EP2829662B1 - Front loader assembly - Google Patents

Description

The invention relates to a front loader assembly, comprising a console, an attachable to an upper and a lower bearing point of the bracket cultivation boom, a hinged with a first pivot pin mounted on the loader loader, one with a second pivot pin mounted on the articulated loader and a locking device for locking the Attachment with the console.

Front loader arrangements are known. They usually include a mounting bracket or a mounting frame, which is mounted on both sides of a carrier vehicle, such as a tractor, and a front loader with loader swing, which is mounted on both sides of the carrier vehicle via a corresponding with the corresponding mounting bracket cultivation branch to this. The assembly takes place via bearing points on the mounting bracket on which the cultivation branch is mounted and with which it is connected lockable. For parking or parking the front loader parking supports or loader supports are provided on this usually parking, for example, by a pivoting mechanism can be moved or positioned so that the front loader is securely supported when parking. Since the mounting and dismounting of the front loader can be associated with considerable operating effort, proposals have been made with which the attachment and / or dismantling process of the front loader was increasingly automated and thus could be simplified.

Such a front loader arrangement discloses, for example, the EP 1 593 781 A2 , It discloses a front loader for a tractor with mounting bracket, loader arm and loader support, the loader support is pivotally mounted on a mounting load of the front loader and by the pivoting movement, the cultivation branch when attaching and / or dismantling the front loader to the attachment console, either swiveled towards the loader swingarm or swung away from the loader swingarm. Further, a locking of the attached front loader is provided at the free end of the loader support in the pivoted state by fixing the same with a front part of the vehicle frame, so that by the locking of the loader support also a fixation of the add-on to the mounting bracket is achieved. A disadvantage is that the locking on the one hand to the driver's cab remote location on the vehicle frame, and thus in particular unlocking, if not automatically realized, is time-consuming, and on the other hand for the driver is poor or not visible, especially if one correct locking is done. The lock is further adapted only to an angle determined in the parking position between the loader support and attachment load. There are therefore new hires to make on the cultivation branch, if, for example, change in a change of the front loader tool, the geometric conditions, in particular the angle between the loader support and add-on load. This is achieved here by an elaborate adjusting device which is arranged between the loader support and the cultivation branch.

A comparable front loader arrangement will be described in EP 2 042 660 A2 disclosed. Again, a similar complex locking solution is applied with the disadvantages mentioned.

The US 7,168,907 B2 also discloses a front loader arrangement of the type mentioned, but with a locking device which is directly in engagement with the mounting bracket or directly the connection between the cultivation branch and mounting bracket locked. The loader support used here is formed in contrast to the above examples rigidly in the form of a mounted on the Anbaumast tube frame, which is lowered to the ground as soon as the cultivation branch with respect to the mounting bracket when dismantling the front loader tilts forward. This solution may be suitable for smaller front loader models with small, compact and relatively short loader supports. For larger and heavier front loader arrangements, higher support forces and therefore more stable loader supports with optionally also other carrier profile structures and larger dimensions are required for static reasons alone. However, this does not change that for an operating position as well as for a parking position, geometric specifications must be complied with on the front loader, which is why a pivotable arrangement of the loader support is often desirable if not even necessary.

The object underlying the invention is seen to provide a front loader arrangement of the type mentioned, by which the aforementioned problems are overcome. In particular, a front loader assembly is to be created, which combines the advantages of locking the add-on load on the mounting bracket with a pivotally mounted on the Anchor loader loader support.

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 front loader arrangement of the aforementioned type is designed such that the Locking device is arranged on the loader support, a pivot bolt which is mounted on a arranged on the loader support third pivot pin, a biasing device which biases the pivot bolt in response to its pivotal position relative to the loader support in an open position or in a closed position, and on the attachment branch arranged and engageable with the pivot bolt engaging means comprises, with which the pivot bolt, by pivoting the loader support relative to the cultivation load in its preloaded closed position is movable, wherein the pivot bolt in its closed position by pivoting the Anbaumasts against the console to the lower bearing with the upper bearing point of the mounting bracket under bias is engageable. By the front loader assembly according to the invention, it is possible to lock the front loader to the console, so that an operator also has the opportunity to observe a proper interlocking from an operator platform or cabin. Furthermore, it can, without having to go long distances, locally press the lock for a degradation process and spend the pivot bolt from the closed position to the open position, for example by pressing the foot. Of course, this can also be done by manual operation. Due to the pivotable arrangement of the loader support on the add-on load and the arrangement of the locking device on the loader support the locking device of a guided on the front loader tool is independent, so that regardless of a setting between the loader support and Anbaumast in the parking position angle, no adjustments to be made on the cultivation branch, if, for example, change the geometric conditions when changing the front loader tool. An elaborate one Adjustment device, which is arranged between the loader support and add-on load, is eliminated. Furthermore, the loader support used here can be made robust and is pivotally mounted on the Anbaumast so that even heavier front loader can be safely parked. Due to the bias of the pivot bolt and the same arrangement on the loader support and the arrangement of the actuating means on the mounting post, the locking element can be controlled solely by Schwenkrelativbewegungen between add-on load and loader support, creating opportunities for a semi-automatic coupling and locking of the front loader and thus a more user-friendly operation of the entire front loader result.

