STABILIZER

Description

[0001] The invention relates to a stabilizer for an attachment device of a vehicle according to the preamble of claim 1.

[0002] Such a stabilizer is known, for example, from EP 2 744 320 B1. The stabilizer can be adjusted in length to adapt to attachments of different widths that can be connected to the attachment device. This is done by a screw connection between the second connecting element and the second adjusting element. The second connecting element can be held or fixed to the second adjusting element in different axial positions relative to the latter. In the assembled state, the first connecting element is pivotally connected to the vehicle, but is coupled to the vehicle in a rotationally fixed manner about a longitudinal axis of the stabilizer. The second connecting element is also pivotally attached, for example, to a lower link of the attachment device, but is held in a rotationally fixed manner about the longitudinal axis of the stabilizer.To allow the second connecting element to be rotated relative to the second adjusting element to adjust its length via the screw connection, the first adjusting element and the second adjusting element are mounted so they can rotate relative to each other around the longitudinal axis of the stabilizer. When the stabilizer is installed, the second adjusting element can be rotated relative to the second connecting element, allowing the length of the stabilizer to be adjusted via the screw connection.

[0003] To prevent unintentional rotation of the second adjusting element relative to the second connecting element and thus unintentional changes in the length of the stabilizer, the stabilizer according to EP 2 744 320 B1 has a spring clip that is pivotally attached to the first adjusting element and, in a locked position, engages in a recess of a locking collar. The locking collar is arranged on the second adjusting element. This leads to a relative movement of the spring clip relative to the locking collar during compression and rebound movements of the two adjusting elements. This can lead to increased wear of the components that move relative to one another.

[0004] DE 35 05 243 A1 shows a lateral stabilizer with a tubular section and a shaft section guided axially displaceably within the tubular section, as well as connecting parts arranged on the tubular section and the shaft section, respectively, for establishing a connection to a lower link and a pivot point on a tractor. A connecting part of the stabilizer is provided with a screw-in bolt that can be screwed into a corresponding internal thread of the tubular section and secured with a lock nut. This allows the length of the lateral stabilizer to be adjusted and thus adapted to the respective coupling conditions.

[0005] DE 197 44 328 C1 discloses a side strut for a tractor lower link with a single-acting hydraulic cylinder, the piston of which has first connection means at a first end of the side strut for connection to the tractor rear. The side strut further comprises second connection means at a second end for connecting the side strut to the lower link. The side strut further comprises a telescopic unit and an adjustment unit. The adjustment unit serves to adjust the basic distance between the two connection means in order to set a spread (category) of the lower links relative to each other. The telescopic unit serves to compensate for the change in length of the side strut when the lower links are deflected laterally. The object of the present invention is to provide a length-adjustable stabilizer that is less susceptible to wear.

[0006] The object is achieved by a stabilizer having the features of claim 1. Exemplary embodiments emerge from the dependent claims.

[0007] The fact that the locking device is connected to the second actuating element and the second connecting element ensures, on the one hand, that the second actuating element cannot be rotated relative to the second connecting element in the locked position. On the other hand, it ensures that the locking device is attached to two elements, namely the second actuating element and the second connecting element, which do not move relative to each other when the two actuating elements move relative to each other. This prevents wear on the locking device.

[0008] The locking device also has a bracket that is adjustably, in particular pivotably, connected to one of the two elements of the group consisting of the second adjusting element and the second connecting element. Furthermore, the locking device has a locking element that is attached to the other of the two elements of the group consisting of the second adjusting element and the second connecting element. In the locking position of the locking device, the bracket is supported against the locking element in the direction of rotation about the longitudinal axis.

[0009] The locking element can have a slot, wherein the bracket is aligned parallel to the longitudinal axis in the locking position of the locking device and engages in the slot of the locking element.

[0010] The stabilizer may further comprise a locking pawl adjustably connected to one of the two elements of the group consisting of the first actuating element and the second actuating element. The stabilizer may also comprise at least one locking element connected to the other of the two elements of the group consisting of the first actuating element and the second actuating element. The locking pawl can be moved into a locking position in which the first actuating element and the second actuating element are supported against each other at least in the axial direction.

[0011] In this case, the at least one blocking element can be the locking element.

[0012] The bracket can be rigid or elastic, for example in the form of a spring bracket.

