Automatic train coupling

Abstract

The invention relates to an automatic train coupling, in particular for a freight wagon of a rail vehicle, comprising: a coupling head which comprises a coupling head housing and a coupling fastener having a lock, the coupling fastener being designed as a rotary fastener having a coupling link and a central part, the central part being rotatable about a main axis between a couple-ready position, a coupled position and an uncoupled position, the coupling link being connected at a first end to the central part so as to be rotatable about a coupling link axis and having a second free end; and the central part having an opening which is arranged for receiving a second end of a coupling link of a diametrically opposed coupling head, and the central part being rotatable against the force of a spring-loaded accumulator from the coupled position into the uncoupled position and by way of the force of the spring-loaded accumulator from the uncoupled position into the coupled position; a lubrication device by means of which lubricant can be supplied to at least one lubricated point in the coupling head, wherein the lubrication device has one or more lubricant channels in the coupling head. The automatic train coupling is characterised in that at least one lubricant channel extends through the central part.

Description

[0001] Automatic train coupling

[0002] The present invention relates to an automatic train coupling, in particular for a freight wagon of a rail vehicle, according to the preamble of claim 1.

[0003] In practice, automatic train couplings of this type are known, which comprise a coupling head with a coupling housing and a coupling lock with a locking mechanism. The coupling lock is designed as a rotary lock with a coupling eye and a frog. The frog is rotatable about a main axis between a ready-to-couple position, a coupled position, and an uncoupled position. The coupling eye is connected to the frog by a first end rotatable about a coupling eye axis and has a second free end. The frog has a mouth for receiving a corresponding second end of a coupling eye of a matching coupling head.

[0004] The frog is equipped with a spring-loaded mechanism. The frog can be rotated from the coupled position to the uncoupled position against the force of the spring-loaded mechanism, and from the uncoupled position to the ready-to-couple position and from the ready-to-couple position to the coupled position by the force of the spring-loaded mechanism.

[0005] Preferably, the locking mechanism, which holds the coupling lock in the appropriate position or releases it accordingly for transition to another position by rotating the frog, has a plunger displaceable in the coupling direction of the train coupling against a spring force and a ratchet bar displaceable transversely or diagonally to the coupling direction. The ratchet bar is pivotally connected to the frog and, upon rotation from the frog from the coupled position to the uncoupled position, can be displaced by the frog into a detent position in which the ratchet bar blocks rotation of the frog back, i.e., in the direction from the uncoupled position to the coupled position. The plunger, in turn, is movable between a first position and a second position.In the first position, in which the punch is moved against the spring force, the punch blocks the ratchet rod in the locking position and in the second position, in which the punch is moved from the first position by the spring force, the punch releases the ratchet rod from the locking position.

[0006] The function of this type of automatic train coupling is as follows: Two identical coupling heads on two vehicles to be coupled together are locked together by inserting the second end of the respective coupling eye into the mouth of the frog of the other coupling head and holding it in a positive fit by turning the frog there. This mechanically couples the two vehicles. The two coupling locks are loaded exclusively by tensile forces, which are evenly distributed between both coupling eyes within the parallelogram formed by the coupling eyes and the frogs. Compressive forces, on the other hand, are transmitted by a special profile on the front of the coupling head housing. This profile usually comprises a cone and a funnel, which are enclosed by a wide, particularly flat, front surface, as is advantageous in the present invention.The profile can be formed by a separate end plate attached to the front of the coupling head housing. The profile, together with the cone and funnel, can form sliding and centering surfaces, and in particular, determine the gripping area in terms of lateral, vertical, and angular offset. When the coupling heads meet, they center themselves and slide into each other.

[0007] When two rail vehicles are moving towards each other, their coupling locks or frogs are in a position ready for coupling, in which the frogs are held, for example, by the ratchet rods that are in the locked position. When coupling, the cones dip into the funnels of the coupler head housing profiles. The cones press on the pistons and push them back, causing the pistons to release the ratchet rods from their locked position. This releases the coupling locks and rotates them under the force of the respective spring accumulator until the frog hits a predetermined stop, usually the coupler head housing. The coupling eyes guided in the funnels engage in the frog mouths, the two coupling locks are interlocked and the coupled position is achieved. Accidental separation of the coupling locks is not possible.Normal wear and tear does not affect the security of the dome closure.

