WO2008148749A1

WO2008148749A1 - Stabilizer for a three-point attachment device

Info

Publication number: WO2008148749A1
Application number: PCT/EP2008/056819
Authority: WO
Inventors: Daniel Vergara
Original assignee: Deere & Company
Priority date: 2007-06-08
Filing date: 2008-06-03
Publication date: 2008-12-11
Also published as: DE102007026687A1

Abstract

The invention relates to a stabilizer (30, 32) for a three-point attachment device (10). The stabilizer (30, 32) comprises a cylindrical housing (40), a first rod (42) guided in the housing (40) and a second rod (44) guided in the housing. The first rod (42) is received on one end adjustably via a thread (46) at one end of the housing (40) and the second rod (44) is received in a telescoping manner in the housing (40) at a second end of the housing (40). The rods (42, 44) received at the respective ends of the housing (40) comprise articulated connecting means (48, 50) on the other end. A first locking device for setting an operational state having a substantially fixed stabilizer length and a first locking device for setting an operational state having a limited-variable stabilizer length are provided. In order to make the use of the stabilizer (30, 32) with different categories of work tools effective and easy, it is proposed that a further locking device for setting a further operational state having a substantially fixed stabilizer length and a further locking device for setting a further operational state having a limited-variable stabilizer length are provided.

Description

Stabilizer for a three-point hitch

The invention relates to a stabilizer for a three-point hitch, comprising a cylindrical housing, a first rod guided in the housing, a second rod guided in the housing, wherein the first rod at one end adjustably received via a threaded at a first end of the housing and the second rod telescoping at one end is accommodated in the housing at a second end of the housing and wherein the rods received at the respective end of the housing have at the other hinge means, a locking device for setting an operating condition with substantially fixed stabilizer length and a locking device for setting an operating condition with limited variable stabilizer length.

There are stabilizers for three-point hitch known, for example, serve to stabilize the lower links of the three-point hitch laterally. The lower links of a three-point hitch are hinged to a certain extent laterally to a certain extent, in order to ensure a necessary for the operation of trailers lateral play. This lateral play is limited by the use of stabilizers, which represent a bracing between lower link and mounting frame. Such a stabilizer usually comprises a cylindrical housing or tube in which protrudes a rod on both sides of the ends. At the protruding from the pipe rods are fastening or hinge means such. B. provided a ball joint or clevis. One of the rods is adjustably bordered by a thread in the tube, wherein the opposing rod is floating or guided in the tube slidably. to Locking this rod holes are provided in the rod and in the tube, the bores brought into alignment and a locking pin can be inserted through for fixing. Further, an elongated hole is provided on the tube, which is also brought into alignment with the bore in the rod and a locking pin can be inserted through the playful locking, wherein the floating rod limited by the length of the slot, but variable or floating is. As a rule, a distinction is made between two operating states for the stabilizers. In a first operating state, the stabilizers are adjusted such that a substantially fixed stabilizer length is predetermined. The determination or fixation or locking takes place as described by a locking pin which is inserted through the holes provided. In a second operating state of the stabilizer is set such that a limited variable stabilizer length is given, so that a game-driven stabilizer length is given, which allows the stabilized parts, such as. B. the lower links of a three-point hitch, to a certain extent are laterally pivotable. This is, as described above, achieved by the locking pin realized with the locking in connection with the slot.

Such stabilizers are manufactured and sold by CBM SpA, for example (see the brochure "CBM SpA" Programma Produzione ") .The stabilizers are used for the operation with trailer devices of different categories, so that a stabilizer length adjustment is required for a specific category To do this, set the stabilizers as above described, threaded. By radial rotation of the tube relative to the rod, a change in length can be achieved, wherein the tube of the stabilizer must be twisted until the required catechism equitable length of the stabilizer adjusts. This is time consuming and cumbersome, especially if the thread has become dirty and stiff when using the three-point hitch on the field. Furthermore, despite possible length change, the stabilizer always has a defined play tolerance for the second operating state, so that the user is limited in his setting possibilities to changing the length of the stabilizer by turning the same.

The object underlying the invention is seen to provide a stabilizer of the type mentioned by which the above problems are overcome.