[0013] The stabilizer can be designed as a purely mechanical stabilizer or as a hydraulically operated stabilizer, wherein in the latter case the first actuating element comprises a hydraulic cylinder, in particular a single-acting hydraulic cylinder, which can be subjected to hydraulic pressure in an extension direction.

[0014] In one embodiment of the stabilizer, the second connecting element can be fixed to the second actuating element at least in an extending position and in a shortening position. When the first actuating element and the second actuating element are in the maximally retracted position relative to one another and the second connecting element is in the extending position, the first actuating element can be axially supported against the second connecting element or the second actuating element. Furthermore, when the first actuating element and the second actuating element are in the maximally retracted position relative to one another and the second connecting element is in the shortening position, the first actuating element can be axially supported against the second connecting element.

[0015] Because the first adjusting element is axially supported against the second connecting element in the fully retracted position of the first adjusting element and the second adjusting element relative to each other, and the second connecting element in the shortened position, the fully retracted position depends on the position of the second connecting element relative to the second adjusting element. The position of the second connecting element relative to the second adjusting element, in turn, depends on the required length setting of the stabilizer and thus on the category with regard to the width of the attachment to be attached. Thus, adjusting the length of the stabilizer to a specific category of the attachment automatically results in an adjustment of the length of the floating path.Since the length of the stabilizer is reduced to accommodate a wider attachment, the second connecting element is moved to a shortened position so that it engages with the first adjusting element earlier than the second adjusting element when adjusted. This reduces the float path compared to an extended position of the second connecting element.

[0016] According to one embodiment, the second actuating element has a guide receptacle in which a guide section of the first actuating element is guided in an axially adjustable manner. The first actuating element and the second actuating element are guided telescopically relative to one another by the second actuating element inserting into the guide receptacle of the first actuating element.

[0017] Furthermore, the second adjusting element can have an adjustment receptacle in which a shaft of the second connecting element is axially adjustable, with the adjustment receptacle merging into the guide receptacle. In the shortening position of the second connecting element, it extends further into the adjustment receptacle than in an extending position. Furthermore, the shaft of the second connecting element extends into the guide receptacle of the second adjusting element.

[0018] The shaft of the second connecting element can thus protrude into the guide receptacle in the shortening position of the second connecting element, wherein, in the maximum retracted position of the first adjusting element and the second adjusting element relative to one another, the guide section of the first adjusting element is axially supported against the shaft of the second connecting element.

[0019] The shaft and the adjustment mount can together form a screw connection. The shaft can be designed as a threaded shaft with an external thread that is screwed into an internal thread of the adjustment mount.

[0020] A spring or a spring arrangement can be provided so that the first actuating element and the second actuating element can be adjusted from an initial position towards the maximum retracted position against the force of the spring.

[0021] Furthermore, a spring or a spring arrangement can be provided so that the first actuating element and the second actuating element can be adjusted from an initial position towards a position in which they are moved apart to the maximum extent, counter to the force of a spring.

[0022] The spring or spring arrangement for generating a force when adjusting towards the maximum retracted position can be the same spring or spring arrangement for generating a force when adjusting towards the maximum extended position.

[0023] Exemplary embodiments of the invention are explained in more detail below with reference to the figures. Figure 1a tractor with a three-point hitch, Figure 2a schematic plan view of the lower links of the three-point hitch according to Figure 1 with stabilizers for stabilizing the lower links, Figure 3 a perspective view of a stabilizer that can be locked in tension and compression, with a second connecting element in a shortening position, Figure 4 a perspective view of the stabilizer according to Figure 3with the second connecting element in an extending position, Figure 5 a perspective view of the stabilizer according to Figure 3 with a pawl in a floating position, Figure 6 a perspective view of the stabilizer according to Figure 3 with a bracket of a locking device in a release position, Figure 7 a partial longitudinal section of the stabilizer according to Figure 3 in an initial position and with the second connecting element in the extending position, Figure 8 shows a partial longitudinal section of the stabilizer according to Figure 3 in a maximum retracted position and with the second connecting element in the extending position, Figure 9 shows a partial longitudinal section of the stabilizer according to Figure 3in a maximally retracted position and with the second connecting element in the shortening position and Figure 10 a perspective view of a further embodiment of a stabilizer which can only be locked by pressure and with a bracket of the locking device which is pivotally attached to a bolt of a fastening fork of the second connecting element.

