Attachment for a self-propelled working machine, vehicle recovery system, and method for towing a vehicle

Abstract

The invention relates to an attachment (5) for a self-propelled working machine (2), in particular a telescopic loader, the attachment (5) comprising: - a coupling frame (8), wherein the coupling frame (8) is designed for detachable coupling to the interchangeable receptacle (4) of the self-propelled working machine (2); - a holding arm (9) which is arranged on the coupling frame (8); a spectacle lift (10) which is pivotally accommodated on the holding arm (9), wherein the spectacle lift (10) has a first wheel receptacle (12) and a second wheel receptacle (13) for receiving the two front wheels (25) or the two rear wheels (26) of a vehicle (24) to be towed.

Description

[0001] ATTACHMENT FOR A SELF-PROPELLED WORK MACHINE, AS WELL AS A VEHICLE RECOVERY SYSTEM, AS WELL AS A METHOD FOR TOWING A VEHICLE

[0002] The invention relates to an attachment for a self-propelled work machine, as well as a vehicle recovery system and a method for towing a vehicle.

[0003] DE102017110831B4 discloses a towing device. Such a towing device is typically attached to the rear of special towing vehicles intended for towing and recovering vehicles. The towing device comprises a telescopically extendable boom and a pivoting frame in which two front wheels or two rear wheels of a vehicle to be towed can be accommodated. Such a frame is generally referred to as a towing frame. The towing frame comprises a support and L-shaped pivot arms and is coupled to the boom by means of a joint. To tow a vehicle, the towing frame must first be placed under the front or rear wheels of the vehicle to be towed. For this purpose, the pivot arms are first folded into an inward position PI.The towing vehicle then approaches the vehicle to be towed with the frame lowered near the ground and the pivot arms folded into the PI position and guides the carrier to the front or rear wheels of the vehicle to be towed. When both front or rear wheels contact the carrier 24, the pivot arms are folded from the PI position to the P2 position so that the carrier and pivot arms grip the wheels of the vehicle to be towed from the front and rear. The pivot arms are preferably folded in and out hydraulically, with the operator triggering a corresponding control command using a control device. In the next step, the frame is hydraulically raised using a further control command so that the wheels accommodated in the frame lose contact with the ground and the towing vehicle can tow the vehicle to be towed.

[0004] The towing device and towing method known from DE102017110831B4 have the disadvantage that a vehicle cannot be towed from narrow parking garages, since the overall system consisting of the towing vehicle with the attached towing device and the towed vehicle requires too much space, has too large a turning circle, and is too inflexible. The object of the present invention was to overcome the disadvantages of the prior art and to provide an attachment for a self-propelled work machine, as well as a vehicle recovery system and a method for towing a vehicle, by means of which the vehicle to be towed can also be towed from cramped parking garages.

[0005] In addition, the vehicle recovery system should be cost-effective and space-saving in storage, so that it can be used, for example, in company parking garages to be quickly available for the recovery of burning vehicles, especially electric vehicles.

[0006] This object is achieved by a device and a method according to the claims.

[0007] According to the invention, an attachment is designed for a self-propelled work machine. In particular, the self-propelled work machine can be a telescopic loader. The attachment comprises:

[0008] - a coupling frame, wherein the coupling frame is designed for detachable coupling to the interchangeable holder of the self-propelled work machine;

[0009] - a holding arm which is arranged on the coupling frame;

[0010] - a lifting frame which is pivotally mounted on the support arm, wherein the lifting frame has a first wheel mount and a second wheel mount for receiving the two front wheels or the two rear wheels of a vehicle to be towed.

[0011] The attachment according to the invention offers the advantage that it can be easily coupled to the self-propelled work machine to enable vehicles to be towed by the self-propelled work machine. In particular, a telehandler can be used, which, due to its maneuverability, is particularly well-suited for towing vehicles in confined spaces. Thus, the attachment can be well-suited for towing vehicles from parking garages. In particular, the attachment can be used to tow vehicles that have caught fire in parking garages or in confined spaces. These can be, for example, electric vehicles.

[0012] Furthermore, it may be expedient for the coupling frame to have an upper coupling mount designed for positive engagement by an upper mount system of the interchangeable mount, and for the coupling frame to have a lower coupling mount designed for locking with a locking mechanism of the interchangeable mount. This offers the advantage that the attachment can be easily and quickly coupled to the self-propelled work machine. This makes it possible for the self-propelled work machine to be used for other activities in daily work requirements and, for example, for the attachment to be quickly and easily attached to the self-propelled work machine in the event of a vehicle fire.

[0013] Furthermore, it can be provided that the lower coupling receptacle has a first tab with a first bore and a second tab with a second bore, wherein the first bore serves to receive a first locking pin of the locking mechanism and the second bore serves to receive a second locking pin of the locking mechanism. In particular, a coupling receptacle designed in this way can enable simple and rapid coupling of the attachment to the self-propelled work machine. In particular, it can be provided that the first locking pin and the second locking pin are hydraulically actuated in order to achieve automated locking of the attachment to the self-propelled work machine.

[0014] Furthermore, the coupling frame can be provided with a lower cross-section and an upper cross-section, with the lower cross-section and the upper cross-section being coupled to each other by means of uprights, and the support arm being rigidly coupled to the lower cross-section. This offers the advantage that the attachment can be securely coupled to the self-propelled work machine, enabling easy and safe removal of the vehicle being towed.

[0015] Another advantageous embodiment is one in which a pivoting cylinder can be provided, wherein the lifting bracket can be actively pivoted relative to the holding arm by means of the pivoting cylinder. This has the advantage that the vehicle to be towed can be actively pivoted by means of the pivoting cylinder, in order to be able to tow it more easily from cramped parking garages. To enable active pivoting, it may be necessary for those wheels of the vehicle to be towed that are not mounted on the lifting bracket to be freely movable with the aid of maneuvering rollers. In a first embodiment, it can be provided that the pivoting cylinder is coupled to the holding arm by means of a first pivoting mount and is coupled to the lifting bracket by means of a second pivoting mount, wherein the lifting bracket can be actively pivoted relative to the holding arm by means of the pivoting cylinder.