The object is achieved by the teaching of claim 1. Further advantageous embodiments and modifications of the invention will become apparent from the dependent claims.

According to the invention, a stabilizer of the aforementioned type is designed such that a further locking device for setting a further operating state with substantially fixed stabilizer length and a further locking device for setting a further operating state with limited variable stabilizer length are provided. This ensures that the length of the stabilizer can be adjusted in a quick and easy manner by setting up the other locking devices can, both in an operating condition with a fixed stabilizer length and in an operating condition with limited variable stabilizer length, without having to adjust the length in a complex and time-consuming manner by turning the housing. By simply loosening the first locking device and setting the other locking device, the stabilizer can be quickly adjusted without much effort and time-saving in a category change of the trailer device.

Preferably, the further locking device for setting a further operating state with a limited variable stabilizer length to the first locking device for setting a first operating state with a limited variable stabilizer length different level of variability. Thus, the stabilizer is automatically provided with a adapted to the new category movement in a category change in its further locking position, in which a floating position is realized, or the stabilizer is in its operating state with limited variable stabilizer length.

The locking devices for setting an operating state with a substantially fixed stabilizer length each comprise a bore introduced on the housing and a common bore introduced on the second rod. About a split pin, a bolt, a bolt, in particular locking pin, which is guided by the mutually aligned holes in the housing and in the second rod, the respective locking positions for operating conditions can be set with substantially fixed stabilizer length for two categories or set up. The holes formed on the housing are each assigned to a specific category, and arranged so that there is a specific stabilizer length for each category.

Preferably, the holes introduced on the housing are arranged offset in the longitudinal direction and / or in the circumferential direction of the housing. It is possible to arrange the holes offset only in the longitudinal direction, whereby different stabilizer lengths can be achieved. However, it is also expedient to arrange the holes offset in the circumferential direction at the same time, so that the assignment of another category is displayed to an operator by turning the housing or the second rod. By displacing the holes in the circumferential direction, it is also possible to avoid overlaps of holes arranged close to one another in the longitudinal direction.

In order to realize an operating state with limited variable stabilizer length arresting devices are provided, each comprising the arrangement of at least one formed on the housing elongated hole, which cooperates with a common, introduced on the second rod bore. Via a split pin, a bolt, a bolt, in particular locking pin, which extends through the common bore on the second rod and through an aligned slot in the housing, the respective locking positions for operating conditions with limited variable stabilizer length for two categories set or set become. Preferably, two slots are provided on the circumference of the housing for a locking device, so that the Splint, or latch, etc. may extend through the housing on both sides. The slots formed on the housing are each assigned to a specific category, and arranged so that for each category a certain degree of variability of the stabilizer length, ie a length of the slot corresponding Verstellspiel or predetermined by the length of the elongated hole floating position results ,

Preferably, the slots of different categories are arranged offset on the housing in the longitudinal direction and / or in the circumferential direction of the housing. As a result, on the one hand the different categories for an operator clearly visible and on the other hand easily adjustable by turning and moving the housing relative to the second rod. Furthermore, by displacing the elongated holes in the circumferential direction, overlaps of the slots are avoided.

In an alternative embodiment, the locking means for adjusting an operating condition with a substantially fixed stabilizer length each comprise a bore introduced at the second rod and a common bore introduced at the housing, in other words, the embodiments of the bores are carried out in opposite directions.

Preferably, also for the same reasons as described above, the bores introduced at the second rod can be offset in the longitudinal direction and / or in the circumferential direction of the second rod.

Furthermore, the locking devices for setting an operating state with limited variable Stabilizer length in the alternative embodiment each comprise a slot introduced at the second rod and a common bore introduced on the housing.

For the same reasons, as already described above, the slots introduced at the second rod may be offset in the longitudinal direction and / or in the circumferential direction of the second rod.

In order to achieve a different degree of variability in the limited variable stabilizer length operating positions for the respective categories, the elongated holes may have different lengths. The different lengths of the slots cause the variability of the stabilizer lengths are limited differently or floating positions are created with different game. For example, a longer slot for the category with longer stabilizer length can be provided and thus a greater movement play, or a floating position with greater variability, created for this category. Of course, the same applies vice versa, namely that a longer slot for the category with a shorter stabilizer length can be provided and thus a greater movement play, or a floating position with greater variability, created for this category.