[0008] To uncouple the coupling heads, a decoupling device rotates both coupling locks, i.e., the two frogs, against the force of the spring-loaded mechanisms until the coupling eyes slide out of the frogs' mouths. The rotating frogs are intended, in particular, to displace the ratchet rods sufficiently so that, when the vehicles are separated, the frogs are prevented from rotating back from the uncoupled position beyond the ready-to-couple position by moving the ratchet rods into their locking positions.

[0009] Since two coupling heads always work together during coupling and uncoupling, the train couplings are designed so that the coupling heads or coupling locks operate alternately. For example, if a coupling lock is released with a manual or automated uncoupling mechanism by rotating its frog against the force of the spring-loaded mechanism, this rotational movement is transmitted to the opposite frog via the coupling eye, which is articulated to the frog, and the jaws of the opposite frog. Accordingly, the opposite frog transmits its rotational movement to its ratchet rod, which engages the latching position.

[0010] The above-described generic automatic train coupling is disclosed, for example, in DE 10 2019 102 455 A1. All components disclosed therein, in particular as described above, and their functions can be provided in an advantageous embodiment of the present invention.

[0011] DE 10 2019 114 237 A1 describes another generic automatic train coupling. In the train coupling described therein, at least one lubrication device is provided for joints and movement points of various components of the train coupling, in particular for the coupling rod, the coupling head, and the bearing block. The lubrication device comprises at least one lubricant source and one or more lubricant lines connected to the lubricant source in a lubricant-conducting manner. The lubricant lines can, for example, comprise passages and / or channels in components and / or flexible hose lines and / or rigid lines on components and / or between components. Using a lubricant distributor, the lubricant from the lubricant source can be distributed to various joints and movement points.According to one embodiment, a lubricant channel is integrated in the main bolt, which is supplied with lubricant via a lubricant line.

[0012] Although a lubrication system is already known for train couplings of this type that can automatically supply lubricant from a common lubricant source to various lubricated points, this design requires a comparatively complex distribution of the lubricant, usually via external lines in the form of hoses or rigid pipes. Automatic train couplings, which are manually lubricated during maintenance, usually have one or more lubrication points with a grease nipple near the coupler head, through which lubricant can be introduced into the coupler head. However, such grease nipples are difficult for service personnel to reach, as the lubrication points are usually only accessible from below the coupler head, i.e., from below the track bed, and even uncoupling and moving two train couplings apart is necessary for comprehensive lubrication.

[0013] The present invention is therefore based on the object of improving a generic automatic train coupling in such a way that lubrication of at least one lubricated point in the coupling head is facilitated. In particular, access to one or more lubrication points for manual lubrication, for example, via a grease nipple, is to be made easier for a service technician.

[0014] The object of the invention is achieved by an automatic train coupling having the features of claim 1. The dependent claims specify advantageous and particularly expedient embodiments of the train coupling according to the invention.

[0015] An automatic train coupling according to the invention, in particular for a freight car of a rail vehicle, has a coupling head comprising a coupling head housing and a coupling lock with a locking mechanism. The coupling lock is designed as a rotary lock with a coupling eye and a frog, wherein the frog is rotatable about a main axis between a ready-to-couple position, a coupled position, and an uncoupled position. In principle, the uncoupled position can coincide with the ready-to-couple position, or, viewed from the coupled position, the uncoupled position is provided beyond the ready-to-couple position, relative to the rotational movement of the frog.

[0016] The coupling eye is connected to the frog at a first end so as to be rotatable about a coupling eye axis and has a second free end. The second free end forms in particular a crossbar in order to achieve the eye-like shape of the coupling eye. The frog has a mouth which is arranged to receive a second end of a coupling eye of an opposing coupling head, and the frog can be rotated against the force of a spring actuator from the coupled position to the uncoupled position and by the force of the spring actuator at least from the uncoupled position to the coupled position, in particular if the uncoupled position does not coincide with the ready-to-couple position, by the force of the spring actuator from the uncoupled position to the ready-to-couple position and from the ready-to-couple position to the coupled position. In particular, the cross bar of the coupling eye is inserted into the mouth.