An actuator for raising and lowering the loader rocker is arranged between the loader support and the loader rocker, wherein the actuator is connected via a pivot pin pivotally connected to the loader support. This makes it possible for the loader support to pivot when the pivoting bolt is open by actuating the actuator, in particular when the attachment load is removed from the console, that is, the front loader assembly is brought into a parked position. The loader arm supports itself on the ground, so that the actuator can swing out the loader support. Due to the pivotal mounting of the loader support on the add-on load and the pivotal mounting of the add-on load on the lower bearing point, both the loader support relative to the add-on load and the add-on load can be pivoted about the lower bearing point on the console with open pivot bolt and operating the actuator.

By pivoting the loader support against the cultivation branch is the adjusting means with a Swivel latch engageable and the pivot bolt from a biased open position into a preloaded closed position movable. After the open pivot bolt, which was brought for a degradation process from its biased closed position to its open position (open position), the locking of the add-on load on the console is canceled, so that the cultivation branch is pivoted relative to the console to the lower bearing, as soon as the actuator actuated becomes. At the same time the loader support is pivoted relative to the cultivation branch, so that there is a pivot relative movement between the loader support and cultivation load. In this case, the adjusting means is guided against the pivot bolt, so that the pivot bolt is placed in a pivoting movement relative to the loader support and the pivot bolt is moved out of its biased opening position back into its preloaded closed position.

The adjusting means comprises an adjusting bolt arranged parallel to the third pivot pin on the attachment branch. The adjusting bolt extends from the add-on load by a trained on the loader support first arcuate elongated hole. The third pivot pin extends through a formed on the mounting branch second arcuate elongated hole, so that the loader support is pivotable only in the region of a limited by the first and second arcuate slot bore pivot angle relative to the Anbaumast. Such an arrangement causes pivoting of the add-on to the console by pressing the actuator or by swinging out the loader support can be done so that add-on boom and loader bracket are pivoted together so that on the one hand, the loader support is always pivoted to the ground, at the same time the cultivation load is tilted forward until finally the cultivation load is released from the lower bearing and lifted. The front loader assembly is now in the park position in which it is supported on the one hand on a front end of the loader arm or a front loader tool located thereon and on the other hand on the loader support.

The pivot bolt comprises a hook-shaped configuration which can be brought into engagement with the upper bearing point. In particular, the pivot bolt is formed such that it surrounds the formed by a cylindrical pin journal upper bearing at least partially positively. It is also conceivable here to provide a square cross-section pin as upper bearing point, so that the pivot pin can have a rather angular hook shape.

The biasing means comprises a tensioning element which is connected at one end to a lever arm formed on the pivoting bolt and at the other end to the loading support, the connection point to the lever arm being arranged between the connection point to the loading support and the third pivoting bolt. As a result, it can be ensured that, depending on the pivoting position of the pivoting bolt, a pretensioning in the clockwise direction around the third pivoting bolt or in the counterclockwise direction can result. The lever arm, the pivot bolt, the third pivot pin, the upper bearing point and the adjusting bolt are designed and aligned with each other such that the pivot bolt is biased by the clamping element in an open position after it has released the upper bearing and is biased into a closed position, after this with the adjusting bolt in Intervention was brought. The clamping element may be formed for example by a torsion spring.

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.