Preferably, the provided on the rods articulation means are designed as a ball joint or clevis. The stabilizers can thereby be easily attached to existing attachment points of a three-point hitch. Preferably, stabilizers according to the invention are suitable for use on a three-point hitch, wherein the stabilizers preferably between the

Three-point hitch associated lower links and a frame part of an equipped with the Dreipunkanhängevorrichtung agricultural vehicle are arranged.

Reference to the drawing, which shows an embodiment of the invention, the invention and further advantages and advantageous developments and refinements of the invention are described and explained in more detail below.

It shows:

1 is a schematic perspective view of a three-point hitch with stabilizers according to the invention,

FIG. 2 shows a schematic side view of a stabilizer from FIG. 1, FIG.

Fig. 3 is another side view of the stabilizer of Figure 2 and

Fig. 4 is a schematic side view in

Exploded view of a stabilizer in an alternative embodiment.

In Figure 1, a three-point hitch 10 is shown, as for example on agricultural tractors or tractors for attaching a pulled or attached Appliance application finds. The

Three-point hitch 10 comprises a first and second lower link 12, 14, each arranged on one side of the three-point hitch 10 and pivotally hinged to a frame (not shown) of the tractor or tractor.

The lower links 12, 14 are connected to a lifting device 16. The lifting device 16 has hydraulically operated cylinders 18, which are connected via a pivot arm 20 and via lifting struts 22 with the respective lower links 12, 14. About the lifting device 16, the lower links 12, 14 are hydraulically pivoted. The lower links 12, 14 have at their free ends articulation means 24 in the form of ball joints. However, the hinge means can also be designed as a clevis or fishing hooks. The articulation means 24 on the lower links 12, 14 form two of three articulation points of the three-point hitch 10, wherein the articulation means 24 are connected to a frame of an implement to be attached (not shown).

Further, the three-point hitch 10 has a top link 26, the hinge means 28, in the form of a ball joint forms the third of the three pivot points of the three-point hitch 10. Again, the hinge means may be designed as a fishing hook or as a clevis.

The lower links 12, 14 are each connected to a stabilizer 30, 32 which limits lateral movement of the lower links 30, 32. The stabilizer 30, 32 extends between a pivot point 34 on the respective lower link 12, 14 and a pivot point 36 on a frame 38 of the tractor. The stabilizer 30, 32 is shown in detail in Figures 2 and 3. It has a tubular or cylindrical housing 40. The stabilizer 30, 32 includes a first rod 42 and a second rod 44.

The first rod 42 is adjustably connected to the housing 40 via a thread 46 formed on the first rod 42 and in the housing 40. At its free end, the first rod 42 is provided with a ball joint 48, which serves for connecting the stabilizer 30, 32 with the frame 38 of the tractor. In this case, a clevis or another type of connecting means can be selected. By rotating the first rod 42 relative to the housing 40, it can be moved into the housing 40 or out of the housing 40.

The second rod 44 is guided displaceably or telescopically in the housing 40. At its free end, the second rod 44 is provided with a clevis 50, which serves for connecting the stabilizer 30, 32 with the respective lower link 12, 14. In this case, a ball joint or another type of connecting means can be selected.

The second rod 44 is provided with a first bore 52 and a second bore 54, both bores 52, 54 extending at a predetermined distance from one another through the entire cross section of the second rod 44.

The housing 40 is provided with two slot pairs 56, 58, wherein in each case the elongated holes 56 ', 56'',58', 58 '' of a slot pair 56, 58 on the circumference of the housing 40th are arranged opposite one another. The slot pairs 56, 58 are arranged offset to one another, in the longitudinal direction and in the circumferential direction of the housing 40, wherein the slot pairs 56, 58 have different sized slots 56 ', 56'',58', 58 ''. In the example shown in Figures 2 and 3, the slots 56 ', 56''of the slot pair have a shorter length than the slots 58', 58 '' of the slot pair 58. In addition, the slot pair 56 is closer to that of the second rod associated opening 60 of the housing 40 is arranged. Both slot pairs 56, 58 are arranged offset by 90 ° on the circumference of the housing 40, as can be seen from Figures 2 and 3.