[0024] From the Figure 1 is a vehicle, in particular an agricultural machine in the form of a tractor 1 with an attachment device arranged at its rear in the form of a three-point attachment device 2 with two lower links, of which a lower link 3 in Figure 1 visible, and a top link 5. The lower link 3 is pivotally attached to the tractor 1 at one end. In addition to the visible lower link 3, another lower link 4 ( Figure 2) is attached. Above and between these two lower links 3, 4, the upper link 5 is pivotally connected at one end to the rear of the tractor 1. The lower links 3, 4 and the upper link 5 are used to attach an attachment (not shown) to the tractor 1. For this purpose, coupling hooks 9, 10, 11 are attached to free ends 6, 7 of the lower links 3, 4 and to a free end 8 of the upper link 5, which serve to accommodate coupling elements of the attachment.

[0025] For vertical lifting and lowering of the attached implement, the lower link 3 is connected to a lifting arm 13 by means of a lifting strut 12. The lifting arm 13 is connected to a power drive (not shown), via which the lifting arm 13 can be raised and lowered. The lower link 3 is also raised or lowered via the lifting strut 12. Figure 1 The lower link 4, which is not visible, is connected in an identical manner to another lifting rod and another lifting arm.

[0026] Figure 2 shows a plan view of the two lower links 3, 4, which are arranged so as to be pivotable about a pivot axis S at fastening points 14, 15 at the rear of the tractor 1. The two fastening points 14, 15 are arranged offset laterally at the same distance from a tractor longitudinal axis M. The two lower links 3, 4 can perform both lateral movements and lifting movements. The lower links 3, 4 are shown with solid lines in a centered middle position in which the lower links 3, 4 are arranged mirror-symmetrically to the tractor longitudinal axis M, so that the coupling hooks 9, 10 of the lower links 3, 4 are arranged at the same distance from the tractor longitudinal axis M.

[0027] The lower links 3, 4 can be pivoted from the centered position in a lateral direction around an axis that is arranged perpendicular to the pivot axis S and the tractor longitudinal axis M. In Figure 2The lower links 3, 4 are shown in dashed lines in an exemplary pivoted lateral position. Here, the coupling hooks 9, 10 of the lower links 3, 4 are offset laterally by the dimension X relative to the center position.

[0028] For stabilization, i.e. to prevent lateral movement of the two lower links 3, 4, stabilizers 16, 17 are connected to each of them. The two stabilizers 16, 17 are each attached at one end by means of first connecting means 18, 19, laterally offset from the fastening points 14, 15 of the lower links 3, 4, to corresponding fastening means at the rear of the tractor 1, which are centered on the pivot axis S. The stabilizers 16, 17 are each connected to one of the lower links 3, 4 by means of second connecting means 20, 21 provided at the other ends of the stabilizers 16, 17.

[0029] If a lateral movement occurs at the lower links 3, 4 when an attachment is attached, the two lower links 3, 4 are shifted, for example from the central position shown in solid lines to the lateral position shown in dashed lines. The lengths L1, L2 of the two stabilizers 16, 17 change, whereby the lengths L1, L2 correspond to the distances between the first connecting elements 18, 19 and the second connecting elements 20, 21. The length L1 of the right stabilizer 16, viewed in the direction of travel F, shortens from the dimension L1 to L1'. The length L2 of the left stabilizer 17, viewed in the direction of travel F, lengthens from the dimension L2 to L2'. The changes in length of the two stabilizers 16, 17 are different.

[0030] When swiveling the lower links 3, 4 around the fastening points 14, 15 in the opposite direction to Figure 2As shown, the length L1 would be extended and the length L2 shortened accordingly.

[0031] By constructively fixing the stabilizers 16, 17 with regard to the maximum shortening, the stabilizers 16, 17 ensure that the lower links 3, 4 are in a maximum lateral position (for example, according to the position shown in dashed lines in Figure 2) do not strike the rear wheels of the tractor 1. Furthermore, the two stabilizers 16, 17 serve to keep a trailed implement centered on the tractor's longitudinal axis M when the three-point hitch 2 is, for example, in a raised transport position. The same applies when no implement is trailed and the lower links 3, 4 are in a transport position. In this state, the two stabilizers 16, 17 ensure that the lower links 3, 4 are held in such a way that they cannot move laterally outwards from the tractor's longitudinal axis M by the set spread A. The spread A between the coupling hooks 9, 10 of the two lower links 3, 4 can be adjusted by means of telescopic adjustments integrated into the stabilizers 16, 17, which can be adjusted manually, if implements with a category different from the set category are to be coupled.

