Tool turret

Abstract

2. Tool turret with a base body (10) to be attached to or attached to a machine tool, the base body having a turret axis (14) about which a tool disk (18) is rotatably mounted on the base body (10) by means of a drive (16), the tool disk having several tool stations (20) distributed around its circumference, which can each be brought into at least one working position (24) by rotating the tool disk (18) and subsequently locking it in place, wherein a lubrication device (58) has at least two separate lubricant inlets (60, 62) which are each connected to a gearbox (34, 38) of an associated gearbox (32, 36) such that the respective gearbox (32, 36) can be selectively supplied with the same or different lubricants in the inlet (64, 65) and that at least one lubricant outlet (66, 68) opens into one of the gearboxes (38), into which lubricants from both gearboxes are supplied. (32, 36) flows into the return line (70).

Description

[0001] The invention relates to a tool turret with a base body to be attached or is attached to a machine tool, which has a turret axis around which a tool disk is rotatably mounted on the base body by means of a drive, said tool disk having a plurality of tool stations distributed around its circumference, which can each be brought into at least one working position by rotating the tool disk and subsequently fixing the same, in which a tool drive located inside the tool disk and drivable by means of a gear train, with its drive-side coupling part, engages with a tool-side coupling part for driving a tool located at the tool station aligned with the working position, wherein the gear train for the tool drive has a gear in a gear chamber within the tool disk and a further gear in the further gear chamber within the base body,which can be coupled to the drive, whereby both gears are connected to each other via an operative connection, and whereby the individual gears are supplied with lubricant in their gear chambers by means of at least one lubricating device.

[0002] Tool turrets of this type are state-of-the-art (DE 10 2007 043 775 A1) and are regularly integrated into complex machine tools. The tool disk, which can be pivoted around a turret axis, has tool stations arranged at equal angular intervals around the circumference, each of which can be moved into at least one working position by rotating the tool disk. The tool stations, for example twelve in number, have a tool holder for machining tools, which are in particular rotating tools for machining workpieces, such as drilling and milling tools.The column part, on which the tool disk is mounted so as to be rotatable about the turret axis, has, in addition to a base body, a swivel drive for the tool disk mounted on a bearing plate and a drive motor mounted on a motor plate, which, via a gear housing part mounted on the base body, forms a rotary drive for a rotating machining tool. The tool is located in the respective tool holder of the tool disk aligned with the working position and comes into coupling engagement with the respective machining tool via a coupling device located in the gear housing part.

[0003] DE 10 2015 003 878 A1 discloses such a tool turret, comprising a tool disk that can be pivoted into selective positions relative to a column part. The column part comprises at least a housing base, a gear housing part, and a bearing and motor plate. At least the base, the gear housing part, and the bearing and motor plates are combined in a single, space-saving housing. However, a modular design is also possible.

[0004] The gear trains of such tool turrets are usually equipped with a lubrication device. In the simplest case, a gear chamber for the gear is permanently filled with lubricating grease. The friction partners of the gear train then run in the grease and are lubricated by it. The lubricating grease is distributed by adhering to the friction partners, with the lubricant being introduced by the lubrication device during assembly and, in particular, only after delivery to the respective customer. The grease thus provides a one-time, permanent filling of the gear chamber of the tool turret and is only replaced when necessary in the event of repair. For this purpose, the gear chamber is then completely sealed, preventing any unintentional leakage of grease.Grease lubrication can be implemented cost-effectively in this way. However, grease is often difficult to work, resulting in unwanted high work and thus high heat input in the gear train. However, high heat input, in turn, reduces the service life of the lubricant and thus the duty cycle of the tool turret, as well as uniform heat transfer between the tool turret components, which can lead to unwanted material stresses. Therefore, grease lubrication is usually only used at low speeds.

[0005] DE 10 2008 045 181 B3 discloses a tool turret with a base body which is to be attached or is attached to a machine tool and which defines a turret axis about which a tool disk is rotatably mounted on the base body, said tool disk having a plurality of tool stations distributed around its circumference which can each be adjusted into at least one working position by rotating the tool disk, in which position a tool drive located inside the tool disk with its output-side gear part which can be rotated about an axis of rotation radial to the turret axis comes into coupling engagement with a tool-side coupling part for driving at least one tool which is located at the tool station aligned with the working position, wherein the output-side gear part is arranged in the tool disk so as to be pivotable about the turret axis.Furthermore, a switching clutch is present in the tool disk, which can be switched between a first switching position, in which the output-side gear part is connected to the tool disk for a pivoting movement about the turret axis, into a second switching position in which the output-side gear part is decoupled from the tool disk.

