Swivel device with integrated override function for + 47° and - 1°

Abstract

Electric processing machine, in particular a hand-held circular saw, with a pivoting part (11) carrying a tool, in particular a circular saw blade, and a base part (13), relative to which the pivoting part (11) can be pivoted for carrying out bevel machining, in particular for making bevel cuts, in particular about a virtual pivot axis, wherein the pivoting part (11) and the base part (13) are coupled to one another by a pivoting guide (15, 17) which defines a basic pivoting path for the pivoting part (11) between a first basic position and a second basic position, in particular comprising 45°, wherein the pivoting guide (15, 17) provides at least one override function for at least one basic position, which enables pivoting of the pivoting part (11) beyond the basic position into at least one override position, and wherein the override function can be activated by actuating the pivoting guide (15, 17), characterized by that at least one overtravel function is provided by the pivot guide (15, 17) for each of the two basic positions, the overtravel functions being divided into two sections (15, 17) of the pivot guide spaced apart along a pivot axis.

Description

[0001] The invention relates to an electrical processing machine, in particular a hand-held circular saw, with a pivoting part carrying a tool, in particular a circular saw blade, and a base part, relative to which the pivoting part can be pivoted, in particular about a virtual pivot axis, for carrying out bevel machining operations, in particular for making bevel cuts.

[0002] Such processing machines are generally known.

[0003] Particularly with hand-held circular saws, it is desirable for certain applications to be able to pivot the saw blade slightly beyond one or more given normal basic positions. This is the case, for example, when panels are sawn to size that are then to be joined together. In order to achieve the narrowest possible visual gap between the panels, it is known in such cases not to cut the panels at 0°, i.e. with the sawblade perpendicular to the plane of the panel, but to perform a so-called undercut, in which the saw is made at an angle of approximately -1°, always starting from the back of the panel. If a hand-held circular saw has such a pivoting option beyond the basic position of 0° into an undercut position of, for example, -1°, then a tear-free undercut can advantageously be created on the underside of the panels.When panels cut in this way come together, a visually perfectly narrow gap is created on the side of the panel that was previously on the underside during sawing and then forms the visible side in the installation situation.

[0004] Such sawing in "overtravel positions" is also useful with respect to a home position in which the saw blade assumes a tilt angle other than 0°, in particular an oblique angle of 45° to a base plane of the machine's base. In such cases, it is desirable, for example, to perform cuts in an overtravel position with an inclination angle of 47°.

[0005] While such pivoting options are generally known in connection with hand-held circular saws, the problem is that such pivoting arrangements are relatively complex in design and therefore associated with comparatively high manufacturing costs for the machine. Furthermore, operating such pivoting arrangements is relatively laborious and complicated for the user.

[0006] US 2011 / 0041 666 A1 discloses a radial arm saw equipped with a positioning mechanism for performing bevel cuts, allowing the saw blade to be positioned at 45° and 46°.

[0007] US Pat. No. 5,433,008 A discloses a pendulum-type saw whose saw blade can be adjusted to an inclined position. By rotating a collar, overtravel positions of 3° can be achieved.

[0008] JP 2005-271 324 A discloses a hand-held circular saw in which the swivel position can be finely adjusted to both 0° and 45° using knurled screws.

[0009] WO 00 / 51 772 A1 discloses a saw in which a rotary knob allows the saw blade to be adjusted beyond 90°.

[0010] The object of the invention is therefore to improve a processing machine of the type mentioned at the outset in such a way that it is possible to work in one or more “overtravel positions”, whereby this should be possible with an arrangement which is comparatively simply constructed and inexpensive to manufacture, which should also be quick and easy to operate and function reliably over the long term.

[0011] This problem is solved by the features of independent claims 1 and 3.

[0012] According to the invention, the pivoting part and the base part are coupled to one another by a pivoting guide which defines a basic pivoting path - in particular comprising 45° - for the pivoting part between a first basic position and a second basic position, wherein the pivoting guide provides at least one override function for at least one basic position, which enables the pivoting part to be pivoted beyond the basic position into at least one override position, and wherein the override function can be activated by actuating the pivoting guide.