Fig. 1

eine perspektivische Seitenansicht einer Konsole mit einem Anbaumast einer erfindungsgemäßen Frontladeranordnung,

Fig. 2

eine perspektivische Seitenansicht des Anbaumasts mit daran angelenkter Laderschwinge und Laderstütze,

Fig. 3

eine vergrößerte Seitenansicht des Anbaumasts mit Laderstütze mit daran angeordneter Verriegelungseinrichtung in einer vorgespannten Schließstellung bei angebauter Frontladeranordnung,

Fig. 4

eine vergrößerte Seitenansicht der Verriegelungseinrichtung in einer vorgespannten Öffnungsstellung bei angebauter Frontladeranordnung,

Fig. 5

eine vergrößerte Seitenansicht der Verriegelungseinrichtung in einer vorgespannten Schließstellung bei abgebauter Frontladeranordnung,

Fig. 6

eine Seitenansicht der Frontladeranordnung im angebauten Zustand mit der Verriegelungseinrichtung in einer vorgespannten Schließstellung,

Fig. 7

eine Seitenansicht der Frontladeranordnung zu Beginn eines Abbauvorgangs mit der Verriegelungseinrichtung in einer vorgespannten Öffnungsstellung,

Fig. 8

eine Seitenansicht der Frontladeranordnung zum Ende des Abbauvorgangs mit der Verriegelungseinrichtung in einer vorgespannten Schließstellung und

Fig. 9

eine Seitenansicht der Frontladeranordnung zum Ende eines Anbauvorgangs mit der Verriegelungseinrichtung in einer vorgespannten Schließstellung.

It shows:

Fig. 1

a perspective side view of a console with a mounting post of a front loader assembly according to the invention,

Fig. 2

a perspective side view of the add-on with articulated loader rocker and loader support,

Fig. 3

an enlarged side view of the add-on with Laderstütze with arranged thereon locking device in a preloaded closed position with attached front loader assembly,

Fig. 4

an enlarged side view of the locking device in a preloaded open position with attached front loader assembly,

Fig. 5

an enlarged side view of the locking device in a prestressed Closed position with dismounted front loader arrangement,

Fig. 6

a side view of the front loader assembly in the mounted state with the locking device in a biased closed position,

Fig. 7

a side view of the front loader assembly at the beginning of a mining operation with the locking device in a preloaded open position,

Fig. 8

a side view of the front loader assembly at the end of the mining operation with the locking device in a biased closed position and

Fig. 9

a side view of the front loader assembly to the end of an attachment operation with the locking device in a biased closed position.

A front loader assembly 10 according to the invention is commonly used on tractors, tractors or similar agricultural vehicles of smaller design. However, such a front loader assembly 10 can also be used in larger agricultural vehicles or in construction machinery. The following is limited to the representation of components of the front loader assembly 10, which is mounted with front loader assembly 10 on the front right side of a tractor or tractor are located or attached there. Such an arrangement of components on the left side of a tractor is correspondingly in a reversed design and is also part of the front loader assembly 10 shown here. The directional information used below refers to the longitudinal direction of a tractor or to the longitudinal direction of a mounted on the tractor front loader assembly 10, wherein the front loader assembly 10th is attachable to the longitudinally forward side of the tractor and extending in the forward direction of the tractor.

FIG. 1 shows a console 12 and a mounting post 14 of said front loader assembly 10. The console 12 includes a laterally of a tractor transversely extending support tube 16 which is attachable via a connecting flange 18 to the frame 20 of a tractor (not shown), as well as a from the support tube 16 vertically extending connecting plate 22. On the connecting plate 22 transversely extending upper and lower bearing pins 24, 26 or bushings are formed, which form a konsole-side part of an upper bearing 28 and a lower bearing 30. The mounting post 14 includes an inner and an outer mounting plate 32, 34, which are arranged parallel to each other and extend vertically above the lower bearing 30. The mounting plates 32, 34 are connected to each other via a plurality of transversely extending connecting webs 36 spaced from each other. At the lower ends of the mounting plates 32, 34 each recesses 38 are formed, which form the add-on part of the lower bearing 30 and serve as a bearing seat or receptacle for the lower bearing pin 26. Above the recesses 38 are on the inside of the mounting plates 32, 34 bearing pockets 40 are formed, which are the onbaumastseitigen part of the upper Form bearing 28 and serve as a bearing seat or receptacle for the upper bearing pin 24.

As further in FIG. 1 can be seen, 34 bushings 42 for receiving a pivot pin 44 are formed at an upper end of the mounting plates 32, (see FIG. 2 ). Between the bearing bushes 42 and the bearing pockets 40 40 further bearing bushes 46 are formed for receiving a further pivot pin 48 in a central region of the mounting plates 32, 34 above the bearing pockets. About the pivot pin 44 is a loader rocker 50 of the front loader assembly 10 is pivotally mounted at its rear end on the mounting post 14. About the pivot pin 48, a loader support 52 of the front loader assembly 10 is pivotally mounted at its rear upper end on the Anbaumast 14.