[0006] In addition to the grease lubrication already mentioned, other lubricating media can also be introduced using the corresponding lubrication system, such as lubricating oils, for example, to implement oil sump lubrication, oil-air lubrication, or oil mist lubrication. However, the known lubrication system only ever provides one type of lubrication for the friction partners of one or more gear trains.

[0007] Based on this prior art, the invention is therefore based on the object of improving the lubrication of a tool turret, particularly in the form of a disk-type tool turret, and in particular of being able to adapt the lubrication to different requirements. This object is achieved by a tool turret having the features of patent claim 1 in its entirety.

[0008] According to the invention, to achieve this object, the lubrication device comprises at least two separate lubricant inlets, each connected to a gear chamber of an associated gear unit in such a way that the respective gear unit can be optionally supplied with the same or different lubricants in the inlet, and at least one lubricant outlet opens into one of the gear chambers, into which lubricant flows from both gear units in the return flow. This creates a variable lubrication option that can be readily used in all types of tool-driven tool turrets, if necessary, even as part of a retrofit.

[0009] This means that with just one lubrication device and the associated lubricant inlets or connections, a wide variety of lubrication types can be implemented, for example in the form of a - Grease lubrication, - Oil sump lubrication, - Oil-air lubrication, or - Oil mist lubrication.

[0010] For example, a tool turret subject to low stress, for example, when operated only at low speeds, can have a gear chamber greased with a suitable lubricating grease via one lubricant inlet. For higher stresses on the same tool turret, for example, when operated at higher speeds or with alternating loads, another gear chamber can be oil-lubricated via a different lubricant inlet, spatially separated from the grease inlet. Experience has shown that an oil sump created by conventional oil lubrication can be moderately easily worked, resulting in only moderate friction and moderate heat input. The decision regarding the lubricant to be used is usually made on-site at the customer's site prior to commissioning.A subsequent change of the lubricating medium is possible, but in practice would involve disassembly and cleaning work, especially if you want to change from grease to oil lubrication.

[0011] For tool turret solutions subject to even greater operational stress, oil-air lubrication or oil mist lubrication can be implemented using differently designed lubrication systems, which are always different from a grease lubrication system. Especially with oil mist lubrication, this lubricant can be easily worked, resulting in almost no friction, and thus only a very low heat input into the friction or gear components of the respective gear train used.

[0012] This switching between lubricant options in a tool turret with only one lubrication device has no equivalent in the state of the art. Typically, just one lubricant outlet is sufficient to drain the various lubricants, except for the high-viscosity grease that requires intensive lubricating, from the respective tool turret's gearbox to the outside during maintenance or replacement. A type of circulating lubrication for the tool turret can also be implemented via the inlets and outlets if necessary.If several separate gears are used, for example, one gear for the swivel drive of the tool disk and at least one further drive for driving a machining tool that is secured to the disk in an associated holder via a further gear stage separate from the first gear train, a separate lubrication system with a separate lubricant supply can be created for each gear. This allows both the one and the other lubrication types to be used in a single tool turret, for example, grease lubrication for the swivel drive of the tool turret and a less intensive lubrication, for example, in the form of oil mist lubrication, for the tool drive of a machining tool on the tool disk.Accordingly, one type of lubricant inlet can be used to supply a fluid with high working intensity, such as gear grease, and the other type can be used to supply a fluid with less working intensity, such as gear oil. However, it is also possible to use both or all types of lubricant inlets for only one type of lubricant, particularly in the context of oil-air lubrication. It has proven particularly advantageous if the lubricant in the return line flows into a central gear chamber and can then be removed from the system via an associated lubricant outlet.

[0013] In a preferred embodiment of the tool turret according to the invention, it is provided that the turret axis has a rod-shaped support body which is at least partially penetrated by a fluid channel which is connected at one end region to the one lubricant inlet and at its other end region at least partially opens into at least one annular channel which supplies the one gear in the inlet with lubricant.