[0016] In a second embodiment, it can be provided that the swivel cylinder is coupled to the coupling frame by means of a first swivel mount and is coupled to the lifting frame by means of a second swivel mount, wherein the lifting frame can be actively swiveled to the holding arm by means of the swivel cylinder.

[0017] In a third embodiment, the holding arm can be short and a lifting spectacle arm can be formed, which is rigidly coupled to the lifting spectacle wearer, wherein the lifting spectacle arm is pivotally coupled to the holding arm. In particular, the pivot cylinder can be coupled to the coupling frame by means of a first pivot mount and to the lifting spectacle by means of a second pivot mount. In particular, the lifting spectacle can encompass the lifting spectacle arm.

[0018] Furthermore, it can be provided that an angle sensor is formed which serves to detect the angular position of the lifting glasses in relation to the holding arm.

[0019] According to a further development, it is possible to provide an extinguishing agent tank and extinguishing agent nozzles that are fluidly connected to the extinguishing agent tank. This offers the advantage that the vehicle being towed can be cooled simultaneously using the attachment, thus increasing safety during removal of the towed vehicle. In particular, the extinguishing agent tank can be designed to hold extinguishing water. Furthermore, it can also be expedient for the extinguishing agent tank to hold extinguishing foam.

[0020] In a preferred embodiment, the extinguishing agent tank can be arranged on the coupling frame. Furthermore, the extinguishing agent nozzles can be arranged on the lifting frame. Furthermore, the invention relates to a vehicle recovery system. The vehicle recovery system comprises:

[0021] - a self-propelled work machine, in particular a telescopic loader, with a left front wheel and a right front wheel and with a left rear wheel and a right rear wheel, wherein the self-propelled work machine has a lifting arm on which an interchangeable holder for releasably receiving an attachment is formed, wherein the front wheels and the rear wheels of the self-propelled work machine are steerable;

[0022] - an attachment which is designed according to one of the preceding claims, wherein the coupling frame of the attachment is coupled to the interchangeable holder of the self-propelled work machine.

[0023] The vehicle recovery system according to the invention has the advantage that vehicles can be towed using the self-propelled work machine.

[0024] Furthermore, the vehicle recovery system can be provided with a first shunting roller and a second shunting roller, each of which has a base frame and four shunting roller wheels arranged on the base frame, each of which is rotatable about a vertical axis of rotation relative to the base frame. This has the advantage that the vehicle to be towed can be actively pivoted using the pivot cylinder, making it easier to tow from confined parking garages. To enable active pivoting, it may be necessary for those wheels of the vehicle to be towed that are not mounted on the lifting frame to be freely movable with the aid of the shunting rollers.

[0025] Furthermore, it may be expedient for the interchangeable attachment to have a quick-change system, with the coupling frame of the attachment being hydraulically lockable. A coupling attachment designed in this way, in particular, can enable simple and quick coupling of the attachment to the self-propelled machine. In particular, the first locking pin and the second locking pin can be hydraulically actuated to achieve automated locking of the attachment to the self-propelled machine.

[0026] Furthermore, the lifting arm can be provided with a telescopic design. This has the advantage of increasing the flexibility of the vehicle recovery system, as the distance between the lifting frame and the self-propelled work machine can be increased. In particular, this can also increase safety, as, for example, in the event of a fire in a towed vehicle, the distance between the self-propelled work machine and the towed vehicle can be increased. Furthermore, this measure can influence the trailing radius of the towed vehicle.

[0027] Furthermore, the vehicle recovery system can further comprise a digital computer, a camera system, and a display. The display is configured to display an image captured by the camera system. The digital computer is programmed to superimpose an overlay of the lane onto the image captured by the camera system. The overlay of the lane is calculated using data from sensors for detecting the angular position of the front wheels of the self-propelled work machine, the angular position of the rear wheels of the self-propelled work machine, and the angular position of the lifting frame relative to the support arm. This has the advantage that this measure can improve the operability of the vehicle recovery system.

[0028] Another advantageous feature is a design in which the camera system can be provided with a thermal imaging camera. This offers the advantage that the vehicle recovery system can be operated or moved even if, for example, excessive smoke development in the event of a fire makes driving by sight impossible. In addition, this measure allows the temperature development of the vehicle being towed to be monitored.

[0029] Furthermore, the invention relates to a method for towing a vehicle. The method comprises the following steps:

[0030] - Provision of a vehicle recovery system comprising:

[0031] + a self-propelled work machine, in particular a telescopic loader, with a left front wheel and a right front wheel and with a left rear wheel and a right rear wheel, wherein the self-propelled work machine has a lifting arm on which an interchangeable holder for releasably receiving an attachment is formed, wherein the front wheels and the rear wheels of the self-propelled work machine are steerable;

[0032] + an attachment comprising

[0033] ++ a coupling frame, wherein the coupling frame is designed for detachable coupling with the interchangeable holder of the self-propelled work machine,

[0034] ++ a holding arm which is arranged on the coupling frame, ++ a lifting frame which is pivotally received on the holding arm, wherein the lifting frame has a first wheel holder and a second wheel holder for receiving the two front wheels or the two rear wheels of a vehicle to be towed, wherein the coupling frame of the attachment is coupled to the interchangeable holder of the self-propelled work machine;

[0035] - Picking up the two front wheels or the two rear wheels of the vehicle to be towed on the first wheel support and the second wheel support;

[0036] - Moving the vehicle to be towed using the vehicle recovery system.

[0037] The method according to the invention has the advantage that the vehicle to be towed can also be towed from confined spaces.