[0017] Preferably, the locking mechanism of the coupling lock comprises a plunger that can be displaced in the coupling direction of the train coupling against a spring force, and a ratchet bar that can be displaced transversely or diagonally to the coupling direction. The ratchet bar is then preferably connected to the frog in an articulated manner and, upon rotation from the frog from the coupled position to the uncoupled position, can be displaced by the frog into a locking position, in which the ratchet bar blocks rotation of the frog from the uncoupled position to the coupled position.

[0018] The plunger blocks the ratchet rod in the locking position in a first position displaced against the spring force and releases the ratchet rod from the locking position when it is in a second position displaced by the spring force.

[0019] According to the invention, the automatic train coupling comprises a lubricating device with which lubricant can be supplied to at least one lubricated point in the coupling head, wherein the lubricating device has one or more lubricant channels in the coupling head.

[0020] According to the invention, at least one lubricant channel extends through the frog. The invention makes it particularly easy to guide the lubricant from the outside into the interior of the coupling head, since the frog extends in a disc-like manner comparatively far radially to the main pin. Thus, with the at least one lubricant channel running within the frog, a lubrication point for introducing lubricant can be positioned radially far outward. This lubrication point is easily accessible from outside the coupling head, in particular is positioned on one side of the coupling head. Starting from this lubrication point, the lubricant can be guided radially far inward in the frog to at least one lubricated point, for example on the main pin.

[0021] Preferably, the at least one lubricant channel in the core extends in a radial plane perpendicular to the main axis.

[0022] According to an advantageous embodiment of the invention, the coupling eye has a coupling eye bolt that is rotatably mounted around the coupling eye axis in the frog, with at least one lubricant channel in the frog opening into an interface between the coupling eye bolt and the frog. This interface can thus be lubricated with lubricant from the lubricant channel. A sliding movement occurs in this interface due to the relative rotation between the frog and the coupling eye bolt, so that lubrication in this interface reduces wear.

[0023] For example, in the interface between the coupling eye bolt and the frog, an annular channel is provided in the frog that is open to the coupling eye bolt, and at least one lubricant channel in the frog opens into the annular channel.

[0024] Additionally or alternatively, the interface between the

[0025] A radially outwardly open circumferential channel is provided in the coupling eye bolt and the frog in the coupling eye bolt, into which the at least one lubricant channel provided in the frog opens.

[0026] Both measures create a lubricant space in the circumferential direction around the coupling eye bolt to absorb lubricant from the lubricant channel so that the lubricant is safely distributed over the entire circumference of the coupling eye bolt.

[0027] Preferably, the at least one lubricant channel in the frog opens on a radially outer circumference of the frog into a lubrication point for introducing the lubricant into the lubricant channel provided in the frog.

[0028] The coupling head typically extends along a longitudinal axis. The invention allows the lubrication point to be positioned laterally on the coupling head, preferably in the coupled position of the frog.

[0029] A grease nipple is preferably arranged in the lubrication point so that a service worker can use this grease nipple to press lubricant into the lubricant channel provided in the core.

[0030] Particularly preferably, the frog is mounted in a rotationally fixed manner on a main bolt extending along the main axis, and the at least one lubricant channel provided in the frog opens into the main bolt. This eliminates the need to introduce lubricant from below, from the track bed, into the main bolt via a lubrication point.

[0031] For example, a lubricant distribution channel is incorporated into the main pin, which extends at least substantially or entirely along the main axis or parallel to the main axis and opens into one or more bearing points of the main pin via one or more radial bores. The main pin, together with the center piece, is mounted in this one or more bearing points so that it can rotate about the main axis. The at least one lubricant channel provided in the center piece then preferably opens into the lubricant distribution channel.

[0032] If both the coupling eye bolt and the main bolt are supplied with lubricant from the at least one lubricant channel provided in the frog, the lubricant can be directed first to the main bolt and then to the coupling eye bolt, or first to the coupling eye bolt and then to the main bolt, or via a distribution point parallel to the coupling eye bolt and main bolt.

[0033] According to one embodiment of the invention, it is also possible to supply only the main bolt or only the coupling eye bolt with lubricant from the lubricant channel provided in the frog and to supply the other bolt separately with lubricant via an additional lubrication point.

[0034] If, for example, the coupling eye bolt is supplied with lubricant via the at least one lubricant channel provided in the frog and the main bolt is supplied with lubricant separately, i.e. the bearing point(s) of the main bolt are supplied with lubricant separately, then, for example, a grease nipple can be provided at the bottom and / or top of the main bolt and / or a lubricant supply is carried out from the front through the funnel in the uncoupled state, in a corresponding embodiment of the train coupling.