Between loader support 52 and loader rocker 50 extends an actuator 54 in the form of a hydraulic cylinder. The actuator 54 is also pivotally connected at one end via a pivot pin 55 with the loader support 52 and at another end via a pivot pin 56 with the loader rocker 50. By extending or retracting the actuator 54, a pivoting of the loader rocker 50 relative to the loader support 52 can thus be made possible and thus the position of the loader support 52 to the loader rocker 50 can be varied.

At a rear lower end of the loader support 52, a further pivot pin 58 is arranged, which is fixedly attached to the loader support 50 and extending in the transverse direction by a trained on the Anbaumast 14 and the mounting plates arcuate slot 60 hole. The arcuate elongated hole 60 is formed to be extends arcuately along a circular section path around the pivot pin 48. The interaction between the pivot pin 58 and the arcuate elongated hole 60 thus pivotal movement of the loader support 52 is limited to the other pivot pin 48 of the loader support 52 so that pivoting of the loader support 52 relative to the mounting post 14 only within the arcuate guide of the pivot pin 58 within the elongated hole 60 is made possible.

Between the mounting plates 32, 34, a pivot bolt 62 is mounted on the pivot pin 58. The pivot bolt 62 comprises a hook-shaped configuration in the form of a hook-shaped gripper arm 64, which extends from the pivot pin 58 in the backward and upward direction or with attached front loader assembly 10 extends in the direction of the upper bearing pin 24 and this engages in a closed position. Further, the pivot latch 62 includes a control arm 66 which extends from the pivot pin 58 and forms a lever arm about the pivot pin 58. The control arm 66 is connected via a clamping element 68 in the form of a leg spring 70 with the loader support 52, wherein the leg spring 70 with its one leg 72 at a connection point 73 at the free end of the control arm 66 and with its other leg 74 at a connection point 75 at the Laderstütze 52 is pivotally mounted in each case. By changing the position of the connection point 73 relative to the pivot pin 58 and the connection point 75, the direction of the biasing force of the clamping element 68 changes. The pivot bolt 62 is thus biased into the closed position as soon as the connection point 73 in front of an imaginary connecting line between a circle center 76 of Pivot pin 58 and second connection point 75 is located (see Figures 3 and 5 ).

The other way round, the pivoting latch 62 is biased to the open position as soon as the connection point 73 is behind said imaginary connecting line between the circle center 76 of the pivot pin 58 and the second connection point 75 (see FIG FIG. 4 ).

On add-on branch 14, an adjusting means in the form of an adjusting bolt extending between the mounting plates 32, 34 is further formed, which fixed above the pivot pin 58 fixed to the Anbaumast 14. The adjusting bolt 78 extends in the transverse direction through the loader support 52. On the loader support 52 arcuate elongated holes 80 are introduced, through which the adjusting bolt 78 extends so that the adjusting bolt 78, when pivoting the loader support 52 relative to the Anbaumast 14, in the context of curved slot bores 80 can move.

For releasing the front loader assembly 10, a projection 82 is provided on the upper side of the hook-shaped gripping arm 64, which serves as a gripping or actuating point to the pivot bolt 62 from its closed position (see FIG. 3 ) in its open position (see FIG. 4 ) to pry. The actuation of the pivot bolt 62 can for example be done directly by hand or foot. An actuation by an actuator, be it electrically or hydraulically, is conceivable.

By actuating the pivoting bolt 62, this is moved from its closed position (FIG. FIG. 3 ) pivoted into its open position ( FIG. 4 ). In the open position, the front loader assembly 10 can be released from the console 12 by the actuator 54 is extended and the mounting post 14 about the pivot pin 26 pivoting forward. According to the arrangement of Laderstütze 52 moves this downward at the same time, so that with increasing extension of the actuator 54 on the one hand, the inclination angle of the add-on 14 relative to the console 12 and the other the position of the loader support 52 to the loader arm 50 is changed, with the loader support 52 increasingly downward moved towards the ground contact surface.

When pivoting the loader support 52 moves downward, according to the arrangement of the adjusting bolt 78, the pivot bolt 62 mounted on the pivot bolt 62 on the adjusting bolt 78 until the pivot bolt 62 engages with the pivot pin 78 and the attachment pin 14 fixedly arranged adjusting bolt 78th the pivot bolt 62 from its biased open position (see FIG. 4 ) forces it into the preloaded closed position (see FIG. 5 ).