[0038] Furthermore, it may be expedient for those wheels of the towed vehicle that are not supported by the first wheel mount and the second wheel mount of the lifting frame to be supported by a first shunting roller and a second shunting roller, and for the towed vehicle to be pivoted relative to the coupling frame by actively pivoting the lifting frame using the pivoting cylinder. This offers the advantage that the towed vehicle can be actively pivoted using the pivoting cylinder, making it easier to tow from confined parking garages.

[0039] Furthermore, it can be provided that in a first mode the active pivoting of the lifting frame relative to the coupling frame by means of the pivot cylinder takes place through an input via an input means independent of the steering system, and that in a second mode the active pivoting of the lifting frame relative to the coupling frame by means of the pivot cylinder is coupled to the steering system and does not require a separate input. This has the advantage that, for example, simplified maneuverability can be achieved when the vehicle to be towed is being pulled out of a parking space. At the same time, the operability of the vehicle recovery system can be improved during subsequent driving on driveways, as the driver only has to concentrate on steering. In particular, it can be provided that a driver can actively switch between the first mode and the second mode.

[0040] Furthermore, it may be useful to display an overlay of the lane on a display, which is calculated by a digital computer based on the angular position of the front wheels of the self-propelled machine, the angular position of the rear wheels of the self-propelled machine, and the angular position of the lifting frame relative to the support arm. This has the advantage of improving the operability of the vehicle recovery system.

[0041] Furthermore, it can be provided that when cornering left, the front wheels of the self-propelled machine are turned to the left and the rear wheels of the self-propelled machine are turned to the right, and the lifting frame is pivoted to the left relative to the coupling frame. When cornering right, the front wheels of the self-propelled machine are turned to the right and the rear wheels of the self-propelled machine are turned to the left, and the lifting frame is pivoted to the right relative to the coupling frame. This has the advantage that tight curve radii can be achieved and the vehicle being towed does not swerve too far, making maneuvering easier in confined spaces.

[0042] Furthermore, the digital computer and camera system can be used to calculate a target angular position of the lifting frame relative to the support arm, and the actual angular position of the lifting frame relative to the support arm is automatically adjusted depending on the angular position of the front and rear wheels of the self-propelled machine. This has the advantage that the driver of the self-propelled machine does not have to actively swivel the lifting frame. This allows them to concentrate solely on steering the self-propelled machine.

[0043] Furthermore, the digital computer and camera system can also be used to automatically control the movement of the self-propelled machine. This has the advantage that a machine operator sitting on the self-propelled machine is no longer required. This measure therefore allows the vehicle to be towed, for example, from a smoky and potentially hazardous environment.

[0044] In an alternative design variant, the movement of the self-propelled machine can also be controlled by a remote control. This allows a machine operator to influence the control of the self-propelled machine without having to be in the immediate vicinity of the machine. The surroundings can be recorded, for example, using the camera system.

[0045] In a first embodiment, the front and rear wheels of the self-propelled work machine can be steered by having a base frame, and the front and rear wheels can be pivoted independently of each other relative to the base frame in pairs. This makes it possible, for example, for the self-propelled work machine to negotiate a tight curve radius or to operate the self-propelled work machine in a circular motion.

[0046] In an alternative design variant, it is also conceivable that the self-propelled work machine is designed as an articulated steering vehicle, whereby the front wheels and the rear wheels can be steered by the articulated steering.

[0047] In addition, it can be provided that the angular position of the lifting frame to the holding arm is detected by detecting the position of the shunting rollers relative to the coupling frame or relative to the holding arm or relative to the interchangeable holder of the self-propelled work machine. This can be achieved, for example, by installing a position detection system in the shunting roller, by means of which the relative position to a reference transmitter in the coupling frame or in the holding arm or in the interchangeable holder of the self-propelled work machine or at another location on the self-propelled work machine is detected. Of course, it is also conceivable for absolute position sensors to be installed in the shunting rollers and in the coupling frame or in the holding arm or in the interchangeable holder of the self-propelled work machine or at another location on the self-propelled work machine.This measure allows the vehicle being towed to be taken into account in the lane display, and also facilitates autonomous adjustment of the angle of the lifting frame relative to the lifting arm. In particular, the geometry of the vehicle being towed can be taken into account.

[0048] Alternatively, the angle position of the lifting glasses relative to the holding arm can be directly detected using an angle sensor.

[0049] Furthermore, it can be provided that the lifting arm of the self-propelled machine is telescoped out, and the interchangeable support is moved away from a chassis of the self-propelled machine in order to influence the track of a trailing vehicle to be towed that is not mounted on shunting rollers. This measure can be used to influence the distance between the lifting arm pivot axis and the chassis of the self-propelled machine in order to influence the caster radius of the vehicle to be towed. The greater the distance between the lifting arm pivot axis and the chassis of the self-propelled machine, the greater the caster radius of the vehicle to be towed, which is raised on one axle and the wheels of the second axle are trailing.

[0050] For a better understanding of the invention, it is explained in more detail using the following figures.

[0051] They show in a highly simplified, schematic representation:

[0052] Fig. 1 shows a first embodiment of a vehicle recovery system in a plan view;

[0053] Fig. 2 shows a first embodiment of an attachment in a perspective view;

[0054] Fig. 3 shows a first embodiment of a shunting roller in a perspective view;

[0055] Fig. 4 shows a second embodiment of the attachment in a perspective view;

[0056] Fig. 5 shows the first embodiment of the attachment in two different positions in a plan view;

[0057] Fig. 6 shows a further embodiment of the attachment with a cylinder arranged on the coupling frame and lifting eyeglass carrier in two different positions in a plan view;

[0058] Fig. 7 shows a further embodiment of the attachment with a cylinder arranged on the coupling frame and lifting arm in two different positions in a plan view;

[0059] Fig. 8 shows a further embodiment of a vehicle recovery system in a top view; Fig. 9 shows a further embodiment of the attachment with two cylinders in two different positions in a top view.