[0035] According to one embodiment of the invention, two separate lubrication points, separated from each other by lubricant flow, are provided in the center piece to supply lubricant to the at least one bearing point of the main pin and the bearing point of the coupling eye pin, i.e., the interface between the center piece and the coupling eye pin, for introducing lubricant to the respective pin. Each lubrication point can, for example, have a grease nipple. According to an alternative embodiment, at least one common lubrication point is provided for introducing lubricant to both pins, preferably with a grease nipple.

[0036] The invention enables improved accessibility to the lubrication point(s), even when the traction coupling is coupled. Furthermore, the inclusion of at least one lubricant channel in the frog reduces or eliminates the need for external lubricant lines or lubricant channels, for example, in the coupling head housing.

[0037] The coupling head preferably has a manual uncoupling mechanism. The manual uncoupling mechanism comprises, for example, a cable pull or another gear mechanism with at least one chain, a rod, or a lever system.

[0038] In particular, the uncoupling movement is transmitted via a cable to a uncoupling lever, which causes the corresponding frog to rotate. The manual uncoupling preferably engages the main bolt to rotate it.

[0039] The automatic train coupling according to the invention can, for example, be installed in a rail vehicle which in particular comprises a plurality of carriages - railcars and / or passenger carriages / freight carriages - which are each coupled by means of an automatic train coupling according to the invention, wherein each automatic train coupling has two corresponding coupling heads, of which the pivot of one (passively operated) coupling lock is effected indirectly via the rotation of the pivot of the other (actively operated) coupling lock, in that this rotation is transmitted via the coupling eye.

[0040] The invention will be described below using exemplary embodiments and the figures.

[0041] Figure 1 shows a sectional view of an automatic train coupling according to the invention;

[0042] Figure 2 is a schematic representation of a train coupling according to the invention with two coupling heads coupled together;

[0043] Figure 3 shows an oblique view from the rear and an oblique view from the front of a coupling head of a train coupling according to the invention;

[0044] Figure 4 is a schematic representation of two coupling heads of an automatic train coupling in the coupled position;

[0045] Figure 5 shows the coupling heads from Figure 4 in the uncoupled position;

[0046] Figure 6 is a schematic view of two coupling heads in the

[0047] Transfer of the rotary movement from the core of the actively operated dome closure to the core of the passively operated dome closure;

[0048] Figure 7 shows a possible position of the ratchet rod of the passively operated coupling lock during uncoupling;

[0049] Figure 8 shows an advantageous position of the latch rod of the passively operated coupling lock during uncoupling compared to Figure 7;

[0050] Figure 9 shows an embodiment of a traction coupling according to the invention with a lubricant channel in the center piece for lubricating the coupling eye bolt; Figure 10 shows an embodiment of the invention with a lubricant channel in the center piece for lubricating the coupling eye bolt and the bearing points of the main bolt;

[0051] Figure 11 shows the embodiment from Figure 10 in an axial section through the main bolt;

[0052] Figure 12 shows a lubrication point according to the invention radially outside in the frog on the side of the coupling head.

[0053] Figure 1 schematically shows an embodiment of an automatic train coupling according to the invention in a coupling-ready position of the coupling lock 3 or its frog 6. In detail, the automatic train coupling has a coupling head 1, which comprises a coupling head housing 2 and the coupling lock 3. The coupling lock 3 is designed as a rotary lock, with the frog 6, to which a coupling eye 5 is connected so as to be rotatable about a coupling eye axis 8. The frog 6, in turn, is rotatable about the main axis 7. For this purpose, the frog 6 is mounted on a main bolt 19 and connected to it in a rotationally fixed manner.

[0054] As shown in Figures 1 to 3, a manual uncoupling mechanism 4 can engage the main pin 19 to manually uncouple the coupling lock 3. On the other hand, an actuator 20 of a valve (not shown in detail here) of a compressed air line, in particular a brake air line HL, can be controlled via the main pin 19, so that when the coupling lock 3 is turned into the coupled position, the valve is opened, and when the coupling lock 3 is turned into the uncoupled position or ready-to-couple position, the valve is closed.