The housing 40 is further provided with two pairs of bores 62, 64, wherein in each case the bores 62 ', 62' ', 64', 64 '' of a bore pair 62, 64 according to the slot pairs 56, 58 are arranged on the circumference of the housing 40 opposite one another , The pairs of holes 62, 64 are therefore also arranged offset to one another, in the longitudinal direction and in the circumferential direction of the housing 40, wherein the holes 62 ', 62' ', 64', 64 '' of the pairs of holes 62, 64 may be the same size. In the example shown in FIGS. 2 and 3, the bore pair 62 is arranged closer to the opening 60 of the housing 40 associated with the second rod. Both pairs of bores 62, 64 are offset by 90 ° on the circumference of the housing 40, as can be seen from FIGS. 2 and 3.

The stabilizer 30, 32 is further provided with a split pin 66 which extends through the holes 52, 62 ', 62''and the second rod 44 locked relative to the housing 40. The sapwood 66 is designed as a bolt, which has a Folding bracket 68 is clamped to the housing 40. The bores 52, 54, 62 ', 62 ", 64', 64" and the elongated holes 56 ', 56 ", 58', 58", in each case in conjunction with the split pin 66 and the folding bracket 68 provide a plurality of locking means for the second rod 44 or for the stabilizer 30, 32 represents.

The bores 52, 62 ', 62 ", in conjunction with the cotter pin 66 and the folding bracket 68, constitute a first locking device for setting an operating condition for the stabilizer 30, 32 with a substantially fixed stabilizer length for a particular category of attachment, for example Category 1. The bore 54 and slots 56 ', 56' ', in conjunction with the split pin 66 and lug 68, provide a first locking means for setting an operating condition for the stabilizer 30, 32 of limited variable stabilizer length for the same category of attachment The latter locking device thus makes it possible to set a limited floating position for the second rod 44 within the housing 40, the floating movement being limited by the length of the elongated holes 56 ', 56 ".

The bores 52, 64 ', 64'', in conjunction with the split pin 66 and the folding bracket 68, constitute a second locking device for setting a further operating state for the stabilizer 30, 32 with a substantially fixed stabilizer length for a further category of attachment, for example, for category 2. The bore 54 and the slots 58 ', 58'', in conjunction with the split pin 66 and the flap bracket 68, provide a second locking means for setting a further operating condition for the stabilizer 30, 32 with limited variable stabilizer length for the same category of attachment (category 2). The latter locking device thus also allows the setting of a limited floating position for the second rod 44 within the housing 40, wherein the floating movement is limited by the length of the slots 58 ', 58'', compared to the category 1 associated slots 56', 56 ''sized larger. The category 2 associated locking device with the slots 58 ', 58''allows the second rod 44 thus perform swimming movements with a greater movement play. Due to the fact that the bore pair 62 and slot pair 56 assigned to the first category (category 1) are offset by 90 ° on the circumference of the housing 40 relative to the pair of holes 64 and slot pairs 56 assigned to the second category (category 2), it is possible to release the splint by loosening the splint 66 and turning the second rod 44 relative to the housing 40 by 90 °, and simultaneously moving the first rod 44 relative to the housing 40, are quickly changed from one category to another category. At the same time optimized floating movements for the respective category can be realized because the slots 56 ', 56''of the one category (category 1) with different length compared to the slots 58', 58 '' of the other category (category 2) are formed.