[0060] By way of introduction, it should be noted that in the variously described embodiments, identical parts are provided with identical reference symbols or component designations. The disclosures contained throughout the description can be applied analogously to identical parts with identical reference symbols or component designations. Furthermore, the positional information chosen in the description, such as top, bottom, side, etc., refers to the directly described and illustrated figure, and these positional information must be applied analogously to the new position in the event of a change in position.

[0061] Fig. 1 shows a first embodiment of a vehicle recovery system 1 in a plan view.

[0062] As can be seen from Fig. 1, the vehicle recovery system 1 can comprise a self-propelled work machine 2. The self-propelled work machine 2 can have a lifting arm 3, on which a swap body 4 can be arranged. The swap body 4 can serve to accommodate an attachment 5.

[0063] In particular, it can be provided that the self-propelled work machine 2, as shown in Fig. 1, is designed as a telescopic loader. In this case, it can be provided that the lifting arm 3 is telescopically extendable, so that the distance of the interchangeable support 4 from a chassis 6 of the self-propelled work machine 2 can be varied.

[0064] Furthermore, it can be provided that the lifting arm 3 is pivotably mounted on the chassis 6 about a horizontal lifting arm pivot axis 7. Furthermore, an actuator (not shown) can be provided, which serves to raise the lifting arm 3. This can be, for example, a hydraulic cylinder.

[0065] Fig. 2 shows a perspective view of a first embodiment of the attachment 5 and a schematic view of the lifting arm 3 together with the interchangeable holder 4 arranged thereon. The further description is based on a synopsis of Figs. 1 and 2.

[0066] As can be seen particularly clearly in Fig. 2, the attachment 5 can be provided with a coupling frame 8. The coupling frame 8 can serve for detachably coupling the attachment 5 to the interchangeable holder 4 of the self-propelled work machine 2. Furthermore, the attachment 5 can be provided with a holding arm 9, which in the present embodiment can be rigidly coupled to the coupling frame 8. In particular, the holding arm 9 can be welded to the coupling frame 8.

[0067] Furthermore, it can be provided that the attachment 5 comprises a lifting bracket 10, which can be pivotably mounted on the support arm 9. In particular, it can be provided that the lifting bracket 10 is pivotably mounted on the support arm 9 about a lifting bracket pivot axis 11. Furthermore, it can be provided that the lifting bracket 10 has a first wheel mount 12 and a second wheel mount 13.

[0068] In particular, the lifting frame 10 may include a lifting frame support 14, on which the first wheel mount 12 and the second wheel mount 13 are arranged. The lifting frame support 14 may be designed in the form of a shaped tube.

[0069] In particular, it can be provided that the holding arm 9 is also designed in the form of a shaped tube. A receiving fork 15, in which the lifting spectacle carrier 14 can be arranged, can be arranged on the holding arm 9. In particular, it can be provided that a pivot pin 16 is formed, by means of which the lifting spectacle carrier 14 can be pivotally received about the lifting spectacle pivot axis 11 relative to the holding arm 9. Furthermore, it can be provided that a pivot bearing, in particular a plain bearing bush, is formed in the lifting spectacle carrier 14 for interacting with the pivot pin 16.

[0070] Furthermore, it can be provided that the attachment 5 comprises a pivot cylinder 17, by means of which the lifting frame 10 can be actively pivoted relative to the holding arm 9 about the lifting frame pivot axis 11. In particular, it can be provided that the pivot cylinder 17 is coupled to the holding arm 9 by means of a first pivot mount 18 and to the lifting frame 10 by means of a second pivot mount 19. In particular, it can be provided that the pivot cylinder 17 is coupled to the lifting frame support 14 of the lifting frame 10 by means of the second pivot mount 19. By means of the pivot cylinder 17, an angular position 20 of the lifting frame 10, in particular of the lifting frame support 14, relative to the holding arm 9 can be actively adjusted.

[0071] Furthermore, it can be provided that an angle sensor 21 is formed, which serves to detect the angular position 20 of the lifting frame 10 relative to the holding arm 9. As can also be seen from Fig. 2, it can be provided that the first wheel receptacle 12 has a first wheel carrier 22. Furthermore, it can be provided that the second wheel receptacle 13 has a second wheel carrier 23. The first wheel carrier 22 and the second wheel carrier 23 can be arranged parallel on the lifting frame carrier 14 in the ready-to-use state. In this case, either the front wheels 25 or the rear wheels 26 can rest on the first wheel carrier 22 and the lifting frame carrier 14 or on the second wheel carrier 23 and the lifting frame carrier 14.In other words, it can be provided that the first wheel receptacle 12 and the second wheel receptacle 13 serve to receive the front wheels 25 of the vehicle 24 to be towed or that the first wheel receptacle 12 and the second wheel receptacle 13 serve to receive the rear wheels 26 of the vehicle to be towed.

[0072] In particular, it can be provided that the first wheel carrier 22 and the second wheel carrier 23 are each pivotably mounted on the lifting frame carrier 14. Thus, to accommodate the vehicle 24 to be towed, the two wheel carriers 22, 23 can be pivoted out to allow the lifting frame 10 to be retracted beneath the vehicle 24 to be towed. The two wheel carriers 22, 23 can be manually pivotably coupled to the lifting frame carrier 14. Furthermore, it is also conceivable for the two wheel carriers 22, 23 to be pivotably mounted on the lifting frame carrier 14 by means of a common actuator or each by means of a separate actuator.

[0073] As further evident from Fig. 1, the self-propelled work machine 2 can be provided with a left front wheel 27 and a right front wheel 28. The two front wheels 27, 28 can be steerably coupled to the chassis 6, so that an angular position 29 of the front wheels 27, 28 relative to the chassis 6 can be adjusted.