[0013] According to the invention, the pivot guide combines several functions. Firstly, the pivot guide provides the actual pivot connection between the pivot part carrying the tool and the base part, which is in particular a base plate with which the machine can be placed on a guide rail, although this is not mandatory. Secondly, according to the invention, it is the pivot guide itself that can be actuated in such a way that pivoting beyond the relevant basic position is possible, thus enabling work to be carried out in an overtravel position of the tool. Additional devices for implementing an overtravel function are therefore no longer required. Furthermore, the pivot guide is extremely easy to operate for the user.

[0014] Advantageous embodiments are also specified in the dependent claims, the description and the drawing.

[0015] According to one aspect of the invention, the pivot guide provides at least one overtravel function for each of the two basic positions, wherein the overtravel functions are divided into two sections of the pivot guide spaced apart along a pivot axis.

[0016] This creates, on the one hand, an extremely precise and reliable swivel guide for the swivel part, since the swivel part is guided during the swiveling process on two sections spaced apart along the swivel axis. This division is also used to implement at least one overtravel function according to the invention for each of the two basic positions. The two sections of the swivel guide can thus be constructed comparatively simply and thus robustly, since each section only has to provide one overtravel function, rather than one section having to provide all overtravel functions. This can considerably simplify the manufacture of the swivel guide and thus of the machine as a whole and make it significantly more cost-effective.

[0017] According to a further aspect of the invention, the pivot guide comprises at least one guide part acting between the base part and the pivot part, which guide part is fastened to the base part and on which the pivot part is positively guided, or vice versa, wherein an actuating member for the overrun function is formed on the guide part, and wherein the guide part including the actuating member is provided in the form of a one-piece component, in particular a plastic component.

[0018] To create the pivotable coupling between the pivoting part and the base part, as well as to simultaneously equip this pivoting guide with an overtravel function that can be activated by the user as needed, it is only necessary to manufacture a single plastic component and attach it to the base part. All required functions are thus provided by a single plastic component. This allows for significant cost reductions in machine manufacturing without compromising stability, guidance accuracy, user-friendliness, or longevity. In principle, the guide part can be an integral part of the base part or the pivoting part, although a separate component as the guide part may be preferred for manufacturing and cost-effective reasons.

[0019] The actuating member of the guide part can be designed as a stop member or comprise a stop member, in particular a stop member as explained above.

[0020] In one embodiment, the pivot guide can comprise a stop member movable between a basic position and an overtravel position, wherein at least one basic stop is effective in the basic position to define the basic position, and at least one overtravel stop is effective in the overtravel position to define the overtravel position. The specific design and location of these stops is fundamentally arbitrary and can be located on the pivot guide and / or on the pivot part or base part.

[0021] The manner in which the pivoting part can be pivoted relative to the base part is based on the interaction of stops, which are effective or inactive depending on the position of the movable stop element. In general, any conceivable configuration of stops or stop surfaces can be provided. For example, it is possible to provide two stop surfaces on the movable stop element or actuating element, offset in the pivoting direction, which interact with one and the same stop surface on the pivoting part or base part, with one stop surface of the stop element being effective in the basic position of the stop element, whereas the other stop surface of the stop element, offset in the pivoting direction, is effective when the stop element is moved into the overtravel position.Alternatively, it is possible to provide a single stop surface on the movable stop member, which in the basic state interacts with a first stop surface of the pivoting part or base part and, when moved into the overrun state, reaches a "swivel path" on which the stop surface of the stop member can be moved past the first stop surface of the pivoting part or base part until it interacts with a further stop surface of the pivoting part or base part to determine the overrun position.