[0014] Preferably, it is further provided that a lubricant return occurs from the side of one gear along a gap guide formed by the outer circumferential side of the carrier body, which is surrounded at a predeterminable radial distance by a hollow shaft that establishes the operative connection between the two gears. In this way, a supply of lubricant to one gear, which is located at one end of the carrier body forming the turret axis, is possible over a very long distance, as well as a return flow towards the other free end of that carrier body. The lubricant in the supply and return lines is introduced into the tool turret in a predeterminable quantity, whereby a predeterminable quantity can be constantly circulating and, moved by the individual gears, serves to dissipate heat.If circulating lubrication is desired, the lubricant continuously introduced into and removed from the tool turret can also be cleaned outside the tool turret, for example, using filter elements that remove any particulate contamination from the fluid flow. Furthermore, it is possible to replace used lubricant with new lubricant, especially if oil-air lubrication is implemented via the lubricant supply. This oil-air mixture is preferably sprayed onto the gears of a gearbox or gear stage to ensure even distribution.

[0015] In a further preferred embodiment of the tool turret according to the invention, the additional gear chamber has a reduction gear as an additional gear, which adapts the speed of the drive motor to the speed required for driving the tool, and the middle gear of the reduction gear meshes with the output gear located on the hollow shaft. In this way, the actual drive can be located by means of the drive motor and the reduction gear at a location where there is space, preferably in the rear area of ​​the tool turret, in order to transmit the power from there via the hollow shaft to the gear parts that are directly responsible for driving a rotating machining tool. In this respect, the lubricant is supplied separately from the first lubricant supply into the corresponding gear chamber with the additional gear.

[0016] In another particularly preferred embodiment of the tool turret according to the invention, it is provided that a lubricant drain is provided in the base housing at each of two different removal points such that, when the installation positions are offset by 90 degrees to one another as the respective end position, one of the lubricant drains always forms a lower removal point for the lubricant drain; the same applies if the respective installation position lies between the aforementioned end positions. Preferably, a fluid-carrying cross-connection runs within the base housing within the further gear chamber between the two adjacent lubricant drains.To this end, the turret has two lubricant drains, or rather bore-like drain openings, and a cross connection between the individual gear compartments, so that, depending on the installation position of the tool turret, the lubricant can be centrally drained or extracted on the right or left side of the turret. The lubricant drains must be equipped with appropriate connections to allow the connection of an extraction device with its extraction nozzles. This drainage function also applies if the tool turret is tilted, for example, 45 degrees to the left or 45 degrees to the right compared to a normal installation position, depending on the type of machine on which the turret is mounted.In this respect, regardless of the mounting position, a lower drain point of the corresponding gearbox compartment is at a different location; however, it still forms a lowest point for the drainage of lubricant from the respective gearbox compartment as a whole.

[0017] In a further preferred embodiment of the tool turret according to the invention, the additional gear chamber forms the fluid-conducting subchambers, which at least partially enclose the respective gears of the additional gear at a predeterminable radial distance. The radial distances formed prevent squeezing of the lubricant, which in turn benefits a low operating temperature, and the lubricant, preferably also in the form of an oil-air mixture, is applied to the gears of the additional gear, or the gears run in the corresponding lubricant bath.

[0018] In a further preferred embodiment of the tool turret according to the invention, it is provided that, in order to realize an emergency running property during operation, a gearwheel of the additional gear unit, which is arranged lowest in the row, rotates in a subchamber in which lubricant is accumulated up to a predeterminable amount. This provides the tool turret with a type of emergency lubrication, i.e., should the oil-air lubrication fail, lubrication, at least of the additional gear unit, is still guaranteed for a certain period of time. In terms of design, the lubricant drain or drain or suction hole was positioned at a lower point of the associated gear unit chamber; but not at the lowest point. This permanently creates an oil level in the additional gear unit chamber up to the height of the lubricant drain, and does not drain completely.A friction partner is permanently immersed in this lubricant bath and distributes the lubricant by adhesion to the other friction partners of the respective gear train, even if the oil-air lubrication fails.