[0055] The coupling eye 5 has a first end 5.1, at which it is rotatably connected to the frog 6, and an opposite second end 5.2, which can be clamped into a mouth 9 of the frog 6 of an oppositely arranged coupling head 1 in order to mechanically lock the two coupling heads 1 together, as shown, for example, in Figures 2 and 4. Accordingly, the coupling eye 5 has a crossbar at its second end 5.2, not shown in detail here.

[0056] The core 6 of each coupling head 1 can be rotated against the force of a spring accumulator 10, which is formed, for example, by one or more tension springs, see Figures 2 and 6, from the uncoupled position (Figure 5) into the coupled position (Figure 4) or the position ready for coupling (Figure 1).

[0057] Each coupling head 1 has a plunger 11 that is displaceable in the coupling direction of the train coupling, i.e., the direction of the longitudinal axes of the coupling heads 1, and that can be moved linearly in a guide 15 between a first position and a second position. The plunger 11 cooperates with a ratchet rod 12, which is pivotally connected to the frog 6 at one axial end and, as can be seen from Figure 8, passes through an opening 13 in the plunger 11. Furthermore, the ratchet rod 12 has a locking projection 16 in the region of the opening 13, which can be engaged with a locking projection 17 to prevent the ratchet rod 12 from moving in the direction from its second end to its first end connected to the frog 6, and thus a corresponding rotation of the frog 6.In the embodiment shown, the locking projection 17 is provided on the guide 15, which forms a counter bearing 14 for establishing a locking connection with the latch rod 12.

[0058] An elastic spring element 18 engages the latch bar 12, causing the two locking projections 16, 17 to engage, whereas the plunger 11, when moved from a first position to a second position, releases the latch bar 12 from the locking connection with the counterbearing 14 against the force of the spring element 18. Thus, in the second position of the plunger 11, the core 6 can be rotated by the force of the spring accumulator 10, whereas this rotation is blocked in the locking position of the latch bar 12.

[0059] Each coupling head 1 has a profile with a cone 21 and a funnel 22 on its free end face. The cone 21 and the funnel 22 are enclosed by a flat end face 23. In the illustrated embodiment, the profile or the end face 23 is formed by an end plate 24, which can be integral with the coupling head housing 2 or can be connected to it separately.

[0060] Figure 1 shows the coupling-ready position of the coupling head 1 or the coupling lock 3. If two coupling heads 1 are moved towards each other in this position, the cones 21 dip into the funnels 22 and press on the front of the stamps 11, so that the stamps 11 are moved from their first position to their second position and release the locking connections of the pawl rods 12 with the counter bearings 14. The second ends 5.2 of the coupling eyes 5 are pushed into the mouths 9 of the frogs 6 and the frogs 6, which are no longer blocked by the pawl rods 12, rotate due to the force of the spring accumulators 10 from the coupling-ready position shown in Figure 1 into the coupled position shown in Figure 4, in which the frogs 6 strike in particular against the coupling head housings 2.The coupling eyes 8 guided in the funnels 22 engage in the frog mouths 9 and the two coupling closures 3 are hooked into each other.

[0061] The dome closures 3 are loaded exclusively by tensile forces, whereas the compressive forces are transmitted via the end faces 23.

[0062] To uncouple the coupling heads 1, an automated uncoupling device or the manual uncoupling 4 rotates the frog 6 of the actively operated coupling lock 3 against the force of the spring-loaded mechanism 10. The coupling eye 5 of the actively operated coupling lock 3 transfers the rotary movement of the frog 6 via the mouth 9 to the frog 6 of the passively operated coupling lock 3, so that this too is rotated against the force of the spring-loaded mechanism 10. Alternatively or additionally, the frog 6 of the actively operated coupling lock 3 can transfer the rotary movement to the coupling eye 5 of the passively operated coupling lock 3, so that the frog 6 of the passively operated coupling lock 3 is also rotated.

[0063] When the rotation of the frog pieces 6 in the direction of the uncoupled positions shown in Figure 5 has progressed far enough, the coupling eyes 5 slide on the mouths 9 of the frog pieces 6 and the ratchet rods 12 are brought into their locking position, in which, when the pistons 11 are moved into their first position when the coupling heads 1 are moved apart, the locking connection between the ratchet rods 12 and the counter bearings 14 can be established, i.e. the two locking projections 16, 17 hook into one another in a form-fitting manner.