[0022] A particularly advantageous further embodiment of the invention is one in which the pivot guide comprises two guide parts of the aforementioned type—in other words, guide parts that each act between the base part and the pivot part, are designed as separate components, and are arranged at a distance from one another along a pivot axis. Due to their axial spacing, both guide parts together ensure particularly precise and stable guidance of the pivoting movement between the base part and the pivot part.

[0023] At the same time, each guide part can provide an overtravel function with respect to different home positions. For example, one guide part can offer the possibility of working in an overtravel position of -1° by actuating the actuator, whereas the other guide part can enable working in an overtravel position with respect to a 45° home position, for example, in an overtravel position of 47°.

[0024] The actuating element can comprise a button that extends along a circular segment, in particular around the pivot axis, in a plane perpendicular to the pivot axis, is integrally formed at one end, and can be deflected in the direction of the pivot axis by applying pressure in the region of the other end, undergoing elastic deformation. In particular, it is provided that the button is undeformed in its basic state, i.e., is not under tension, and automatically returns to its basic state after being deflected into the overtravel state.

[0025] This type of actuator design is particularly advantageous in terms of manufacturing and operation. The concept of deforming the button only for the overtravel position, which is relatively rarely required in practice, protects the button by counteracting material fatigue or "wearing out." This concept thus makes it possible to manufacture a guide part with a one-piece molded button that can be deflected under elastic deformation as a plastic component at extremely low cost, without any risk of functional impairment during prolonged use.

[0026] Furthermore, it can be provided to form at least one stabilizing tab on the pivot part or on the base part, which protrudes in the direction of the pivot axis and runs parallel to the button when assembled, and which prevents at least a movement of the button that exceeds a predetermined amount in a plane running perpendicular to the pivot axis. Such a simple measure can ensure in a particularly effective manner that the button can essentially only execute the movement that is necessary to provide the overtravel function. Movements of the button in other directions, which could lead to the destruction of the button or to functional impairment, e.g. due to material fatigue, are effectively prevented by such a stabilizing tab.

[0027] Alternatively or additionally, it may be provided that means are provided which prevent improper movements of the button with components in the direction of the pivot axis.

[0028] In a further exemplary embodiment, the guide part interacts with the pivoting part or base part via at least two radially spaced guide devices, each extending along a circular segment, in particular around the pivot axis. Each guide device is preferably designed as a groove / rib arrangement. This creates a positive guide between the guide part on the one hand and the pivoting part or base part on the other, which is not only particularly advantageous in terms of manufacturability, but also ensures particularly precise and stable guidance, with the additional advantage that a simple, reliable and easy-to-use actuation for providing an override function can be integrated into such a guide concept. The guide part is preferably designed such that it has the basic shape of a quarter-circle plate.

[0029] The actuating element, in particular a button as described above, can be at least substantially recessed into the guide part. This ensures that the actuating element is not accidentally actuated. Furthermore, improper movements of the actuating element can be prevented or at least made more difficult.

[0030] The invention is described below by way of example with reference to the drawings. Fig. 1 schematically shows the basic principle of the swivel guide according to the invention, Fig. 2 different views of a base part according to an embodiment of the invention, Fig. 3 different views of a pivoting part according to an embodiment of the invention, Fig. 4 different views of a front guide part according to an embodiment of the invention, Fig. 5 the interaction of the front guide part with the base part and the swivel part, Fig. 6 different views of a rear guide part according to an embodiment of the invention, and Fig. 7 the interaction of the rear guide part with the base part and the swivel part.

[0031] Fig. 1 schematically shows an embodiment of a processing machine according to the invention, which comprises a base part 13, which is designed in particular as a base plate and is adapted to be placed on a guide rail, not shown.

[0032] A front guide part 15, which has the basic shape of a quarter-circle plate, is attached to the base part 13. On a plane extending from the front guide part 15 along a plane perpendicular to the plane of the drawing, Fig. A rear guide part (not shown) is attached at a point spaced from the pivot axis 1. In terms of basic structure and function, the rear guide part corresponds to the front guide part 15.