[0074] As further evident from Fig. 1, the self-propelled work machine 2 can be provided with a left rear wheel 30 and a right rear wheel 31. The two rear wheels 30, 31 can be steerably coupled to the chassis 6, so that an angular position 32 of the rear wheels 30, 31 relative to the chassis 6 is adjustable.

[0075] In the illustration according to Fig. 1, the front wheels 27, 28 are turned as far inward as possible and the rear wheels 30, 31 are turned as far outward as possible. In this position, an inner radius 33 of the self-propelled work machine 2 and an outer radius 34 of the self-propelled work machine 2 can have a minimum value. In the present exemplary embodiment of a turning angle for negotiating a right-hand bend, the outer radius 34 of the self-propelled work machine 2 can be predetermined or limited by the left front wheel 27 and the left rear wheel 30. When the lifting arm 3 is retracted, the lifting arm 3 or the interchangeable holder 4 arranged thereon can be guided within the outer radius 34 of the self-propelled work machine 2. The inner radius 33 of the self-propelled work machine 2 can be specified or limited by the most protruding point on the chassis 6 approximately centrally between the front wheels 27, 28 and the rear wheels 30, 31.

[0076] As further evident from Fig. 1, an outer radius 35 of the entire vehicle combination 38 can be defined by the outermost point of an entire vehicle combination 38, in particular by the vehicle 24 to be towed or by a shunting roller 36, 37 arranged on the vehicle 24. The outer radius 35 of the entire vehicle combination 38 can be larger than the outer radius 34 of the self-propelled work machine 2.

[0077] As further evident from Fig. 1, a lane 39 can thus be delimited either by the inner radius 33 of the self-propelled work machine 2 and the outer radius 34 of the self-propelled work machine 2 if no vehicle 24 to be towed is being transported, or by the inner radius 33 of the self-propelled work machine 2 and the outer radius 35 of the overall vehicle combination 38. Furthermore, it is of course also conceivable that the vehicle 24 to be towed runs within the inner radius 33 of the self-propelled work machine 2, which has a corresponding influence on the lane.

[0078] In particular, it can be provided that the vehicle recovery system 1 comprises a digital computer 40 and a display 41. The lane 39 can be calculated by means of the digital computer 40. Furthermore, it can be provided that the lane 39 is displayed on the display 41. Furthermore, it can be provided that the vehicle recovery system 1 comprises a camera system 42, by means of which a camera image of the surroundings can be recorded and transmitted to the display 41. The lane 39 can be displayed as an overlay on the display 41.

[0079] As can also be seen from Fig. 1, with a constant angular position of the front wheels 27, 38 and the rear wheels 30, 31 of the self-propelled work machine 2, the outer radius 35 of the entire vehicle combination 38 can be influenced by pivoting the lifting frame 10 and thus the vehicle 24 to be towed. To enable free pivoting of the vehicle 24 to be towed, those wheels of the vehicle 24 to be towed that are not mounted on the lifting frame 10 can be mounted on the first shunting roller 36 and the second shunting roller 37, wherein the shunting rollers 36, 37 can be designed to be displaceable in all directions.

[0080] A precise design of the shunting rollers 36, 37 will be described in more detail below with reference to Fig. 3.

[0081] In the present embodiment according to Fig. 1, for example, the front wheels 25 of the vehicle 24 to be towed are mounted on the lifting frame 10. The maneuvering rollers 36, 37 are positioned beneath the rear wheels 26 of the vehicle 24 to be towed. By steering the front wheels 27, 28 of the self-propelled work machine 2 or the rear wheels 30, 31 of the self-propelled work machine 2 and by pivoting the lifting frame 10 relative to the support arm 9, or optionally by extending the lifting arm 3, the vehicle 24 to be towed can be maneuvered out of confined spaces.

[0082] As further evident from Fig. 2, it can be provided that the interchangeable holder 4 of the self-propelled work machine 2 has a quick-change system 43, by means of which the coupling frame 8 of the attachment 5 can be easily exchanged. In particular, it can be provided that the coupling frame 8 of the attachment 5 can be hydraulically locked to the interchangeable holder 4 by means of the quick-change system 43.

[0083] In particular, it can be provided that the coupling frame 8 has an upper coupling receptacle 44, which is designed for positive reception by an upper receiving system 45 of the interchangeable receptacle 4. Furthermore, it can be provided that the coupling frame 8 has a lower coupling receptacle 46, which is designed for locking with a locking mechanism 47 of the interchangeable receptacle 4.

[0084] Furthermore, it can be provided that the lower coupling receptacle 46 has a first tab 48 with a first bore 49. The first bore 49 can serve to receive a first locking bolt 50 of the locking mechanism 47. Furthermore, it can be provided that the lower coupling receptacle 46 has a second tab 51 with a second bore 52. The second bore 52 can serve to receive a second locking bolt 53 of the locking mechanism 47. Furthermore, it can be provided that the upper coupling receptacle 44 has a first hook 54 and a second hook 55. The hooks 54, 55 can serve to be received in the upper receptacle system 45 of the interchangeable receptacle 4. In particular, it can be provided that the upper receptacle system 45 of the interchangeable receptacle 4 has a hooking profile 56 for hooking in the first hook 54 and the second hook 55. The hooking profile 56 can be formed, for example, by a rod or a shaped tube.

[0085] Furthermore, the coupling frame 8 can be provided with a lower cross-section 57 and an upper cross-section 58. The lower cross-section 57 and the upper cross-section 58 can be coupled to one another by means of uprights 59. In particular, the uprights 59 can be welded to the lower cross-section 57 and the upper cross-section 58.

[0086] Furthermore, it can be provided that the lower cross-section 57, the upper cross-section 58, and the uprights 59 are formed by hollow profiles. Furthermore, it can be provided that the first tab 48 and the second tab 51 are welded to the lower cross-section 57. Furthermore, it can be provided that the first hook 54 and the second hook 55 are each welded to one of the uprights 59.