[0064] In the embodiment shown in Figure 7, the locking position is selected such that the latching rod 12 of the passively operated dome lock 3 has not yet reached it when the frog 6 of the passively operated dome lock 3 has not been rotated far enough into the uncoupled position, so that the frog 6 has already been rotated back towards the coupled position before the locking connection between the latching rod 12 and the counterbearing 14 or between the two locking projections 16, 17 has yet to be established. In a preferable solution, however, as shown, for example, in Figure 8, the locking position of the latching rod 12 is already reached when the frog 6 has not yet been rotated by the maximum possible angle towards the uncoupled position.

[0065] This ensures that the ratchet rod 12 engages securely in the counter bearing 14 even if the frog 6 does not rotate to its maximum from the coupled to the uncoupled position.

[0066] Because the locking position of the ratchet rod 12 is reliably reached, the coupling-ready position shown in Figure 1 is also always securely maintained.

[0067] Figure 6 shows again how the frog 6 of the actively operated dome lock 3 transmits its rotational movement via the coupling eyelet 5 of the passively operated dome lock 3 to the frog 6 of the passively operated dome lock 3. It is also shown that the rotation of the two frogs 6 does not have to be completely synchronous, but that the frog 6 of the passively operated dome lock 3 lags slightly behind the rotational movement of the frog 6 of the actively operated dome lock 3. Accordingly, the latch rod 12 of the actively operated dome lock 3 (shown on the right in Figure 6) is displaced further with its locking projection 16 over the locking projection 17 than the latch rod 12 of the passively operated dome lock 3 (shown on the left in Figure 6).

[0068] However, this comparatively reduced rotational movement of the frog 6 of the passively operated dome lock 3 can be sufficient to move the latching rod 12 of the passively operated dome lock 3 into its locking position.

[0069] Figure 1 schematically shows a lubrication point 29 with a lubrication nipple 31 of a lubrication device 25 according to the invention, which will be explained in more detail below.

[0070] Figure 9 shows a possible embodiment according to the invention with a lubricating device 25, with which lubricant is guided via a lubricant channel 26.1 to a lubricated point in the coupling head 1, here to an interface between the frog 6 and a coupling eye bolt 27. The lubricant channel 26.1 running in the frog 6 opens at one end into a lubrication point 29 for introducing lubricant into the lubricant channel 26.1, wherein, for example, a grease nipple 31 is arranged in the lubrication point 29. The other end of the lubricant channel 26.1 opens into the interface between the coupling eye bolt 27 and the frog 6, specifically into an annular channel 28 in the frog 6 that is open towards the coupling eye bolt 27. Additionally or alternatively, as is only indicated schematically, a radially outwardly open circumferential channel 32 can also be introduced into the coupling eye bolt 27 in order to drain the lubricant from the lubricant channel 26.1 over the circumference of the coupling eye bolt 27. In the embodiment according to Figure 9, only the coupling eye bolt 27 is lubricated via the lubrication point 29 and the lubricant channel 26.1.

[0071] Figure 10 shows a further development of the invention in which, starting from the coupling eye bolt 27 or the interface between the coupling eye bolt 27 at the first end 5.1 of the coupling eye 5 and the frog 6, a further lubricant channel 26.2 is provided in the frog, which opens into the main bolt 19. As can be seen from Figure 11, the further lubricant channel 26.2 in the main bolt 19 opens into a lubricant distribution channel 33, which extends along or parallel to the main axis 7 and opens here via radial bores 34 into two bearing points 35 of the main bolt 19 in the coupling head housing 2.

[0072] Figure 12 again shows that the lubrication point 29 with the lubrication nipple 31 is positioned laterally on the coupling head 1 in the coupled position of the frog 6, which extends along the longitudinal axis 30, as can also be seen in the previously described figures.