[0033] A pivoting part 11 is arranged between the front guide part 15 and the rear guide part, which, among other things, carries a circular saw blade (not shown). The pivoting part 11 and thus the circular saw blade are positively guided between the two guide parts in such a way that the pivoting part 11 can be pivoted relative to the base part 13 about the pivot axis.

[0034] The forced guidance is achieved by guide ribs 29 formed on the pivoting part 11, each extending along a circular segment around the pivot axis, being guided in corresponding guide grooves 27 of the guide parts.

[0035] The guide parts are designed in such a way that the pivoting part 11 can assume two defined basic positions as well as two defined overtravel positions relative to the base part 13, in which work can be carried out, ie in which cuts can be made on a workpiece (not shown).

[0036] A basic position is one in Fig. 1, in which the saw blade runs perpendicular to a plane defined by the base part 13. In a further basic position, the saw blade is pivoted by 45° relative to this 0° position. This 45° position, in which bevel cuts can be made on the workpiece, is shown in Fig. 1 indicated by a solid line.

[0037] The front guide part 15 is designed to provide the defined 45° position. In addition, the front guide part 15 serves to Fig. 1 to provide an overrun position for the swivel part 11 indicated by a first dash-dotted line, namely a 47° position.

[0038] One in Fig. 1 -1° overrun position indicated by another dotted line is determined by the Fig. 1, a rear guide part not shown is provided, in accordance with the basic principle explained in more detail below, in the same way as the 47° overrun position is made possible by the front guide part 15.

[0039] To provide the defined 45° home position, an actuating member designed as a button 19 is formed integrally on the front guide part 15. In the exemplary embodiment shown schematically here, the button is provided with a stop 33 which is effective both in the 45° home position and in the 47° overtravel position. In the 45° home position, the stop 33 of the button 19 interacts with a basic stop 23 formed on the pivoting part 11. By actuating the button 19, the stop 33 of the button 19 disengages from this basic stop 23 of the pivoting part 11, so that the pivoting part 11 can be moved beyond the 45° home position past the stop 33 of the button 19 until the stop 33 of the button 19 abuts a second stop 21 of the pivoting part 11.This overrun stop 21 is arranged with respect to the base stop 23 in such a way that an overrun path of 2° is possible, so that the overrun stop 21 defines the mentioned 47° overrun position.

[0040] The aforementioned actuation occurs when a user presses the button 19 in the direction of the pivot axis, i.e., presses it in, so that the stop 33 of the button 19 releases the previously blocked path for the base stop 23 of the pivoting part 11, thus enabling further pivoting of the pivoting part 11 up to the 47° overtravel position. Alternatively, it can be provided that the actuation occurs by pulling the button 19 out in the direction of the pivot axis.

[0041] Accordingly, the user can activate the override function to cancel the defined 0° basic position on the rear guide part (not shown) by pressing a correspondingly designed and arranged button on the rear guide part in order to pivot the pivoting part 11 into the -1° override position relative to the base part 13.

[0042] The specific design of the stop arrangement, which is effective between the respective guide part and the pivoting part 11 and can be changed by pressing the respective button 19 such that the respective home position is canceled and pivoting into the respective overtravel position is possible, is fundamentally arbitrary. For example, two stops or stop surfaces, effective depending on the position of the button 19, can be provided either on the button 19 or on the pivoting part 11. The arrangement can be selected differently for the two guide parts, i.e., for the front and rear areas.

[0043] It should be noted that the terms "front" and "back" are essentially arbitrary. These terms refer specifically to the working direction along which the operator moves the machine relative to the workpiece during operation.

[0044] Furthermore, it is possible to provide the stop arrangement with an adjusting device with which the position of at least one of the stops or at least one of the stop surfaces can be changed in the pivoting direction, so that, for example, a fine adjustment of the pivoting angle for the respective basic position and / or for the respective overtravel position can be carried out.