[0032] The Figures 3 to 6 show the stabilizer 16 on the right lower link 3 according to Figure 2 , whereby the stabilizer 17 on the left lower link 4 can be constructed identically, in different positions. Figures 7 to 9 show the stabilizer 16 in a partial longitudinal section, also in different positions. Figures 3 to 9 are described together below.

[0033] The stabilizer 16 has a first adjusting element 22 and a second adjusting element 23, which are adjustable relative to one another for changing the length of the stabilizer 16 along a longitudinal axis Y of the stabilizer 16.

[0034] To support the stabilizer 16 against the tractor or to attach the stabilizer 16 to the tractor, a first connecting element 24 with the first connection means 18, here in the form of a ball joint, is arranged on the first adjusting element 22. The first connecting element 24 is an integral part of the first adjusting element 22, but can also be designed as a separate component connected to the first adjusting element 22.

[0035] The stabilizer 16 further comprises a second connecting element 25, which is connected to the second adjusting element 23 and serves to support or fasten the stabilizer 16 to a lower link of the attachment device. The second connecting element 25 has the second connection means 20, here in the form of a fastening fork. The second connecting element 25 is attached to the second adjusting element 23 via a screw connection, which will be explained in more detail below, so that it can be axially adjusted along the longitudinal axis Y.

[0036] To guide the first adjusting element 22 relative to the second adjusting element 23 and thus to change the length of the stabilizer 16, the first adjusting element 23 comprises a guide receptacle 26 formed by a tube 37. The tube 37 is welded to a base body 27 of the second adjusting element 23 coaxially to the longitudinal axis Y, wherein the guide receptacle 26 of the tube 37 is open in the direction of the first connecting element 24. In A guide section 28 of the first adjusting element 22 is guided in an axially adjustable manner in the guide receptacle 26.

[0037] For this purpose, a rear pressure ring 29 and a front pressure ring 30 are seated on the guide section 28 of the first adjusting element 22 and are guided displaceably on the guide section 28. In an initial position of the first actuating element 22 and the second actuating element 23 relative to each other ( Figure 7), the rear pressure ring 29 is axially supported against a shoulder 31 of the first adjusting element 22 in the direction of the first connecting element 24. The front pressure ring 30 is axially supported against a retaining ring 32 on the guide section 28 of the first adjusting element 22 in the direction of the second connecting element 25. Furthermore, the front pressure ring 30 is axially supported against a shoulder 33 of the second adjusting element 23 in the direction of the second connecting element 25, and the rear pressure ring 29 is axially supported against a retaining ring 34 of the second adjusting element 23 in the direction of the first connecting element 24. The two pressure rings 29, 30 are supported against one another via a spring or spring arrangement, here a compression spring 35, wherein the compression spring 35 is designed as a helical spring and sits coaxially to the longitudinal axis Y on the guide section 28 of the first adjusting element 22.

[0038] Between the two pressure rings 29, 30, a sleeve 36 is arranged, against which the pressure rings 29, 30 can be axially supported and which is arranged around the compression spring 35. The axial length of the sleeve 36 is less than the distance between the two pressure rings 29, 30 in the Figure 7 shown initial position of the first actuating element 22 and the second actuating element 23 to each other.

[0039] If a force is now exerted on the second actuating element 23 along the longitudinal axis Y in the direction of the first connecting element 24 to retract the stabilizer 16, the second actuating element 23 is supported via the shoulder 33 against the front pressure ring 30. The second actuating element 23 presses the front pressure ring 30 against the spring force of the compression spring 35 on the guide section 28 of the first actuating element 22 in the direction of the rear pressure ring 29. In doing so, the front pressure ring 30 displaces the sleeve 36 until the front pressure ring 30 is supported via the sleeve 36 against the rear pressure ring 29. The force is supported by the rear pressure ring 29 via the shoulder 31 against the first actuating element 22. This position of the stabilizer 16 is in Figure 8 and corresponds to a maximum retracted position of the first actuating element 22 and the second actuating element 23 relative to each other.