In the front region of the loader support 52, a cross-brace 84 is arranged, with which the loader support 52 is held with attached front loader assembly 10 to a formed at the front end of the frame 20 receptacle 86 (see FIG. 6 ). With release of the front loader device 10 and the beginning of Nachvorneschwenkens the add-on 14 (see FIG. 7 by extending the actuator 54, the loader support 52 is also moved slightly forward, so that the crossbar 84 moves out of the receptacle 86 and the loader support 52 is moved in a downward movement and moves downwards in the direction of ground contact surface. With increasing lowering of the loader support 52 and the pivot bolt 62 moves to the adjusting bolt 78 and is brought by this again in a biased closed position (see FIG. 8 ). The loader support 52 reaches the ground contact patch and supports the front loader assembly 10 on the ground, so that they in a Parking position is spent. The attachment load 14 is thereby adjusted by the loader support 52, that the lower bearing pin 26 are exposed and the front loader assembly 10 from the vehicle (tractor, tractor) can be removed.

The attachment of the front loader assembly 10 is reversed, that is, the vehicle is brought to the front loader assembly 10 in the mounted position and the actuator 54 is retracted. The attachment load 14 is placed on the lower bearing pin 26. With increasing retraction of the actuator 54 of the cultivation load 14 is increasingly pivoted in the direction of the upper bearing pin 24, wherein the already located in the pretensioned closed position pivot bolt 62 engages the upper bearing pin 24 in engagement (see FIG. 9 ) and is lifted by this, until finally the hook-shaped gripping arm 64 engages around the upper bearing pin 24 and this includes or the front loader assembly 10 is locked. At the same time the loader support 52 is raised (see FIG. 9 ) and retracted into the receptacle 86 on the frame 20 of the vehicle.

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 (6)

1. Front loader arrangement (10) comprising a bracket (12), a mounting mast (14) which is able to be mounted on an upper bearing and on a lower bearing (28, 30) of the bracket (12), a loader arm (50) which is articulated to a first pivot pin (44) arranged on the mounting mast (14), a loader support (52) articulated to a second pivot pin (48) arranged on the mounting mast (14), and a locking device for locking the mounting mast (14) to the bracket (12), characterized in that the locking device is arranged on the loader support (52), said locking device comprises a pivoting locking bar (62) which is mounted on a third pivot pin (58) arranged on the loader support (52), a pretensioning device which pretensions the pivoting locking bar (62) depending on its pivoted position relative to the loader support (52) into an open position or into a closed position, and an adjusting means arranged on the mounting mast (14) and able to be brought into engagement with the pivoting locking bar (62), by which the pivoting locking bar (62) is able to be moved into the pretensioned closed position, wherein by pivoting the mounting mast (14) relative to the bracket (12) about the lower bearing (30), the pivoting locking bar (62) in its closed position is able to be brought into engagement with the upper bearing (28) of the bracket (12) by pretensioning.
2. Front loader arrangement (10) according to Claim 1, characterized in that an actuator (54) for lifting and lowering the loader arm (50) is arranged between the loader support (52) and the loader arm (50), wherein the actuator (54) is pivotably connected to the loader support (52) via a pivot pin (55).
3. Front loader arrangement (10) according to Claim 1 or 2, characterized in that by pivoting the loader support (52) relative to the mounting mast (14) during a dismantling process the adjusting means is able to be brought into engagement with the pivoting locking bar (62) and the pivoting locking bar (62) is able to be moved from a pretensioned open position into a pretensioned closed position.
4. Front loader arrangement (10) according to one of Claims 1 to 3, characterized in that the adjusting means comprises an adjusting pin (78) arranged on the mounting mast (14) parallel to the third pivot pin (58), said adjusting pin extending from the mounting mast (14) through a first arcuate slot (80) configured on the loader support (52), and the third pivot pin (58) extends through a second arcuate slot (60) configured on the mounting mast (14), so that the loader support (52) is pivotable relative to the mounting mast (14) in the region of a pivot angle limited by the first and second arcuate slots (80, 60).
5. Front loader arrangement (10) according to one of the preceding claims, characterized in that the pivoting locking bar (62) has a hook-shaped design which is able to be brought into engagement with the upper bearing (28).
6. Front loader arrangement (10) according to one of the preceding claims, characterized in that the pretensioning device comprises a tensioning element (68) which at one end is connected to a lever arm configured on the pivoting locking bar (62) and at the other end is connected to the loader support (52), wherein a connecting point (73) on the lever arm is arranged between a connecting point (75) on the loader support (52) and the third pivot pin (58).

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