AT502917B1 - HARVESTER - Google Patents

Description

2 AT 502 917B1

The present invention relates to a harvesting machine, in particular a loader wagon, comprising a cutter having a plurality of knives releasably secured to a cutter bar by means of locking elements which are tensionable by locking springs into their knife locking position, the cutter bar between a working position in which the blades protrude into a conveyor channel, and a non-working position, in which the blades are removed from the conveyor channel is movably mounted, wherein on the cutter bar a spring carrier movable between a locking position in which the locking springs in their locking the knife Position are clamped, and a non-locking position in which the locking springs allow release of the locking elements is mounted, that said spring carrier is coupled by a coupling with the frame part, which in the working position of the cutter bar the spring carrier in its lock and, in the non-working position of the cutter bar, does not force said spring carrier into its locked position, i. also allows the non-locking position.

Such a harvester in the form of a loading wagon is known for example from DE 297 15 951 U1 or DE 197 06 429 C1. In such loader wagons usually the crop is conveyed by a conveyor and cutting rotor through a conveyor channel, can be introduced into the cutting of the crop knife. The knife-carrying cutter bar can be moved from its working position on the conveyor channel, in which the blades protrude through slots in the conveyor channel in the conveyor channel, away from the conveyor channel in a non-working position in which the blades are removed from the conveyor channel, which For example, the assembly and maintenance of the individual knives, the removal of a blockage or simply serve only the inclusion of crop, which should not be cut. It can be moved out by the central movement of the cutter bar all the knives all at once or with a split design of the cutter bar a knife group, which of course is more useful than a single expansion of the knife. To allow rapid removal of individual knives, the knives can be locked and unlocked on the knife bar by means of movable locking elements. As the aforementioned document DE 297 15 951 U1 shows, while the knives can be hung with its one end to a knife axis and locked at its opposite end by a locking lever in the pivoted position. These locking levers are usually biased by locking springs in their locking position, so that the knives are securely held in their intended position on the cutter bar. In order to remove the knife in the swung-out non-working position of the cutter bar, the locking lever against the spring preload must be moved out of its locked position to release the knife. For this purpose, the spring preload is overcome and also overcome a certain seizure of the catch.

It would be desirable if the locking of the knives on the knife bar would be automatically released when the knife bar is moved to its non-working position for knife replacement or replacement in which the knives are removed from the feed channel. As a result, an annoying unlocking of the locking elements could be saved, which can often be accomplished only with great force application. On the other hand, an automatic unlocking, which automatically unlocks the knife with each swinging out of the cutter bar, would not be appropriate because the cutter bar is sometimes swung out in its non-working position, then without replacing the knife in this position or to remove the cutter bar. For example, the cutter is briefly moved out when clogging occurs to eliminate the blockage of the conveyor channel. Even if only the knives are to be checked or cleaned, it is not expedient to unlock the knives equal to the knife bar when the knife bar is moved to its non-working position.

Furthermore, DE 19707662 A1 describes a loader wagon with a swing-out 3 AT 502 917 B1

Cutter, The hydraulic cylinder provided for swinging out has a travel beyond the fully swung out position of the cutter bar, which allows springs to be released, the latching levers for locking the blades otherwise being biased. However, without elaborate control of the Zylinderstellwegs takes place automatically an automatic release of the knife lock, resulting in the above disadvantages.

On this basis, the present invention has the object to provide an improved harvester of the type mentioned, which avoids the disadvantages of the prior art and further develops the latter in an advantageous manner. Preferably, when the cutting unit is swung out to its non-working position, unlocking of the knives should only be effected automatically if this is actually desired, i. The cutting unit should be able to be moved out of the knife bar either with automatic unlocking and without automatic unlocking of the knives.

This object is achieved by a harvester according to claim 1. Preferred embodiments of the invention are the subject of the dependent claims.