[0019] In a further preferred embodiment of the tool turret according to the invention, one gear with its housing space is provided as part of a gear head arranged stationary in the tool disk, around which the tool disk is rotatably guided on the support body. The gear head can be secured relative to the base body in at least one predeterminable working position by means of a coupling, such as a Hirth gear. Thus, the gear head and the base housing form a kind of stable support component around which the tool disk, with its holders and associated machining tools, can rotate.

[0020] In the following, the tool turret according to the invention is explained in more detail using an exemplary embodiment according to the drawing. In this diagram, not to scale, the Fig. 1 in perspective rear view of the essential components of the tool turret which is shown partially in section and without electric drive motor; Fig. 2 a longitudinal section through the tool turret after the Fig. 1 with schematically shown drive motor; Fig. 3 a partially sectioned section of a lubricant supply for a gear head, which is driven by a tool disc according to the Fig. 1 and Fig. 2 is included; and Fig. 4 a frontal rear view of the tool turret after the Fig. 1 with fluid guides indicated by dashed lines and with arrows that essentially show the flow direction of the fluid.

[0021] The Fig. The tool turret shown in Figure 1 comprises a base body 10 with a ring eyelet 12 mounted on the top, which serves for the engagement of a load-bearing device (not shown), by means of which the tool turret can be handled as a whole, in particular, can be moved to a location on a machine tool. The base body 10 comprises a turret axis 14, around which a drive 16 (only in Fig. 2) rotatably mounted on the base body 10 on its front end face, a tool disk 18 is mounted in the usual way, so that this will not be discussed in more detail here. The tool disk 18 has a plurality of tool stations 20 which are equidistantly spaced from one another along its circumference and are covered by covers 22 when not in use. If the respective cover 22 is removed from a tool station 20 of the tool disk 18, a holder with an associated, in particular rotatable, machining tool can be inserted into the tool disk 18. The corresponding construction is also usual, so that it will not be discussed further here.By rotating the tool disk 18 and subsequently securing it to the base body 10, the tool stations 20 can be brought, for example in succession, into a working position 24 in which a tool drive 28 located inside the tool disk 18 and drivable by means of a gear train designated as a whole by 26, with its drive-side coupling part 30 comes into coupling engagement with a tool-side coupling part for driving a tool in a conventional manner and therefore not shown, which is located at the tool station 20 aligned with the working position 24.

[0022] The gear train 26 for the tool drive 28 has a gear 32 in a gear chamber 34 within the tool disk 18. Another gear 36 (see Fig. 4) is arranged in a further gear chamber 38 within the base body 10, in its rear region. The further gear 36 and thus the gear train 26 can be coupled to the one gear 32 with the drive 16, which preferably consists of an electric motor, such as a synchronous motor or an asynchronous motor. Both gears 32, 36 are connected to each other via an operative connection in the form of a hollow shaft 40.

[0023] The Fig. 4 further gear 36 has a simplified drive gear 42 which is mounted in the usual way on the drive axle 44 ( Fig. 2) of the drive 16 in the form of the electric motor.

[0024] The respective drive gear 42 in turn meshes with an intermediate gear 46, which in turn meshes with a driven gear 48, whose external teeth are in the Fig. 4. The further gear 36 constructed in this way is accommodated in a further gear chamber 38, namely in the rear area of ​​the base body 10, which is formed by a solid end plate 50. The Fig. The gearwheel arranged at the bottom as seen in Figure 4 in the form of the output gearwheel 48 is penetrated by the hollow shaft 40, which is flush with the output gearwheel 48 at its rear free end and forms a rotationally fixed connection with the latter. At its front area and at a transition point to the tool disk 18, the hollow shaft 40 has a spur gearing 52 that meshes with a spur gearwheel 54 of the gearing 32 for the tool drive 28. In this respect, the drive torque acting along the turret axis 14 is deflected at right angles via the gearings 52, 54, so that the drive axis of the tool drive 28 is perpendicular to the turret axis ( Fig. 3). As can be seen from the Fig. 3 further shows that a shaft toothing 56 is introduced onto the outer circumference of the hollow shaft 40 in the rear area, for example in the form of a spline shaft toothing, onto which the output gear 48 with a corresponding internal toothing can be pushed for a rotationally fixed connection.