[0040] In addition, the stabilizer 16 can be moved from the initial position according to Figure 7 be moved further apart by exerting a force on the second adjusting element 23 along the longitudinal axis Y away from the first connecting element 24. In this case, the second adjusting element 23 is supported via the retaining ring 34 against the rear pressure ring 29 and moves the latter on the guide section 28 of the first adjusting element 22 in the direction of the front pressure ring 30 until the rear pressure ring 29 is supported via the sleeve 36 against the front pressure ring 30. The front pressure ring 30 is in turn supported axially via the retaining ring 32 on the guide section 28 of the first adjusting element 22. This position corresponds to a maximum moved-apart position (not shown) of the first adjusting element 22 and the second adjusting element 23 relative to one another.

[0041] Because the rear pressure ring 29 and the front pressure ring 30 are pressurized against each other by the compression spring 35, the stabilizer 16 is always returned to the initial position according to Figure 7 pressed, provided no external forces act on the stabilizer 16.

[0042] In order to lock the stabilizer 16 against longitudinal adjustment or adjustment of the first adjusting element 22 and the second adjusting element 23 relative to each other, the stabilizer 16 has a locking pawl 38, which is pivotally connected to the first adjusting element 22 about a pawl axis K. The pawl axis K runs transversely to the longitudinal axis Y and intersects it, for example, at a right angle or crosses it at a distance.

[0043] The second adjusting element 23 has a locking element 39 in the form of an outwardly projecting circumferential collar. The locking pawl 38 comprises two cheeks 40, 41, which, when the locking pawl 38 is in a locked position, partially accommodate the first adjusting element 22 and the second adjusting element 23 between them. Furthermore, the cheeks 40, 41 each have a locking recess 42, 43, which face one another and, when the locking pawl 38 is in the locked position, accommodate the locking element 39 such that the locking element 39 is supported in both adjustment directions of the second adjusting element 23 relative to the first adjusting element 22. Adjustment of the second adjusting element 23 relative to the first adjusting element 22 is thus prevented.

[0044] In a floating position, the locking element 39 is not received in the locking recesses 42, 43 of the pawl 38, so that the second actuating element 23 can be moved freely relative to the first actuating element 22.

[0045] In principle, the locking pawl 38 can also be pivotally attached to the second actuating element 23, in which case the locking element 39 is arranged on the first actuating element 22.

[0046] In order to be able to adapt the stabilizer 16 to attachments of different widths, the length of the stabilizer 16 can be changed independently of the position of the two adjusting elements 22, 23 relative to one another. For this purpose, as already explained above, the second connecting element 25 is adjustable in its axial position relative to the second adjusting element 23. For this purpose, the second connecting element 25 has a shaft 44 provided with an external thread 45. The second adjusting element 23 has an adjustment receptacle 46 which is arranged coaxially to the longitudinal axis Y and is provided with an internal thread 47. The shaft 44 is screwed with its external thread 45 coaxially to the longitudinal axis Y into the internal thread 47 of the adjustment receptacle 46.The axial position of the second connecting element 25 and thus of the second connecting means 20 relative to the first connecting means 16 can be adjusted by screwing the shaft 44 to different depths into the adjustment receptacle 46.

[0047] The adjustment receptacle 46 merges into the guide receptacle 26 of the second adjusting element 23. Depending on how deeply the shaft 44 is screwed into the adjustment receptacle 46, the shaft 44 projects into the guide receptacle 26, as is the case, for example, in the Figure 9can be seen. In the fully retracted position of the stabilizer 16, the guide section 28 of the first adjusting element 22 thus abuts axially against the shaft 44 of the second connecting element 25 and is axially supported against it. If, however, the shaft 44 is not screwed into the adjustment receptacle 46 far enough that it projects into the guide receptacle 26, in the fully retracted position of the stabilizer 16, the guide section 28 of the first adjusting element 22 is axially supported against a circumferential shoulder 48 of the base body 27 of the second adjusting element 23 (as shown in Figure 8 Thus, in this case, the stabilizer 16 can be retracted further than is the case when the shaft 44 of the second connecting element 25 projects into the guide receptacle 26. The free floating path of the stabilizer can thus be changed.

[0048] It should be noted that the maximum retracted position of the stabilizer 16 depends on the position of the second connecting element 25 on the second actuating element 23.

[0049] To adjust the second connecting element 25 relative to the second adjusting element 23, the second adjusting element 23 is rotated about the longitudinal axis Y when the stabilizer 16 is mounted on the tractor and on the attachment device. Since the second connecting element 25 is supported in a rotationally fixed manner relative to the lower link of the attachment device via the second connecting means 20, the shaft 44 is screwed into or out of the adjustment receptacle 46 by rotating the second adjusting element 23.