It is therefore proposed to give the locking springs a relatively movable to the cutter bar pivot point and to tap via a coupling device occurring during retraction or retraction of the cutting relative movement between the cutter bar and a frame member and convert it into a corresponding movement of Federanlenkpunktes, so that when moving out of Automatic relief of the locking springs and an automatic clamping of the locking springs is achieved when moving in the cutting unit. The displaceability of the articulation point of the locking springs is advantageously lockable to prevent accidental unloading of the locking springs when moving out of the cutting unit. According to the invention it is provided that a spring carrier lock is provided with a movable latch, by which the spring carrier can be locked in its locking position on the cutter bar. This spring carrier lock creates two options for moving out the cutting unit. Is fixed before moving out the spring carrier in its locking springs exciting locking position, the locking springs do not relax when moving out of the cutting unit, i. they are still held in their cocked position by the spring carrier, so that the knives remain locked to the cutter bar even when the cutter bar is moved out. However, if the spring carrier lock is released before moving out of the cutting unit, the spring carrier can move relative to the cutter bar when moving out and thereby relax the locking springs, so that in the retracted non-working position easy release and removal of the knife is possible. In any case, when re-retracting the cutting unit, the coupling between the spring carrier and the machine frame ensures that the spring carrier is again in its locking position exciting the locking position when reaching the retracted position.

Inasmuch as the said selection option for the mobility of the spring carrier when moving out of the cutting unit is given, the aforementioned coupling does not rigidly couple the spring carrier to the machine or press pipe, but allows a corresponding movement. In particular, the coupling can be designed such that, depending on the desired unlocking or non-unlocking, a change of the articulation point of the spring carrier on the coupling and the articulation point of the coupling on the machine or press frame is possible. This could be achieved for example by a telescopic design of the coupling. In a further development of the invention, however, the coupling is articulated longitudinally displaceable on the spring carrier and / or on the frame part. In particular, the coupling on the spring carrier and / or on the frame part can have a slot fastening, so that the coupling is limited in length displaceable on the spring carrier and / or the frame part. One end of the slot defines the stop, which forces the spring carrier in the working position of the cutter bar in its locking position. The other end of the slot is sufficiently spaced to allow for relative movement as it moves out of the cutting unit during non-unlocking.

In a further development of the invention, the cutter bar is pivotally mounted about a horizontal knife beam pivot axis on the machine or press frame, wherein advantageously the pivot axis can be arranged at the front portion of the cutter bar below the conveyor channel, so that the cutter bar obliquely back down from the conveyor channel, in particular the Förderkanalrückwand, can be swung away. It is understood, however, that other arrangements are possible. Preferably, the coupling, which picks up the relative movement between the cutter bar and the frame and converts it into a clamping movement of the spring carrier, is likewise pivotably articulated to the frame, advantageously around a pivot axis parallel to the cutter bar pivot axis. Here, in the invention, the articulation point of the coupling on the frame of the knife bar pivot axis spaced, so that a relative movement during pivoting of the cutter bar is formed, which can be implemented in the clamping movement of the spring carrier. Of course, different positions can be selected for the articulation point of the coupling on the frame. According to an advantageous embodiment of the invention, the coupling can be articulated in particular above the cutter bar pivot axis, so that when Nachun-tenschwenken the cutter bar, the distance of Koppelanlenkpunktes extended to the frame of the spring carrier and this can be moved forward relative to the cutter bar.

Said spring carrier is also pivotally mounted in a further development of the invention on the cutter bar about a spring carrier pivot axis, wherein the spring carrier pivot axis preferably extends parallel to the cutter bar pivot axis.

In particular, the spring carrier may be articulated on one side of the knife bar opposite the knife bar pivot axis. If the cutter bar is hinged at one end to the machine or press frame, it carries with its other end the spring carrier, which is hinged there pivotally.

By the spring carrier lock advantageously the pivoting of the spring carrier relative to the cutter bar can be locked. According to an advantageous embodiment of the invention, the spring carrier lock may consist of a pivotable latch which is mounted on the cutter bar and engageable with the spring carrier or mounted on the spring carrier and engageable with the cutter bar.

The locking elements for locking the knives on the cutter bar can in principle be designed differently. According to an advantageous embodiment of the invention, the locking elements form pivotable locking lever, which can be pivotally mounted on the cutter bar about a Rasthebelschwenkachse and can be brought into engagement with a latching contour on the knives. The locking springs advantageously engage with a detent lever portion spaced from the detent lever pivot axis. Preferably, all locking levers are pivotable about coaxial locking lever pivot axes or a common latch lever pivot axis.

In particular, the knives can be placed in a knife receptacle with one contour section opposite the catch contour and locked by snapping in the latching lever. Preferably, the knives, each with a bearing recess at a knife end on a knife pivot axis can be placed so that they can be pivoted about said blade pivot axis, in particular to the locking lever. At an opposite end of the pivot axis, the blades can in particular have a detent recess or a depression into which the detent lever can snap when the knives are accurately placed. 5 AT502 917 B1

Said knife pivot axis and / or the latch lever pivot axis can advantageously be aligned parallel to the pivot axis of the spring carrier, wherein preferably the latch lever pivot axis between the knife pivot axis and the spring carrier pivot axis.