[0087] Fig. 3 shows a first embodiment of the shunting roller 36, 37. As can be seen from Fig. 3, the shunting roller 36, 37 can be provided with a base frame 60. Four shunting roller wheels 61 can be arranged on the base frame 60. The shunting roller wheels 61 can each be coupled to the base frame 60 about a vertical axis of rotation 62. Furthermore, it can of course also be provided that the four shunting roller wheels 61 are each mounted on the base frame 60 so as to be rotatable about a horizontal axis of rotation 63.

[0088] Furthermore, the base frame 60 can be provided with a first beam 64 and a second beam 65, which serve to accommodate the front wheels 25 or the rear wheels 26 of the vehicle 24 to be towed. The distance between the first beam 64 and the second beam 65 can be adjustable in order to be able to lift the front wheels 25 or the rear wheels 26.

[0089] Fig. 4 shows a further and possibly independent embodiment of the attachment 5, wherein the same reference numerals or component designations are used for the same parts as in the preceding Figs. 1 to 3. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figs. 1 to 3.

[0090] As can be seen from Fig. 4, the attachment 5 can be provided, particularly on the coupling frame 8, with an extinguishing agent tank 66. The extinguishing agent tank 66 can be fluidly connected to extinguishing agent nozzles 67 via connecting lines (not shown). The extinguishing agent nozzles 67 can be arranged on the lifting bracket 10.

[0091] Fig. 5a shows a top view of the first embodiment of the attachment 5 in a non-pivoted position. Fig. 5b shows a top view of the first embodiment of the attachment 5 in a pivoted position.

[0092] As can be seen from Fig. 5a, it can be provided that the lifting frame pivot axis 11 is arranged at an axial distance 68 from a coupling frame 8. Furthermore, it can be provided that the first wheel mount 12 and the second wheel mount 13 are arranged at a wheel mount distance 69 from each other. Furthermore, it can be provided that a center point of the first wheel mount 12 and the second wheel mount 13 is arranged at a wheel center distance 70 from the lifting frame pivot axis 11.

[0093] Furthermore, it can be provided that the axle distance 68 is between 200% and 500%, in particular between 250% and 350%, preferably between 280% and 320% of the wheel center distance 70. In particular, it can be provided that the axle distance 68 is between 500 mm and 1000 mm. Furthermore, it can be provided that the wheel center distance 70 is between 150 mm and 400 mm.

[0094] Figs. 6a and 6b show a further and possibly independent embodiment of the attachment 5, wherein the same reference numerals or component designations are used for the same parts as in the preceding Figs. 1 to 5. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figs. 1 to 5.

[0095] As can be seen from Figs. 6a and 6b, it can be provided that the pivot cylinder 17 is coupled to the coupling frame 8 by means of the first pivot mount 18 and to the lifting frame 10 by means of the second pivot mount 19. In particular, it can be provided that the pivot cylinder 17 is coupled to the lifting frame support 14 of the lifting frame 10 by means of the second pivot mount 19.

[0096] Figs. 7a and 7b show a third and possibly independent embodiment of the attachment 5, wherein the same reference numerals or component designations are used for the same parts as in the preceding Figs. 1 to 6. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figs. 1 to 6.

[0097] As can be seen from Fig. 7, it can be provided that the holding arm 9 is relatively short and that a lifting spectacle arm 71 is formed, which is rigidly coupled to the lifting spectacle support 14. In particular, it can be provided that the lifting spectacle 10 comprises the lifting spectacle arm 71.

[0098] In an embodiment such as that shown in Fig. 7, the wheel center distance 70 can be between 200% and 900%, in particular between 300% and 600%, preferably between 350% and 450% of the axle distance 68. This measure allows the lifting bracket pivot axis 11 to be brought as close as possible to the coupling frame 8. This has the advantage that the outer radius 35 of the overall trailer 38 can be reduced, as shown in Fig. 8. At the same time, in such an embodiment variant, if no shunting rollers 36, 37 are used, the lifting bracket pivot axis 11 can be displaced outwards by telescoping the lifting arm 3 in order to be able to influence the inner radius of the trailing vehicle 24 to be towed, in particular in order to prevent the inner radius of the trailing vehicle 24 to be towed from being within the inner radius 33 of the self-propelled work machine 2.

[0099] Fig. 8 shows the third embodiment of the attachment 5 arranged on the self-propelled work machine 2 in conjunction with the vehicle recovery system 1 and the vehicle 24 to be towed in a plan view, wherein again the same reference numerals or component designations as in the previous Figure 1 are used for the same parts. To avoid unnecessary repetition, reference is made to the detailed description in the previous Figure 1. A comparison of the illustrations in Figures 1 and 8 reveals the differences in the lane 39 when using the first embodiment of the attachment 5 or the third embodiment of the attachment 5.

[0100] Figs. 9a and 9b show a fourth and possibly independent embodiment of the attachment 5, wherein the same reference numerals or component designations are used for the same parts as in the preceding Figs. 1 to 8. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figs. 1 to 8.

[0101] As can be seen from Fig. 9, it can be provided that the lifting frame arm 71 is not rigidly coupled to the lifting frame support 14, but that the lifting frame arm 71 is pivotally coupled to the lifting frame support 14 about a lifting frame arm pivot axis 72. At the same time, the lifting frame arm 71 can be pivotally coupled to the coupling frame 8 about the lifting frame axis 11. The fourth embodiment of the attachment 5 is a combination of the first embodiment of the attachment 5 and the third embodiment of the attachment 5.

[0102] The fourth embodiment according to Fig. 9 can have a further pivot cylinder 73, by means of which the lifting frame arm 71 can be pivoted relative to the coupling frame 8. As can be seen from Fig. 9, the angle of the lifting frame support 14 relative to the coupling frame 8 can thereby be actively adjusted, and at the same time, a lateral offset of the lifting frame 10 relative to the coupling frame 8 can be achieved.