[0025] As can also be seen from the figures, the tool turret has a lubricating device, designated as a whole by 58, by means of which the individual gears 32, 36 are supplied with lubricant in their gear chambers 34 and 38, respectively. For this purpose, the lubricating device 58 has two spatially separated lubricant inlets 60 (Z1), 62 (Z2), each of which is connected to a gear chamber 34, 38 of an associated gear 32, 36 in such a way that the respective gear 32, 36 can be supplied with either the same or different lubricants in the respective inlet 64, 65, and that at least one lubricant outlet 66, preferably in conjunction with a further lubricant outlet 68, opens into one of the gear chambers, here the further gear chamber 38, into which lubricant flows from both gears 32, 36 via the return line 70, 71.

[0026] As can be seen from the Fig. 1, the second lubricant inlet 62 is arranged almost congruently in front of the first lubricant inlet 60 in the longitudinal direction. As can be seen in particular from the Fig. 3, the turret axis 14 has a rod-shaped linear support body 72, which is at least partially penetrated by a fluid channel 74, which is connected at one end region 76 to the one lubricant inlet 60. It is understood that if lubricant is to be introduced into the fluid channel 74 or if lubricant is already present in the lubricant system of the tool turret, the lubricant inlet 60 can be closed by means of a closing screw 78. Similar considerations also apply to the second lubricant inlet 62. At its other end region 80, the fluid channel 74 opens into an annular channel 82 via a transverse bore in the support body 72, via which annular channel 82 the tool drive 28 can be supplied with lubricant from the fluid channel 74. Likewise, the supply of lubricant at the front end region 76 of the support body 72 can be carried out in a comparable manner via an annular feed channel 84.The return flow 70 of lubricant from the gear chamber 34 of the tool drive 28 in the direction of the further gear chamber 38 with the three gears 42, 46 and 48 takes place along a gap guide 86, formed by the outer circumferential side of the carrier body 72, which is enclosed by the hollow shaft 40 at a predeterminable radial distance, forming the gap of the guide 86, which creates the already mentioned, torque-transmitting operative connection between the two gears 32 and 36. In this way, the gap guide 86 serves for the lubricant return flow 70 at this point. For the outlet of lubricant from the gap guide 86 into the further gear chamber 38 in the area of ​​the output gear 48, in the direction of view. Fig. 3, the hollow shaft 40 is axially offset in length relative to the support body 72. For improved sealing and guidance of the stationary support body 72, i.e., the turret axis 14, lubrication and sealing grooves 88 can be introduced into the cylindrical support body 72 in packages at the end. The support body 72, hollow shaft 40, and gap guide 86 are preferably arranged concentrically to the turret axis 14.

[0027] As in particular the Fig. 4 shows, the further gear 36 in the further gear chamber 38 is designed as a reduction gear which adapts the speed of the drive 16 to the required speed for the tool drive 28, wherein, as already explained, the middle gear 46 of the reduction gear meshes with the output gear 48 which is seated on the hollow shaft 40 in a rotationally fixed manner by means of the shaft toothing 56.