In order to facilitate the release of Verriegeiungselemente, can be provided in the invention on the cutter bar Verriegelungsausheber through which the locking engagement between the blades and the locking elements can be at least partially solved. In particular, can be easily lifted out of the detent recess on the knife by the Verriegelungsausheber the aforementioned locking lever, so that the locking lever while still holding the knife, but no longer sit firmly in the detent recess. This allows the knives to be taken out easily, nevertheless they are still held.

As Verriegelungsausheber may be provided in a further development of the invention, a shift shaft which is rotatably mounted on the cutter bar and has a cam-like engagement surface, by means of which a movement of the locking elements can be generated by rotating the shift shaft. Preferably, said shift shaft extends approximately parallel to the knife pivot axis and / or the latch lever pivot axis, so that the shift shaft can cause by rotation a movement of the latching lever relative to the blades or vice versa.

In a further development of the invention, said locking lifter is preferably actuated automatically as a function of the position of the spring carrier. The Schaitwelle may be connected by a switching shaft coupling with said spring carrier, so that a movement of the spring carrier is converted into a movement of the switching shaft. If the spring carrier moves into its non-locking position, in which the locking springs relax, the selector shaft is automatically turned into its release position so that the detent levers are lifted out of the detent recesses on the knives.

In a further development of the invention, the spring carrier can be locked not only in its locking position on the machine frame, but also be held on the coupling in a position that leads to a forced movement of the spring carrier in its non-locking position when moving out of the cutting unit. In particular, this may be provided a spring carrier holder, by which the freewheel of the coupling can be locked to the spring carrier and / or on the machine frame. If the coupling is guided over a slot on the spring carrier, said spring carrier can form a pivot lever, by which the freewheel is locked in said slot.

In a further development of the invention, said spring carrier is actuated in dependence on the position of the spring carrier lock. In particular, a coupling between the spring carrier holder and the spring carrier lock can be provided to the effect that the spring carrier holder can not be brought into its fixing position when the spring carrier lock is released. uiö crfinduny is explained in more detail below with reference to a preferred exemplary embodiment of the drawings. In the drawings: jinrj 7j ipohäri

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1 is a schematic side view of a harvester in the form of a loading wagon, which is pulled by a tractor,

2 is a perspective view of the cutting unit of the loading wagon of FIG. 1 in its retracted working position, FIG.

3 shows a schematic side view of the cutting unit from FIG. 2 in the retracted working position, FIG.

Fig. 4 is a schematic view of the cutting unit of the loading wagon of Fig. 1 in its extended non-working position, the blades of the cutting unit on the 6 AT 502 917 B1

Knife bars have remained locked,

5 shows a schematic side view of the cutting unit from FIG. 4 in its extended non-working position with knives remaining locked;

Fig. 6 is a schematic side view of the cutting unit of the loading wagon of Fig. 1 similar to the representation of FIG. 3 in the retracted working position, wherein the spring carrier, which biases the locking lever for knife locking or angeienkte feathers is unlocked to when in FIG 7 extension of the cutting unit to allow a release of the knife lock,

Fig. 7 is a perspective view of the cutting unit of the loading wagon of Fig. 1 in its extended non-working position in a view similar to Fig. 4, with the locking of the blades of the cutting unit being released, and Fig. 8 is a side view of the cutting unit of Fig 7 with released locking levers for knife locking.

In the drawings, a loader 1 is shown as a harvester, which is pulled and controlled by a tractor 2. The loader wagon 1 comprises a sinkable and liftable pick-up 3 with a spiked roller for picking up crops lying on the ground in a manner known per se. A conveying device 4 with a conveying channel 5 is subsequently provided on the named pick-up or receiving device 3, through which the picked crop is conveyed into the loading storage 6 of the loading wagon, for example with the aid of a conveying and cutting rotor.