[0050] In order to prevent unintentional rotation of the second adjusting element 23 and thus unintentional adjustment of the axial position of the second connecting element 25, a locking device 48 is provided. The locking device 48 comprises a bracket 49 which is arranged between a Figure 5 locking position shown and one in Figure 6 shown release position is pivotally attached to the second connecting element 25. The bracket 49 is pivotable about a bracket axis B, which is arranged parallel to the pawl axis K. In principle, the bracket 49 can also be adjusted in other ways, for example, it can be displaced parallel to the longitudinal axis Y.

[0051] The locking device 48 further comprises a locking element in the form of a radially outwardly projecting collar coaxial with the longitudinal axis Y. In the present case, the blocking element 39 for blocking the axial movement of the two adjusting elements relative to one another is simultaneously also the locking element.

[0052] However, it is also conceivable for the locking element to be formed separately from the blocking element 39. The locking element can, for example, be formed between the blocking element 39 and the second connecting element 25 on the first actuating element 23 in the form of a radially projecting, circumferential collar, comparable to the blocking element 39. It is also conceivable for a plurality of locking elements distributed over the circumference to be provided on the second actuating element 23. Likewise, a plurality of blocking elements can be arranged distributed over the circumference on the second actuating element 23, which simultaneously form the locking elements.

[0053] Slots 51 are arranged in the locking element (blocking element) 39 distributed over the circumference, into which slots, depending on the rotational position of the second adjusting element 23 relative to the second connecting element 25, the bracket 49 can be inserted and connects the second adjusting element 23 and the second connecting element 25 in a rotationally fixed manner or supports them against each other in a rotationally fixed manner.

[0054] The bracket 49 is pivotally mounted between two tabs 52, 53, which are integral components of the second connecting element 25. To secure the bracket 49 in its locking position, a locking pin 54 can be fixed to the two tabs 52, 53.

[0055] Figure 10 shows a further embodiment of a stabilizer, wherein corresponding elements are provided with the same reference numerals as in the embodiment according to the Figures 3 to 9 and are described there. In contrast to the stabilizer according to Figures 3 to 9The bracket 49 is pivotally attached to a fastening bolt 50, wherein the fastening bolt 50 is a component of the second connection means 20 on the second connecting element 25 and serves to fix the stabilizer to the lower link. The bracket 49 is arranged in its locking position between the two tabs 52, 53 and extends into the slot 51 of the locking element (locking element) 39 and is fixed to the two tabs 52, 23 by the locking pin 54. The locking pawl 38 is also designed such that the stabilizer 16 can only be locked against contraction, i.e., by pressure and not by tension. The locking pawl is designed for this purpose without a locking recess. In the locked position of the locking pawl 38, the locking element 39 is only axially supported at the end against the locking pawl 38. Furthermore, the stabilizer 16 is according to Figure 10 identically constructed to the stabilizer according to the Figures 3 to 9 . List of reference symbols

[0056] 1 Tractor 2 Three-point hitch 3 Lower link 4 Lower link 5 Top link 6 Free end 7 Free end 8 Free end 9 Coupling hook 10 Coupling hook 11 Coupling hook 12 Lifting strut 13 Lifting arm 14 Attachment point 15 Attachment point 16 Stabilizer 17 Stabilizer 18 First connection element 19 First connection element 20 Second connection element 21 Second connection element 22 First adjusting element 23 Second adjusting element 24 First connecting element 25 Second connecting element 26 Guide mount 27 Base body 28 Guide section 29 Rear thrust ring 30 Front thrust ring 31 Shoulder 32 Retaining ring 33 Shoulder 34 Retaining ring 35 Compression spring 36 Sleeve 37 Tube 38Pawl 39Locking element / locking element 40Chew 41Chew 42Locking recess 43Locking recess 44Shaft 45External thread 46Adjustment receptacle 47Internal thread 48Locking device 49Bail 50Fastening bolt 51Slot 52Tab 53Tab 54Locking pin AExpansion dimension BBail axis KKawl axis L1, L1'Length L2,L2'Length MTractor longitudinal axis SSwidth axis XLateral displacement YLongitudinal axis,

