the output area region 9a can be altered during the transmission of the driving forces in sections to a plane or to the tool drive area 8f (not shown) with which it adapts to cooperate with these for transmitting the driving forces. In the FIG. 17, the curved output area region 9a is shown as concave. The considerations expressed can be transferred to convex curved input/output area regions, correspondingly. Advantageously, a concave-convex pairing of the driving area region 8f/output area region 9a is chosen, because so large driving forces can be transmitted, or a mating convex-convex is chosen, because so a simple positioning of the tool device is made possible.
(38) The FIG. 18 shows a tool device 8, which is received in a machine tool 22. The tool device 8 has a tool attachment region 8a, by which it is connected to the machine tool 22. The machine tool 22 has an output spindle 22a, which guides the driving forces to the tool device 8, and in particular a tool attachment region 8a. The output drive spindle 22a moves around the drive shaft 2, in particular rotationally oscillating, thereby also the tool device 8 is set in a similar motion. The tool device 8 has an operating region 8j, which is set up to act on a work piece or work piece arrangement (not shown). The driving forces of the machine tool 22 is transferred from the tool attachment region 8a on the operating region 8j using the tool connection region 8k. The machine tool 22 has an operating lever 22b, which is adapted to permit a change of the tool device 8.
LIST OF REFERENCE SIGNS
(39) 1 tool receiving device of a hand guided machine tool 2 driving axis 3 clamping device 3a clamping force 4 holding device 4a first hook device 4b second hook device 4c holding surface 4d hook pivot point 4e actuating surface of 4a 4f actuating surface of 4b 4g holding device boundary surface 4h holding force effect 5 locking device 5a first locking surface section 5b second locking surface section 5c intermediate element 5d locking force potential 5e guide recess 6 moving element 6a current movement direction of 6 7 contact surface 7a normal to the contact surface 8 tool device 8a tool attachment region 8b tool axis of rotation 8c first orthogonal plane 8d second orthogonal plane 8e tool encoding device 8f tool driving area region 8g axial extension of the tool driving area region 8h tool surface point 8i tool side wall 8j operating region 8k tool connection region 9 torque transmission region 9a output area region 9b surface point 9c connection region 9d fastening screw 9e washer 9f nut member 9g tie bar device 10 first lever member 11 second lever member 12 connection element 13 upper boundary plane 14 lower boundary plane 15 axial plane 16 radial plane 17 tangent plane 18 normal to an output area region 19 coding device 19a raised encoding device 19b encoding device with recess 20a point shaped contact region 20b line shaped contact region 20c area shaped contact region 21c contact line 22 machine tool 22a output spindle 22b operating lever .sub.1 angle .sub.2 angle T1 first torque on the second lever member T2 second torque on the second lever member T3 third torque on the second lever member d1 pivot point of the first lever member d2 pivot point of the second lever member F1 first force action on the second lever member F2 second force action on the second lever member F3 third force on the second lever member a1 distance between d2 and F1 a2 distance between d2 and F2 a3 distance between d2 and F3 r_1 first distance of the tool side wall to the tool axis of rotation r_2 second distance of the tool side wall to the tool axis of rotation R.sub.I first radius of curvature of an output area region R.sub.Ia variable radius of curvature of a output area region R.sub.II second radius of curvature of an output area region a straight extending grid line of an output surface area b.sub.I first curved grid line of an output area region b.sub.II second curved grid line of an output area region b.sub.Ia third grid line with variable a curvature of an output area region angle angle