As FIGS. 2 to 8 show, the conveying channel 5 is assigned a cutting unit 7, which has a plurality of knives 8, which are arranged in a row next to one another parallel to one another. The knives 8 are arranged on a knife bar 9 which extends transversely to the conveying direction of the conveying device 4 along the conveying channel 5, cf. FIG. 2. In the region of the cutting unit 7, the conveying channel 5 is delimited by a conveying channel wall 10, which has slots 11 pointing in the conveying direction, through which the knives 8 can be inserted into the conveying channel 5, cf. FIG. 4. The knife bar 9 extends on the outside of the conveyor channel wall 10 and is approximately - roughly speaking - pivoted on the bottom of the conveyor channel 5 on the machine frame 12. The knife bar 8 is pivotally connected at its end facing the conveyor channel 5 to the machine frame 12 which surrounds the conveyor channel 5 (does not have to be without swivel frame), the knife bar pivot axis 13 being approximately horizontal transversely to the conveying direction in the conveyor channel 5 extends. The knife bar 11 is pivotable about said pivot axis 13 by a power-operated actuator 14 in the form of a hydraulic cylinder 15, so that the knife 8 and thus the cutting unit 7 between its working position according to Figure 2, in which the blades 8 protrude into the conveyor channel 5, and its non-working position according to Figure 4, in which the blades are moved out of the conveyor channel 5, can be pivoted. Instead of a power-operated power lift could possibly also be provided a manual swivel mechanism.

As Figure 3 shows, the blades 8 are mounted with its front end in a blade receptacle 16 on the cutter bar 9, wherein in the illustrated embodiment, the blade receptacle 16 comprises a knife pivot axis 17, on which the knife 8 can be mounted with a receiving recess, so that they can be pivoted about said knife pivot axis 17. Said knife pivot axis 17 extends approximately horizontally transversely to the conveyor device through the conveyor channel 5 and thus substantially parallel to the aforementioned cutter bar pivot axis 13.

The said knives 8 can be locked by latching levers 18 which can engage in a latching recess 19 provided there at a rear end of the knives 8 and thus block the pivotability of the knives 8 about the knife pivot axis 17. The mentioned detent recess 19 can be clearly seen in FIG. 7 AT 502 917 B1

The latching levers 18 are pivoted on the cutter bar 9 about a latch lever pivot axis 20, which extends substantially horizontally transversely to the conveying direction in the conveyor channel 5 and thus approximately parallel to the aforementioned knife pivot axis 17.

As Figure 3 shows, the locking lever 18 are biased by locking springs 34 in their locking the knife 8 position, so that the locking lever 18 press firmly into the locking recesses 19. In the illustrated embodiment, the locking springs 34 tension springs.

The said locking springs 34 are mounted with their locking levers 18 facing away from ends on a common spring carrier 21 which extends across the cutting unit 7, so that all locking springs 34 can be biased by him.

The spring carrier 21 is movably mounted on the cutter bar 9, namely on the end of the cutter bar pivot axis 13 facing away from the cutter bar 9. The Fedemträ-ger 21 is pivotable about a spring carrier pivot axis 22, which is approximately horizontal and parallel to the pivot axis of the locking lever 18th extends. By pivoting the spring carrier 21 about its pivot axis 22 relative to the cutter bar 9, the locking springs 34 can be tensioned and relaxed, in the illustrated embodiment, the locking springs 34 are relaxed when the spring carrier 21 about its pivot axis 22 forward, i. pivots to the left according to Figure 3 or 5.

In order to tension or to relax the locking springs 34 as a function of the position of the knife bar 9, the spring carrier 21 is articulated by a coupling 23 in the form of a rod to the machine frame 12, so that a relative movement between the knife bar 9 and the machine frame 12 is tapped and in a movement of the spring carrier 21 relative to the cutter bar 9 can be implemented. Said coupling 23 is hinged to the machine frame 12 at a pivot point 24 which is spaced from the cutter bar pivot axis 13 and is arranged slightly above the cutter bar pivot axis 13 in the illustrated embodiment. The other end of the coupling 23 is articulated on the spring carrier 21, wherein the articulation point 25 is designed to be movable or displaceable. This is realized in the illustrated embodiment by a slot 26 in the coupling 23 in which the pivot point 25 can migrate when it is not blocked. The arrangement of the coupling 23 and its articulation points 24 and 25 is made such that in the retracted working position of the cutting unit 7, the coupling 23 forces the spring carrier 21 in its locking position, the figure 3 shows. In this locking position, the spring carrier 21 is moved or pivoted away from the latch lever pivot axis 20, so that the locking springs 34 are tensioned. In the retracted position of the cutting unit 7, the articulation point 25 of the spring carrier 21 is always located at the inner end of the slot 26, as shown in FIG.

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In order to lock the spring carrier 21 in its locking position relative to the cutter bar 9, a spring carrier lock 27 is provided in the form of a locking lever 28 which is pivotally hinged on the machine frame side and in the drawn in Figure 3 position in such a way with the spring carrier 21 into engagement that desss 22 is locked.