[0045] Alternatively or additionally, the principle according to the invention can also be used for one or more intermediate positions between the two basic positions. For example, it is possible to provide the guide parts, or at least one of the guide parts, with more than one button each. It is also possible to provide the button 19 and / or the pivoting part 11 with multiple stop arrangements, which can be successively engaged and disengaged, for example, by correspondingly actuating the button.

[0046] Fig. Figure 2 shows various views of a base part 13 of a specific embodiment of a hand-held circular saw according to the invention. In particular, openings 35 are shown, through which a front guide part 15 (cf. Fig. 4) and a rear guide part 17 (cf. Fig. 6) can be screwed to the base part 13.

[0047] Fig. 3 shows various views of a pivoting part 11 which, in the assembled state, is arranged between the guide parts 15, 17 attached to the base part 13 with quarter-circle segments 57, 59 provided in particular as one piece on the pivoting part 11 and is positively guided on the guide parts 15, 17 so as to be pivotable relative to the base part 13.

[0048] The quarter-circle segments 57, 59 are each provided with two guide ribs 29 which are arranged spaced apart from one another in the radial direction with respect to the pivot axis and each extend concentrically to one another along a circle around the pivot axis.

[0049] In this embodiment, a stop 37 is provided on the front quarter-circle segment 57, which is effective both in the 45° basic position and in the 47° overtravel position. As shown in the illustration below right in Fig. 4 shows, the front guide part 15 is provided with two stops or stop surfaces, namely with a first stop 45 for the 45° basic position and with a second stop 47 arranged offset in the pivoting direction for the 47° overtravel position.

[0050] The 45° stop is formed by the free end of a grub screw, which allows adjustment of the 45° stop surface relative to the front guide part 15.

[0051] According to Fig. 3, the rear quarter-circle segment 59 is provided with a stop 39, which has a bore 41 for a grub screw (not shown here). This grub screw provides a stop for the 0° home position. For this purpose, a screw 39 is provided on the rear guide part 17 (see Fig. 6) a stop surface 51 is provided which, together with the grub screw of the rear quarter circle segment 59 of the swivel part 11 located in the bore 41, defines the 0° basic position.

[0052] Both the front quarter-circle segment 57 and the rear quarter-circle segment 59 are each provided with a stabilizing tab or rib 25 projecting in the direction of the pivot axis. When assembled, this tab 25 projects through a slot or gap on the respective guide part 15 or 17, which is formed between a button 19 (explained in more detail below) and the base body of the guide part 15 or 17. This prevents movements of the button 19 in a plane perpendicular to the pivot axis.

[0053] The front guide part 15 ( Fig. 4) and the rear guide part 17 ( Fig. 6) are each formed as a single-piece plastic part, including a button 19. Two threaded holes 55 are provided on the underside, through which the guide parts 15, 17 can be screwed to the base part 13, as already mentioned above.

[0054] Fig. 4 shows in the lower middle illustration a hole 43 for the grub screw 45 not shown in this illustration (cf. the illustration below right in Fig. 4).

[0055] The button 19 is designed in the shape of a circular segment that runs concentrically between the guide grooves 27. At one end, the button 19 is integrally connected to the base body of the guide part 15. The stop arrangement is formed at the free end of the button 19. In the area of ​​the stop arrangement, a button area is provided for the user to press, on which the angle corresponding to the respective overtravel position is indicated, here "47°."

[0056] Furthermore, Fig. 4 that a circular segment-shaped opening is provided in the base body of the guide part 15 for the button 19, into which the button 19 is embedded.

[0057] The previously mentioned slots or gaps 49 are formed between the button 19 and the base body. In the assembled state, the stabilizing tab 25 of the quarter-circle segment 57 engages in one of these gaps 49.

[0058] The Fig. The rear guide part 17 shown in Figure 6 is designed analogously to the front guide part 15.