[0103] The fourth embodiment of the attachment 5 according to Fig. 9 can thus be a hybrid of the first embodiment of the attachment 5 according to Fig. 5 and the third embodiment of the attachment 5 according to Fig. 7. With such an embodiment, the greatest possible flexibility of the lifting frame can be achieved. In particular, it can be provided that the pivot cylinder 17 and the further pivot cylinder 73 can be pivoted individually and independently of one another.

[0104] The embodiments show possible embodiments, whereby it should be noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but rather various combinations of the individual embodiments with each other are also possible and this possibility of variation lies within the skill of the person skilled in the art in this technical field due to the teaching of technical action by means of the objective invention.

[0105] The scope of protection is determined by the claims. However, the description and drawings must be used to interpret the claims. Individual features or combinations of features from the various embodiments shown and described may represent independent inventive solutions. The problem underlying these independent inventive solutions can be derived from the description.

[0106] All information on value ranges in this description is to be understood as including any and all sub-ranges thereof, e.g. the information 1 to 10 is to be understood as including all sub-ranges starting from the lower limit of 1 and the upper limit of 10, ie all sub-ranges begin with a lower limit of 1 or greater and end with an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.

[0107] For the sake of clarity, it should finally be pointed out that, in order to better understand the structure, some elements have been shown out of scale and / or enlarged and / or reduced in size.

[0108] Reference symbol list

[0109] Vehicle recovery system 28 right front wheel self-propelled self-propelled work machine work machine

[0110] Lifting arm 29 Angle position front wheels

[0111] Interchangeable mount 30 left rear wheel self-propelled

[0112] Attachment work machine

[0113] Chassis 31 right rear wheel self-propelled

[0114] Lift arm swivel axis work machine

[0115] Coupling frame 32 Angle position rear wheels

[0116] Holding arm 33 inner radius self-propelled ar¬

[0117] Lifting glasses working machine

[0118] Lifting eyelet swivel axis 34 Outer radius self-propelled Arfirst wheel mounting work machine second wheel mounting 35 Outer radius total combination

[0119] Lifting glasses wearer 36 first shunting roller

[0120] Pick-up fork 37 second shunting roller

[0121] Swivel bolt 38 complete trailer

[0122] S w iv el c y linder 39 Lane first panning shot 40 Digital computer second panning shot 41 Display

[0123] Angle position of lifting frame 42 Camera system angle sensor 43 Quick-change system first wheel carrier 44 Upper coupling mount second wheel carrier 45 Upper mounting system vehicle to be towed 46 Lower coupling mount

[0124] Front wheels of the vehicle to be towed 47 Locking mechanism 48 First tab

[0125] Rear wheels of towed vehicle 49 first hole 50 first locking bolt left front wheel self-propelled 51 second lug working machine 52 second hole

[0126] 53 second locking bolt first hook second hook

[0127] Hook-in profile lower cross profile upper cross profile

[0128] Stayer

[0129] Base frame

[0130] Shunt roller wheel vertical rotation axis horizontal rotation axis first bar second bar

[0131] extinguishing agent tank

[0132] Extinguishing agent nozzle

[0133] Center distance

[0134] Wheel hub distance

[0135] Wheel center distance

[0136] Lifting glasses arm

[0137] Lifting arm swivel axis of additional swivel cylinder

Claims

Patent claims 1. An attachment (5) for a self-propelled work machine (2), in particular a telescopic loader, the attachment (5) comprising: - a coupling frame (8), wherein the coupling frame (8) is designed for detachable coupling to the interchangeable holder (4) of the self-propelled work machine (2); - a holding arm (9) which is arranged on the coupling frame (8); - a lifting frame (10) which is pivotably mounted on the holding arm (9), wherein the lifting frame (10) has a first wheel receptacle (12) and a second wheel receptacle (13) for receiving the two front wheels (25) or the two rear wheels (26) of a vehicle (24) to be towed.

2. Attachment (5) according to claim 1, characterized in that the coupling frame (8) has an upper coupling receptacle (44) which is designed for positive reception by an upper reception system (45) of the interchangeable receptacle (4) and that the coupling frame (8) has a lower coupling receptacle (46) which is designed for locking with a locking mechanism (47) of the interchangeable receptacle (4).

3. Attachment (5) according to claim 2, characterized in that the lower coupling receptacle (46) has a first tab (48) with a first bore (49) and a second tab (51) with a second bore (52), wherein the first bore (49) serves to receive a first locking bolt (50) of the locking mechanism (47) and the second bore (52) serves to receive a second locking bolt (53) of the locking mechanism (47).

4. Attachment (5) according to one of the preceding claims, characterized in that the coupling frame (8) has a lower cross profile (57) and an upper cross profile (58), wherein the lower cross profile (57) and the upper cross profile (58) are coupled to one another by means of uprights (59), wherein the holding arm (9) is rigidly coupled to the lower cross profile (57).

5. Attachment (5) according to one of the preceding claims, characterized in that a pivoting cylinder (17) is formed, wherein the lifting bracket (10) can be actively pivoted to the holding arm (9) by means of the pivoting cylinder (17).

6. Attachment device (5) according to one of the preceding claims, characterized in that an extinguishing agent tank (66) is formed and that extinguishing agent nozzles (67) are formed which are connected to the extinguishing agent tank (66) flow s.

7. Vehicle recovery system (1) comprising: - a self-propelled work machine (2), in particular a telescopic loader, with a left front wheel (27) and a right front wheel (28) and with a left rear wheel (30) and a right rear wheel (31), wherein the self-propelled work machine (2) has a lifting arm (3) on which an interchangeable holder (4) for releasably receiving an attachment (5) is formed, wherein the front wheels (27, 28) and the rear wheels (30, 31) of the self-propelled work machine (2) are steerable; - an attachment (5) which is designed according to one of the preceding claims, wherein the coupling frame (8) of the attachment (5) is coupled to the interchangeable holder (4) of the self-propelled work machine (2).