If the cutting unit 7 is swung down from the retracted working position shown in FIGS. 2 and 3 into the non-working position shown in FIGS. 4 and 5, the knives 8 move out of the conveying channel 5. If in this case the spring carrier 21 is locked by the aforementioned locking lever 28, the spring carrier 21 keeps the locking springs 34 tensioned so that the blades 8 remain locked via the locking lever 18. In order to keep the spring carrier 21 in its locked position, i. to allow in its locking position when extending the cutting unit 7, without causing a collision with the coupling 23, the slot 26 is provided in said coupling 23. As a comparison of FIGS. 2 and 4 shows, the articulation point 25 travels in the oblong hole 26 at its rear end.

If, in contrast, the cutting unit 7 is extended without locking the spring carrier 21, the spring carrier 21 can move relative to the cutter bar 9 and the locking springs 34 relax. For this purpose, the locking lever 28 of the spring carrier lock 27 is first unlocked in the retracted working position of the cutting unit 7 shown in FIG. 6, which can be achieved by pivoting the locking lever 28 upward, as shown in FIG. As a result, the mobility of the spring carrier 21 is released to the spring carrier pivot axis 22. In the working position of the cutting unit 7, this initially has no effect, since the coupling 23 holds the spring carrier 21 in its locking position. However, if the cutter bar 9 is pivoted away from the conveyor channel 5 and the cutting unit 7 is moved to its non-working position, as shown in FIGS. 7 and 8, the spring carrier 21 can pivot on the latching lever 18 so that the locking springs 34 relax. The spring carrier 21 remains with its pivot point 25 at the inner end of the slot 26 so that guided by the coupling 23, the locking springs 34 relax slowly, the more the cutting unit 7 is extended.

In the drawn in Figures 7 and 8 extended non-working position of the cutting unit 7 with dissolved spring carrier 21, the knife 8 can be easily removed by being pivoted about the knife pivot axis 17, wherein the locking lever 18 detach from the detent recesses 19. The locking springs 34 stop this no longer.

Since the locking lever 18 can settle in the detent recesses 19, the cutting unit 7 advantageously comprises a Rasthebelausheber 29 through which in the last phase of swinging out of the cutter bar 9, the locking lever 18 with its locked in the detent recess 19 a little bit away from the knife 8 and thus be excavated from the detent recess 19, so that the role is no longer completely in the knife detent position, but only so far that the knife is still held laterally. Said Rasthebelausheber 29 may be formed in particular in the form of a switching shaft 30, which may have a cam-like acting engagement surface on its periphery, to lift the locking lever 18 in said manner by turning the shift shaft 30. In particular, the switching shaft 30 may have a peripheral flattening. If the shift shaft 30 is turned with said flattening to the locking levers 18, they can fully engage in the detent recesses 19. If the flattening, however, is turned away, the shift shaft 30 with its then not flattened peripheral side lifts the locking lever 18.

As Figure 8 shows, the shift shaft 30 may extend parallel to the locking lever pivot axis 20 spaced therefrom across the cutting unit 7, so that centrally by pivoting or rotating said switching shaft 30 all locking lever 18 can be easily excavated.

Preferably, said switching shaft 30, which may be mounted on the cutter bar 9, coupled to the spring carrier 21, so that the actuation of the switching shaft 30 in response to the position of the spring carrier 21 and the locking lever 18 are automatically lifted easily when the spring carrier 21st reached its non-locking position. The coupling can be done by a handlebar, which is hinged on the one hand to the spring carrier 21 and on the other hand articulated on a rotatably connected to the switching shaft 30 lever.

In order to ensure that the spring carrier 21 also moves completely into its non-locking position with the spring carrier lock 27 released during extension of the cutting unit 7, a spring carrier holder 31 can be provided which blocks the pivot point 25 of the spring carrier 21 against the coupling 23, i. locks the freewheel of the slot 26. In the illustrated embodiment, the spring carrier 21 is formed by a pivot lever 32 which is pivotally hinged to the coupling 23 and has a locking jaw 33, by means of which the pivot lever 32 the pivot point 25 at the inner end of the slot 26th

Claims (15)