[0059] The stop arrangement of the button 19 of the rear guide part 17 comprises, in addition to the 0° home position stop, a second stop 53 which defines the -1° overtravel position and for this purpose cooperates with the grub screw of the rear quarter circle segment 59 of the swivel part 11, which is inserted into the bore 41 (see top right in Fig. 3) of the stop 39. The aforementioned adjustment of the swivel angle is thus carried out in the rear area by turning this grub screw on the rear quarter-circle segment 59.

[0060] The situation at the front guide part 15 shows Fig. 5, namely in the upper illustration in a section perpendicular to the pivot axis, whereby the lower illustration shows a section parallel to the pivot axis at the level of the grub screw 45 of the button 19.

[0061] Of the pivoting part 11, the guide ribs 29 of the front quarter-circle segment 57 are shown in particular, which run in the guide grooves 27 of the front guide part 15.

[0062] Accordingly, Fig. 7 the situation at the rear guide part 17. In the 0° home position, the grub screw 61 of the rear quarter-circle segment 59 interacts with the 0° stop 51 of the button 19. By pressing the button 19, the path for the grub screw 61 and thus for the swivel part 11 is released, so that the swivel part 11 can move into the -1° overtravel position until the grub screw 61 engages the -1° stop 53 of the button 19.

[0063] A special feature of the pivoting guide according to the invention is that the buttons 19 of the two guide parts 15, 17 only need to be deflected temporarily to activate the respective override function and thus need to be elastically deformed. The return to the respective home position thus occurs automatically. The buttons 19 are therefore not under tension in the home position. This ensures an extremely long service life and thus functional reliability of the actuating devices according to the invention for activating the override functions. The described stabilizing tabs 25, which prevent improper movements of the buttons 19, also ensure this long service life.

[0064] In general, it should be noted that in the above explanation, arrangements referring in particular to the virtual pivot axis can alternatively refer to another axis that runs parallel to the pivot axis of the pivoting part 11. The virtual pivot axis is located, in particular, lower than the underside of the base part 13, in particular 6 mm below the underside of the base part 13, in particular in the plane of the underside of an already mentioned, not shown, guide rail for the machine. However, this position of the virtual pivot axis is not mandatory. List of reference symbols 11 Swivel part 13 Base part 15 front guide part for +47° 17 rear guide part for -1° 19 Stop element, actuating element, button 21 Overrun stop on the swivel part 23 Basic stop on the swivel part 25 Stabilizing tab, rib 27 Guide groove 29 Guide rib 33 Stop on the key 35 Opening 37 Stop on the swivel part 39 Stop on the swivel part 41 bore 43 bore 45 grub screw for +45° 47 Stop on the guide part for +47° 49 column, slot 51 first stop for 0° 52 second stop for -1° 55 threaded hole 57 quarter circle segment 59 quarter circle segment 61 Grub screw