Claims

1. Stabilizer (16) for an attachment device(2) of a vehicle (1) comprising: a first adjusting element (22) and a second adjusting element (23) which are guided adjustably relative to one another along a longitudinal axis (Y) in order to vary the length of the stabilizer (16), a first connecting element (24) on the first adjusting element (22) for supporting the stabilizer (16) against the vehicle (1), and a second connecting element (25) on the second adjusting element (23) for supporting the stabilizer (16) against an element of the attachment device (2), the stabilizer (16) being designed to change the length of the stabilizer (16) in such a way that the second connecting element (25) is connected to the second adjusting element (23) in the state of the stabilizer (16) mounted on the vehicle (1) and on the attachment device (2) so as to be rotatable about the longitudinal axis (Y) via a screw connection, irrespective of the position of the two adjusting elements (22, 23) relative to one another, characterized in that the stabilizer (16) further has a locking device (48), which is connected to the second adjusting element (23) and the second connecting element (25), the second adjusting element (23) and the second connecting element (25) being connected to one another in a rotationally fixed manner in a locking position of the locking device (48), that the locking device (48) has a bracket (49), which is connected pivotably to one of the two elements of the group comprising the second adjusting element (23) and the second connecting element (25), that the locking device (48) has a locking element (39), which is fastened to the other of the two elements of the group comprising the second adjusting element (23) and the second connecting element (25), and that, in the locking position of the locking device (48), the bracket (49) is supported against the locking element (39) in the direction of rotation about the longitudinal axis (Y).

2. Stabilizer according to claim 1, characterized in that the locking element (39) has a slot (51), and that, in the locking position of the locking device (48), the bracket (49) is aligned parallel to the longitudinal axis (Y) and engages in the slot (51) of the locking element (39).

3. Stabilizer according to claim 1 or 2, characterized in that the stabilizer (16) further comprises a latch (38) adjustably connected to one of the two elements of the group consisting of the first adjusting element (22) and the second adjusting element (23), that the stabilizer (16) further comprises at least one latching element, which is connected to the other of the two elements of the group consisting of the first adjusting element (22) and the second adjusting element (23), and that the latch (38) can be transferred into a latching position, in which the first adjusting element (22) and the second adjusting element (23) are supported against one another at least in one axial direction of the longitudinal axis (Y).

4. Stabilizer according to claim 3, characterized in in that the at least one latching element is the locking element (39).

5. Stabilizer according to one of claims 1 to 4, characterized in that the bracket (49) is rigid or elastically resilient.

6. Stabilizer according to one of claims 1 to 5, characterized in that the first adjusting element (22) comprises a hydraulic cylinder.

7. Stabilizer according to claim 6, characterized in that the hydraulic cylinder is a single-acting hydraulic cylinder to which hydraulic pressure can be applied in an extension direction.

8. Stabilizer according to one of claims 1 to 7, characterized in that the second connecting element (25) can be fixed to the second adjusting element (23) at least in an extending position and in a shortening position, that, in a maximally retracted position of the first adjusting element (22) and the second adjusting element (23) relative to each other and in the extending position of the second connecting element (25), the first adjusting element (22) is axially supported against the second connecting element (25) or the second adjusting element (23), and that, in the maximally retracted position of the first adjusting element (22) and the second adjusting element (23) relative to each other and in the shortening position of the second connecting element (25), the first adjusting element (22) is axially supported against the second connecting element (25).

9. Stabilizer according to claim 8, characterized in that the second adjusting element (23) has a guide receptacle (26), in which a guide portion (28) of the first adjusting element (22) is guided in an axially adjustable manner.

10. Stabilizer according to claim 9, characterized in that the second adjusting element (23) has an adjusting receptacle (46) in which a shank (44) of the second connecting element (25) is received in an axially adjustable manner, the adjusting receptacle (46) merging into the guide receptacle (26).

11. Stabilizer according to claim 10, characterized in that the shank (44) of the second connecting element (25) projects into the guide receptacle (26) in the shortening position of the second connecting element (25), the guide portion (28) of the first adjusting element (22) being supported axially against the shank (44) of the second connecting element (25) in the maximum retracted position of the first adjusting element (22) and of the second adjusting element (23) with respect to one another.

12. Stabilizer according to one of claims 1 to 11, characterized in that the first adjusting element (22) and the second adjusting element (23) can be adjusted, starting from an initial position, in the direction towards the maximum retracted position against the force of a spring (35).

13. Stabilizer according to one of claims 1 to 12, characterized in that the first adjusting element (22) and the second adjusting element (23) can be adjusted, starting from an initial position, in the direction towards a maximally extended position against the force of a spring (35).