9 AT 502 917 B1 and fix it there, cf. Figure 7. If the spring carrier 21 is fixed by the pivot lever 32 to the coupling 23, this forces the spring carrier 21 forcibly in its non-locking position when swinging the cutting unit 7. Claims: 1. A harvester, in particular a loader wagon, comprising a cutter (7) comprising a plurality of knives (8) releasably secured to a cutter bar (9) by locking elements (18) provided by locking springs (34) in their heads the knife (8) locking position can be tensioned, wherein the cutter bar (9) between a working position in which the blades (8) project into a conveying channel (5), and a non-working position in which the blades (8) from the Conveying channel (5) are removed, is movably mounted on a frame part (12), wherein on the cutter bar (9) a spring carrier (21) movable between a locking position in which the locking springs (34) in their the knife (8) locking position are tensioned, and a non-locking position in which the locking springs (34) allow release of the locking elements (18) is mounted, wherein the spring carrier (21) by a coupling (23) is coupled to a frame part (12), in the working position of the cutter bar (9) forces the spring carrier (21) in its locking position and in the non-working position of the cutter bar (9) for the spring carrier (21) both the locking position and the non-locking position permits, characterized in that a spring carrier lock (27) is provided with a movable latch for locking the spring carrier (21) in its locking position relative to the cutter bar (9), wherein the bolt (28) with the spring carrier (21) can be brought into locking engagement and in its locking engagement position a Movement of the spring carrier (21) relative to the cutter bar (9) prevents. 2. Harvesting machine according to the preceding claim, wherein the coupling (23) on the spring carrier (21) and / or on the frame part (12) is articulated longitudinally displaceable, in particular has a slot fixing. 3. Harvesting machine according to claim 1 or 2, wherein the cutter bar (9) about a horizontal blade bar pivot axis (13) on the frame part (12) is mounted and the coupling (23) at a spaced from the knife bar pivot axis (13) articulation point (24) pivotally is hinged to the frame part (12). 4. Harvesting machine according to claim 3, wherein the spring carrier (21) on the cutter bar (9) about a spring carrier pivot axis (22) is pivotally mounted, which extends parallel to the cutter bar pivot axis (13). 5. Harvester according to claim 4, wherein the spring carrier (21) at one end of the cutter bar (9) is mounted thereon, which faces away from the articulation end of the cutter bar (9) on which it is mounted on the frame part (12). 6. Harvesting machine according to claim 1, wherein the locking elements (18) are designed as pivotable latching lever pivotally mounted on the cutter bar (9) about a Rasthebelschwenkachse (20) and with a latching contour, in particular a detent recess on the knives (8) in Intervention can be brought. 7. Harvesting machine according to claim 6, wherein the knives (8) with a contour opposite its locking contour in a blade receptacle on the cutter bar (9) replaceable, in particular on a knife pivot axis (17) are placed, and can be locked by the locking lever in the blade holder. 8. Harvesting machine according to claim 6 or 7, wherein the Rasthebelschwenkachse (20) and the 10 AT 502 917 B1 spring carrier pivot axis (22) are aligned parallel to each other. 9. Harvesting machine according to claim 1, 4 or 5, wherein the spring carrier (21) extends over a blade-tipped portion of the cutter bar (9) and all the locking springs (34) on the spring carrier (21) are attached. 10. Harvesting machine according to claim 1, 6, 7 or 8, wherein on the cutter bar (9) a Verriegelungsausheber (29) is provided, by which the locking engagement between the blades (8) and the locking elements (18) is at least partially solvable , 11. A harvesting machine according to claim 10, wherein the locking lifter (29) has a switching shaft (30) which is rotatably mounted on the cutter bar (9) and a cam-like engagement surface, in particular a flattening on the periphery and a circular cylindrical portion for movement of the locking elements (18 ) owns. 12. Harvesting machine according to claim 10 or 11, wherein the Verriegelungsausheber (29) connected by a Ausheberkoppel with the spring carrier (21) and / or depending on the position of the spring carrier (21) relative to the cutter bar (9) is actuated. 13. Harvesting machine according to claim 1, 2 or 3, wherein a freewheeling lock (31) for blocking the freewheel of the coupling (23) and / or the articulation of the spring carrier (21) on the machine frame (12) through the coupling (23) is provided , 14. Harvesting machine according to claim 13, wherein the freewheeling lock (31) has a pivot lever (32) through which the articulation points (24, 25) between the coupling (23) and the machine frame (12) and / or the spring carrier (21) the coupling (23) can be fixed. 15. Harvesting machine according to claim 13 or 14, wherein the freewheeling lock (31) in dependence on the position of the spring carrier lock (27) is actuated. Including 8 sheets of drawings