Claims

[1] Electric processing machine, in particular a hand-held circular saw, with a pivoting part (11) carrying a tool, in particular a circular saw blade, and a base part (13), relative to which the pivoting part (11) can be pivoted, in particular about a virtual pivot axis, for carrying out bevel machining operations, in particular for making bevel cuts, wherein the pivoting part (11) and the base part (13) are coupled to one another by a pivoting guide (15, 17) which defines a basic pivoting path for the pivoting part (11) between a first basic position and a second basic position, in particular comprising 45°, wherein the pivoting guide (15, 17) provides at least one override function for at least one basic position, which enables pivoting of the pivoting part (11) beyond the basic position into at least one override position, and wherein the override function can be activated by actuating the pivoting guide (15, 17), characterized by , that at least one overtravel function is provided by the pivot guide (15, 17) for each of the two basic positions, the overtravel functions being divided into two sections (15, 17) of the pivot guide spaced apart along a pivot axis. [2] Machine according to claim 1, characterized bythat the pivoting guide comprises at least one guide part (15, 17) acting between the base part (13) and the pivoting part (11), which guide part is fastened to the base part (13) and on which the pivoting part (11) is positively guided, or vice versa, wherein an actuating member (19) for the overtravel function is formed on the guide part (15, 17), and wherein the guide part (15, 17) including the actuating member (19) is provided in the form of a one-piece component, in particular a plastic component. [3] Electric processing machine, in particular a hand-held circular saw, with a pivoting part (11) carrying a tool, in particular a circular saw blade, and a base part (13), relative to which the pivoting part (11) can be pivoted for carrying out bevel machining, in particular for making bevel cuts, in particular about a virtual pivot axis, wherein the pivoting part (11) and the base part (13) are coupled to one another by a pivoting guide (15, 17) which defines a basic pivoting path for the pivoting part (11) between a first basic position and a second basic position, in particular comprising 45°, wherein the pivoting guide (15, 17) provides at least one override function for at least one basic position, which enables pivoting of the pivoting part (11) beyond the basic position into at least one override position, and wherein the override function can be activated by actuating the pivoting guide (15, 17), characterized by , that the pivoting guide comprises at least one guide part (15, 17) acting between the base part (13) and the pivoting part (11), which guide part is fastened to the base part (13) and on which the pivoting part (11) is positively guided, or vice versa, wherein an actuating member (19) for the overtravel function is formed on the guide part (15, 17), and wherein the guide part (15, 17) including the actuating member (19) is provided in the form of a one-piece component, in particular a plastic component. [4] Machine according to claim 3, characterized by that the actuating member (19) is designed as a stop member or comprises a stop member. [5] Machine according to one of claims 2 to 4, characterized by that a movable stop member (19) is formed on the guide part (15, 17) and is movable between a basic state and an overrun state by means of the actuating member. [6] Machine according to one of claims 2 to 5, characterized bythat the actuating member (19) comprises a button which extends along a circular segment around the pivot axis in a plane running perpendicular to the pivot axis, is integrally formed at one end and can be deflected by application at the other end in the direction of the pivot axis with elastic deformation, wherein in particular the button is undeformed in the basic state and automatically returns to the basic state after deflection into the overtravel state. [7] Machine according to claim 6, characterized by that at least one stabilizing tab (25) is formed on the pivoting part (11) or on the base part (13), which stabilizing tab projects in the direction of the pivot axis and runs parallel to the button (19), said stabilizing tab preventing at least a movement of the button (19) exceeding a predetermined amount in the plane running perpendicular to the pivot axis. [8] Machine according to one of claims 2 to 7, characterized bythat the guide part (15, 17) interacts with the pivoting part (11) or base part (13) via at least two radially spaced guide devices (27, 29) each extending along a circular segment around the pivot axis, which are preferably each designed as a groove / rib arrangement. [9] Machine according to one of claims 2 to 8, characterized by that the actuating member (19) is at least substantially embedded in the guide part (15, 17). [10] Machine according to one of claims 2 to 9, characterized by that the guide part (15, 17) has at least approximately the basic shape of a quarter-circle plate. [11] Machine according to one of the preceding claims, characterized byin that the pivoting guide (15, 17) comprises a stop member (19) which can be moved between a basic state and an overtravel state, wherein in the basic state at least one basic stop is effective for determining the basic position and in the overtravel state at least one overtravel stop is effective for determining the overtravel position. [12] Machine according to claim 11, characterized by that an adjusting device (45, 61) is provided on the stop member (19) and / or on the base part (13) or pivoting part (11), with which the basic position and / or the overtravel position can be changed, in particular for the purpose of fine adjustment. [13] Machine according to one of the preceding claims, characterized by that the pivoting guide comprises two guide parts (15, 17), each of which acts between the base part (13) and the pivoting part (11), is designed as separate components and is arranged at a distance from one another along a pivot axis. [14] Machine according to one of the preceding claims, characterized by , that the first basic position is a 0° position corresponding to an angle of 90° between the tool and a base plane defined by the base part (13), and that the second basic position is a 45° position with an angle of 45° between the tool and the base plane, wherein the overrun position is preferably a -1° position or a 47° position.

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