[0028] As the Fig. As further shown in Figure 4, a lubricant outlet 66, 68 is provided in the base housing 10 at two different or spaced-apart extraction points such that, when the installation positions are offset by 90° to each other as the respective end position, one of the lubricant outlets 66 or 68 always forms a lower extraction point for the drainage of lubricant from the base housing 10. This also applies in the case that, as in Fig. 4, the respective installation position lies between the mentioned end positions, for example, is pivoted by 30° relative to the horizontal. How further the Fig. 4 shows, a fluid-carrying cross connection 90 is arranged within the main housing 10 within the further gear chamber 38 between the two lubricant outlets 66, 68. The channel-like cross connection 90 connects two sub-chambers 92, 94 of the drive gear 42 and the driven gear 48 at their lowest point in the Fig. 4. A gear compartment 96 is provided for the intermediate gear 46. The corresponding compartments 92, 94 and 96 surround the respective associated gear 42, 46, 48 with a predeterminable radial distance and serve for the lubricant circulation. Thus, lubricant supplied via the second lubricant inlet 62 into the further gear 36 via the inlet 65 is directed in the direction of view 64 onto the Fig. 4, the lubricant is carried counterclockwise by the driven gear 48 and passed on to the subchamber 96 with the intermediate gear 46. Due to its toothing, this gear now carries the lubricant clockwise to the further subchamber 92 with the drive gear 42, which also carries the lubricant clockwise in a fluid flow. Via the already mentioned cross connection 90, lubricant then reaches the lowest point of the sub-chamber 92 into a lower region of the sub-chamber 94 with the output gear 48. A further fluid-carrying cross connection 98 exists above the one cross connection 90 for the purpose of transferring lubricant from the third sub-chamber 96 into the second sub-chamber 94. Drain channels 100 are connected to the bottom of both the sub-chamber 92 and the second sub-chamber 94, which connect the respective lubricant drain 66, 68 with an associated sub-chamber 94 or 92.In this respect, a possibility of the return line 71 from the further gear 36 to a collection point for lubricant is created, wherein the corresponding outlets 66, 68 are closed during operation of the tool turret, in any case if no circulating lubrication is provided, for example by using spring-loaded check valves which can be opened by a suction device (not shown) against the direction of the return line 71.

[0029] It is understood that the further gear chamber 38 with its sub-chambers 92, 94, 96 is in the direction of view of the Fig. 4, extends into the plane of the drawing, so that the gap guide 86 opens as the first return 70 into the sub-chamber 94 with the output gear 48.

[0030] In the illustrated embodiment, both lubricant circuits are to be supplied with an oil-air lubricant via connections 60, 62. However, it is also possible to supply a gear head 102 with the tool drive 28 with an oil-air lubricant via the lubricant inlet 60 and to equip the additional gear chamber 38 with an oil filling as a lubricant. The tool disk 18 is rotatably mounted on the stationary gear head 102 by means of the drive 16, and when the tool drive 28 is stopped, the tool disk 18 can be driven in a known manner via a stepped gear 104, which can be coupled to the stepped gear 104 by means of Hirth gears 106.For this purpose, the Hirth toothings 106 have circular individual toothings which, arranged concentrically to the turret axis 14, enable torque transmission from the step gear 104 as soon as a hydraulically actuated coupling piece as a clutch 108 is in its in the . Fig. 2 and, with its spur gearing, couples the two concentrically arranged partial gears parallel to one another in a plane in a releasable manner. In this way, an output shaft 110 of the multi-stage transmission 104 can be coupled to the tool disk 18 for pivoting the tool disk 18 ( Fig. 2).

[0031] The respective multi-stage gear unit 104 also has a multi-stage gear unit chamber 112, which is preferably provided with a suitable medium for oil or grease lubrication as a lubricant. It is understood that the aforementioned lubrication circuits for the gear units 34, 38, and 112 are spatially separated from one another in such a way that, if necessary, a wide variety of lubricants can be used for a single tool turret with just one lubrication device 58 via various lubricant inlets and outlets 60, 62 and 66, 68, respectively.

[0032] Finally, it should be mentioned that, in order to implement emergency running during operation, the gearwheel arranged lowest in the row—here, gearwheel 48 of the further gear unit 38, which rotates in the subchamber 94—can be used to store a certain, predeterminable quantity of lubricant, thus ensuring a supply of lubricant in all circumstances. In this way, if, for example, the oil-air lubrication for the tool drive 28 should fail, lubrication of the gear train 26 with the gear unit 32 and the oil lubrication provided for this purpose can still be maintained for a certain period of time. For this purpose, a drain hole or suction hole 114 was positioned at the lower point of the subchamber 94; however, not at the lowest point as specified by the lubricant drain 66.In this way, a predeterminable fluid level with an oil medium as a lubricant is created in the gear subchamber 94, into which a friction partner in the form of the output gear 48 permanently engages, and as shown in the illustration according to the . Fig. 4, the lubricating medium is further distributed by adhesion to the other friction partners in the form of the drive gear 42 and the intermediate gear 46, even in the event of failure of the oil-air lubrication for the gear head 102, so that emergency lubrication for predeterminable gear parts of the tool turret is achieved. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2007 043 775 A1

[0002] DE 10 2015 003 878 A1

[0003] DE 10 2008 045 181 B3

[0005]