8. Vehicle recovery system (1) according to claim 7, further comprising a first shunting roller (36) and a second shunting roller (37), wherein the shunting rollers (36, 37) each have a base frame (60) and four shunting roller wheels (61) arranged on the base frame (60), wherein the shunting roller wheels (61) are each designed to be rotatable about a vertical axis of rotation (62) to the base frame (60).

9. Vehicle recovery system (1) according to claim 7 or 8, characterized in that the interchangeable holder (4) has a quick-change system (43), wherein the coupling frame (8) of the attachment (5) is hydraulically lockable.

10. Vehicle recovery system (1) according to one of claims 7 to 9, characterized in that the lifting arm (3) is telescopic.

11. Vehicle recovery system (1) according to one of claims 7 to 10, further comprising a digital computer (40), a camera system (42) and a display (41), wherein the display (41) is designed to show an image recorded by the camera system (42), wherein the digital computer (40) is programmed to display an overlay of the lane (39) on the image recorded by the camera system (42), wherein the overlay of the lane (39) is calculated using data from sensors for detecting the angular position (29) of the front wheels (27, 28) of the self-propelled work machine (2), the angular position (32) of the rear wheels (30, 31) of the self-propelled work machine (2) and for detecting the angular position (20) of the lifting frame (10) relative to the support arm (9).

12. Vehicle recovery system (1) according to claim 11, characterized in that the camera system (42) comprises a thermal imaging camera.

13. A method for towing a vehicle (24), the method comprising the steps of: - Providing a vehicle recovery system (1) comprising: + a self-propelled working machine (2), in particular a telescopic loader, with a left front wheel (27) and a right front wheel (28) and with a left rear wheel (30) and a right rear wheel (31), wherein the self-propelled working machine (2) has a lifting arm (3), on which an interchangeable holder (4) for releasably receiving an attachment (5) is formed, wherein the front wheels (27, 28) and the rear wheels (30, 31) of the self-propelled work machine (2) are steerable; + an attachment (5), comprising ++ a coupling frame (8), wherein the coupling frame (8) is designed for detachable coupling with the interchangeable holder (4) of the self-propelled work machine (2), ++ a holding arm (9) which is arranged on the coupling frame (8), ++ a lifting frame (10) which is pivotably mounted on the holding arm (9), wherein the lifting frame (10) has a first wheel holder (12) and a second wheel holder (13) for receiving the two front wheels (25) or the two rear wheels (26) of a vehicle (24) to be towed, wherein the coupling frame (8) of the attachment (5) is connected to the interchangeable holder (4) is coupled to the self-propelled work machine (2); - Pick up the two front wheels (25) or the two rear wheels (26) of the vehicle to be towed vehicle (24) on the first wheel mount (12) and on the second wheel mount (13); - Moving the vehicle to be towed (24) by means of the vehicle recovery system (1).

14. Method according to claim 13, characterized in that those wheels (25, 26) of the vehicle to be towed (24) which are not received on the first wheel receptacle (12) and on the second wheel receptacle (13) of the lifting frame (10) are received on a first shunting roller (36) and a second shunting roller (37) and that the vehicle to be towed (24) is pivoted relative to the coupling frame (8) by actively pivoting the lifting frame (10) by means of the pivoting cylinder (17).

15. The method according to claim 14, characterized in that in a first mode, the active pivoting of the lifting frame (10) relative to the coupling frame (8) by means of the pivot cylinder (17) is carried out by an input by means of an input means independent of the steering system and that in a second mode, the active pivoting of the lifting frame (10) relative to the coupling frame (8) by means of the pivot cylinder (17) is coupled to the steering system and does not require a separate input.

16. Method according to one of claims 13 to 15, characterized in that an overlay of the lane (39) is displayed on a display (41), which overlay is calculated in a digital computer (40) on the basis of the angular position (29) of the front wheels (27, 28) of the self-propelled work machine (2), the angular position (32) of the rear wheels (30, 31) of the self-propelled work machine (2) and the angular position (20) of the lifting frame (10) to the holding arm (9).

17. Method according to one of claims 13 to 16, characterized in that when cornering to the left, the front wheels (27, 28) of the self-propelled work machine (2) are turned to the left and the rear wheels (30, 31) of the self-propelled work machine (2) are turned to the right and the lifting frame (10) is pivoted to the left relative to the coupling frame (8) and when cornering to the right, the front wheels (27, 28) of the self-propelled work machine (2) are turned to the right and the rear wheels (30, 31) of the self-propelled Working machine (2) is turned to the left and the lifting frame (10) is pivoted to the right relative to the coupling frame (8).

18. Method according to one of claims 13 to 16, characterized in that a desired angular position of the lifting frame (10) relative to the holding arm (9) is calculated by means of the digital computer (40) and the camera system (42), and the actual angular position (20) of the lifting frame (10) relative to the holding arm (9) is automatically adjusted as a function of the angular position (29) of the front wheels (27, 28) and the rear wheels (30, 31) of the self-propelled work machine (2).

19. Method according to claim 18, characterized in that the travel movement of the self-propelled work machine (2) is also controlled automatically by means of the digital computer (40) and the camera system (42).

20. Method according to claim 16, characterized in that the angular position (20) of the lifting frame (10) relative to the holding arm (9) is detected by detecting the position of the shunting rollers (36, 37) relative to the coupling frame (8) or relative to the holding arm (9) or relative to the interchangeable holder (4) of the self-propelled work machine (2).

21. Method according to one of claims 13 to 20, characterized in that the lifting arm (3) of the self-propelled work machine (2) is telescoped out, and the interchangeable holder (4) is moved away from a chassis (6) of the self-propelled work machine (2) in order to influence the track (39) of a trailing vehicle (24) to be towed, which vehicle is not mounted on shunting rollers (36, 37).

Images