The illustrated in the embodiment

Locking devices are not limited to a particular category and are intended only as an example of a possible execution for different categories. An alternative embodiment is shown in FIG. In this case, the elongated holes 56 ', 56 ", 58', 58" formed on the housing 40 in the preceding example were formed by oblong holes 70, 72 formed in the second rod 44 replaced. Further, in order to provide the same function as the first example locking devices formed on the housing 40 holes 62 ', 62'',64', 64 '' replaced by formed on the second rod holes 74, 76. The previously formed on the second rod 44 holes 52, 54 have been replaced by formed on the housing 40 bore pairs 78, 80. The holes and slots are arranged in an analogous manner offset by 90 ° on the circumference on the second rod 44. This is a comparable functionality as in the example shown in Figures 2 and 3, so that by releasing the pin 66 and twisting the second rod 44 relative to the housing 40 by 90 °, and simultaneously moving the second rod 44 relative to the housing 40th which are adjustable to the different categories associated locking positions, as already described above to Figures 2 and 3, are adjustable. At the same time, optimized floating movements for the respective categories can be realized, since the slot 70 of the one category (category 1) with different length compared to the slot 72 of the other category (category 2) is formed.

Although the invention has been described by way of example only, in light of the foregoing description and the drawings, those skilled in the art will recognize many different alternatives, modifications and variations which are within the scope of the present invention.

Claims

claims

1. stabilizer (30, 32) for a three-point hitch (10), with a cylindrical housing (40), one in

Housing (40) guided first rod (42), a guided in the housing (40) second rod (44), wherein the first rod (42) at one end via a thread (46) adjustably received at a first end of the housing (40) and the second rod (44) is telescopically received in the housing (40) at a second end of the housing (40) and wherein the rods (42, 44) received at the respective end of the housing (40) have hinge means (48, 50) at the other end a first locking means for setting an operating condition with substantially fixed stabilizer length and a first locking means for setting an operating condition with limited variable stabilizer length, characterized in that a further locking means for setting a further operating condition with substantially fixed stabilizer length and a further locking means for setting a further operating state with limited variable stabilis are provided atorlänge.

2. stabilizer (30, 32) according to claim 1, characterized in that the further locking means for setting a further operating state with a limited variable stabilizer length to the first locking means for setting a first Operating state with limited variable stabilizer length has different levels of variability.

3. stabilizer (30, 32) according to claim 1 or 2, characterized in that the locking means for adjusting an operating condition with substantially fixed stabilizer length each introduced at least one housing (40) and a common on the second rod (44) introduced bore (52, 62 ', 62' ', 64', 64 '' (include.

4. stabilizer (30, 32) according to claim 3, characterized in that the housing (40) introduced holes (62 ', 62' ', 64', 64 '') in the longitudinal direction and / or in the circumferential direction of the housing (40 ) are arranged offset.

5. stabilizer (30, 32) according to any one of claims 1 to 4, characterized in that the locking means for adjusting an operating condition with limited variable stabilizer length respectively at least one housing (40) introduced slot (56 ', 56' ', 58' , 58 ") and a common bore (54) formed on the second rod (44).

6. stabilizer (30, 32) according to claim 5, characterized in that the housing (40) introduced slots (56 ', 56'',58', 58 '') in the longitudinal direction and / or in the circumferential direction of the housing (40 ) are arranged offset.

7. stabilizer (30, 32) according to any one of claims 1 to 2, characterized in that the locking means for setting an operating condition with substantially fixed stabilizer length each one on the second rod (44) introduced and at least one common to the housing (40 ) introduced bore

(74, 76, 78).

8. stabilizer (30, 32) according to claim 7, characterized in that the at the second rod (44) introduced holes (74, 76) are arranged offset in the longitudinal direction and / or in the circumferential direction of the second rod (44).

9. stabilizer (30, 32) according to claim 7 or 8, characterized in that the locking means for setting an operating condition with limited variable stabilizer length each on the second rod (44) introduced slot (70, 72) and at least one common to the Housing (40) introduced bore (80).

10. stabilizer (30, 32) according to claim 9, characterized in that on the second rod (44) introduced slots (70, 72) are arranged offset in the longitudinal direction and / or in the circumferential direction of the second rod (44).

11. stabilizer (30, 32) according to one of claims 5 to 10, characterized in that the elongated holes (56 ', 56'',58', 58 '', 70, 72) have different lengths.

12. stabilizer (30, 32) according to any one of the preceding claims, characterized in that the articulation means

(48, 50) are designed as ball joint or clevis.

13. three-point hitch (10) comprising a stabilizer (30, 32) according to any one of the preceding claims.