[0073] 1 coupling head

[0074] 2 coupling head housings

[0075] 3 dome closure

[0076] 4 Manual uncoupling

[0077] 5 coupling eyelet

[0078] 5.1 first end

[0079] 5.2 second end

[0080] 6 Heart

[0081] 7 Main axis

[0082] 8 coupling eye axle

[0083] 9 mouths

[0084] 10 spring accumulators

[0085] 1 1 stamp

[0086] 12 latch rod

[0087] 13 Opening

[0088] 14 Counter bearings

[0089] 15 Guide

[0090] 16 locking projection

[0091] 17 locking projection

[0092] 18 elastic spring element

[0093] 19 main bolts

[0094] 20 Actuator

[0095] 21 pins

[0096] 22 funnels

[0097] 23 Frontal surface

[0098] 24 Front plate

[0099] 25 lubricants in the direction

[0100] 26.1 Lubricant channel

[0101] 26.2 Lubricant channel 27 Coupling eye bolt

[0102] 28 Ring Canal

[0103] 29 Lubrication point

[0104] 30 Longitudinal axis 31 Grease nipple

[0105] 32 circumferential channel

[0106] 33 Lubricant distribution channel

[0107] 34 Radial bore

[0108] 35 storage location

Claims

Patent claims 1 . Automatic train coupling, in particular for a freight wagon of a rail vehicle, with a coupling head (1) which comprises a coupling head housing (2) and a coupling lock (3) with a locking device, wherein the coupling lock (3) is designed as a rotary lock with a coupling eye (5) and a frog (6), wherein the frog (6) is rotatable about a main axis (7) between a position ready for coupling, a coupled position and an uncoupled position, the coupling eye (5) is connected to the frog (6) with a first end (5.1) so as to be rotatable about a coupling eye axis (8) and has a second free end (5.2); and the frog (6) has a mouth (9) which is designed to receive a second end (5.2) a coupling eyelet (5) of an oppositely arranged coupling head (1), and the frog (6) can be rotated against the force of a spring accumulator (10) from the coupled position into the uncoupled position and by the force of the spring accumulator (10) from the uncoupled position into the coupled position; with a lubricating device (25) with which lubricant can be supplied to at least one lubricated point in the coupling head (1), wherein the lubricating device (25) has one or more lubricant channels (26.1, 26.2) in the coupling head (1); characterized in that at least one lubricant channel (26.1, 26.2) extends through the frog (6).

2. Automatic train coupling according to claim 1, characterized in that the at least one lubricant channel (26.1, 26.2) in the frog (6) extends in a radial plane perpendicular to the main axis (7).

3. Automatic train coupling according to one of claims 1 or 2, characterized in that the coupling eye (5) has a coupling eye bolt (27) which is rotatably mounted about the coupling eye axis (8) in the frog, wherein the at least one lubricant channel (26.1, 26.2) in the frog (6) opens into an interface between the coupling eye bolt (27) and the frog (6).

4. Automatic train coupling according to claim 3, characterized in that in the interface between the coupling eye bolt (27) and the frog (6) an annular channel (28) open to the coupling eye bolt (27) is provided in the frog (6) and the at least one lubricant channel (26.1, 26.2) opens into the annular channel (28).

5. Automatic train coupling according to claim 3 or 4, characterized in that in the interface between the coupling eye bolt (27) and the frog (6) in the coupling eye bolt (27) a radially outwardly open circumferential channel (32) is introduced, in which the at least one lubricant channel (26.1, 26.2) opens into the frog (6).

6. Automatic train coupling according to one of claims 1 to 5, characterized in that the at least one lubricant channel (26.1) in the frog (6) opens on a radially outer circumference of the frog (6) into a lubrication point (29) for introducing lubricant into the lubricant channel (26.1) in the frog (6).

7. Automatic train coupling according to claim 6, characterized in that the coupling head (1) extends along a longitudinal axis (30) and the lubrication point (29) is positioned laterally on the coupling head (1) in the coupled position of the frog (6).

8. Automatic train coupling according to one of claims 1 to 7, characterized in that a grease nipple (31) is arranged in the lubrication point (29).

9. Automatic train coupling according to one of claims 1 to 8, characterized in that the frog (6) is mounted in a rotationally fixed manner on a main bolt (19) which extends along the main axis (7), and the at least one lubricant channel (26.2) in the frog (6) opens into the main bolt (19).

10. Automatic train coupling according to claim 9, characterized in that a lubricant distribution channel (33) is introduced into the main bolt (19), which extends at least substantially along the main axis (7) or parallel to the main axis (7) and opens via one or more radial bores (34) into one or more bearing points (35) of the main bolt (19), with which the main bolt (19) is mounted together with the frog (6) so as to be rotatable about the main axis (7), and the at least one lubricant channel (26.2) in the frog (6) opens into the lubricant distribution channel (33).

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