Claims

[1] Tool turret with a base body (10) to be attached or attached to a machine tool, which has a turret axis (14) about which a tool disk (18) is mounted rotatably on the base body (10) by means of a drive (16), said tool disk having a plurality of tool stations (20) distributed around its circumference, which can each be brought into at least one working position (24) by rotating the tool disk (18) and subsequently fixing it, in which a tool drive (28) located inside the tool disk and drivable by means of a gear train (26) with its drive-side coupling part (30) comes into coupling engagement with a tool-side coupling part for driving a tool located at the tool station (20) aligned with the working position (24),wherein the gear train (26) for the tool drive (28) has a gear (32) in a gear chamber (34) within the tool disk (18) and a further gear (36) in a further gear chamber (38) within the base body (10), which can be coupled to the drive (16), wherein both gears (32, 36) are connected to one another via an operative connection (40), and wherein the individual gears (32, 36) are supplied with lubricant in their gear chambers (34, 38) by means of at least one lubricating device (58), , characterized bythat the lubricating device (58) has at least two separate lubricant inlets (60, 62), each of which is connected to a gear chamber (34, 38) of an associated gear (32, 36) in such a way that the respective gear (32, 36) can be supplied optionally with the same or different lubricants in the inlet (64, 65) and that at least one lubricant outlet (66, 68) opens into one of the gear chambers (38), into which lubricant flows from both gears (32, 36) in the return line (70). [2] Tool turret according to claim 1, characterized byin that the turret axis (14) has a rod-shaped support body (72) through which a fluid channel (74) passes at least partially, which is connected at one end region (76) to the one lubricant inlet (60) and at its other end region (80) opens at least partially into at least one annular channel (82) which supplies the one gear (32) in the inlet (64) with lubricant. [3] Tool turret according to claim 1 or 2, characterized by that a lubricant return (70) from the side of one gear (32) takes place along a gap guide (86), formed by the outer circumferential side of the carrier body (72), which is surrounded at a predeterminable radial distance from a hollow shaft (40) which establishes the operative connection between the two gears (32, 36). [4] Tool turret according to one of claims 1 to 3, characterized bythat the further gear chamber (38) has, as a further gear (36), a reduction gear which adapts the speed of the drive (16) to the required speed for the tool drive (28) and that the middle gear (46) of the reduction gear meshes with an output gear (48) which is seated on the hollow shaft (40). [5] Tool turret according to one of the preceding claims, characterized by that at two different removal points, a lubricant outlet (66, 68) is provided in the base housing (10) in such a way that, when the installation positions are offset by 90 degrees to one another as the respective end position, one of the lubricant outlets (66, 68) always forms a lower removal point for the drainage of lubricant; the same applies if the respective installation position lies between the said end positions. [6] Tool turret according to one of the preceding claims, characterized bythat within the further gear chamber (38) between the two lubricant outlets (66, 68) a fluid-carrying cross connection (90) runs within the base housing (10). [7] Tool turret according to one of the preceding claims, characterized by that the further gear chamber (38) forms fluid-conducting subchambers (92, 94, 96) which at least partially encompass the respectively accommodated gear wheels (42, 46, 48) of the further gear (36) with a predeterminable radial distance. [8] Tool turret according to one of the preceding claims, characterized by in that, in order to realize an emergency running property during operation, a gear wheel (48) of the further gear (36) arranged at the bottom of the row rotates in a partial space (94) in which lubricant can accumulate up to a predeterminable amount. [9] Tool turret according to one of the preceding claims, characterized bythat one gear (32) with its gear chamber (34) is part of a gear head (102) which is arranged stationary in the tool disk (18), about which gear head the tool disk (18) is rotatably guided on the carrier body (72), which can be fixed in at least one predeterminable working position on the base body (10) relative to the latter by means of a coupling (108). [10] Tool turret according to one of the preceding claims, characterized by that one type of lubricant inlet (62) is used to supply a high-viscosity fluid, such as a gear grease, and the other type of lubricant inlet (60) is used to supply a fluid with a low viscosity, such as a gear oil, or that both inlets (60, 62) supply one and the same lubricant of the same viscosity to the respective gear (32, 36, 112).

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