Reciprocating cutting bar

Abstract

The invention relates to a reciprocating cutting bar (1) comprising: a finger bar (2), a mowing finger arrangement (3, 4, 5) which has a fastening portion (8) by way of which the mowing finger arrangement (3, 4, 5) is fastened to the finger bar (2), wherein a fastening slot (10) which is open towards an end side (12) of the fastening portion (8) is formed in the fastening portion (8), and a fastening arrangement (6) with a clamping bolt (14), wherein the clamping bolt (14) extends through the fastening slot (10) of the fastening portion (8), and the fastening portion (8) and the fastening arrangement (6) are fastened by means of the clamping bolt (14) to the finger bar (2), wherein the fastening portion (8) of the mowing finger arrangement (3, 4, 5) and the fastening arrangement (6) have form-fit elements (49, 50) which are in engagement with one another.

Description

[0001] cutter bar

[0002] Description

[0003] The invention relates to a cutter bar, in particular of an agricultural harvesting machine, wherein the cutter bar comprises a finger bar, a cutter finger arrangement, and a fastening arrangement with a clamping bolt. The cutter finger arrangement has a fastening section with which the cutter finger arrangement is fastened to the finger bar, wherein a fastening slot is formed in the fastening section, which is open to an end face of the fastening section and extends in an assembly direction. The cutter finger arrangement is pushed onto the clamping bolt with the fastening slot in the assembly direction transversely to a longitudinal axis of the clamping bolt, such that the clamping bolt extends through the fastening slot of the fastening section, wherein the fastening section and the fastening arrangement are fastened to the finger bar by means of the clamping bolt.

[0004] Mower bars of this type are used in finger bar mowers on harvesting machines. The mower finger assembly is designed to interact with an oscillating or reciprocating driven mower blade to produce a cutting action. The mower finger assembly guides the mower blade and acts as counter-blades for the blades mounted on the mower blade. Typically, several mower finger assemblies with one or more mower fingers are mounted on the finger bar. The mower finger assemblies can be manufactured as drop forged parts or as cast parts and essentially comprise a sturdy lower finger section that is bolted to the finger bar at its rear end, a tapered, forward-facing fingertip, and a finger lip or upper mower finger section that extends rearward from the fingertip and, together with the lower mower finger section, forms a blade gap in which the mower blade is guided in a reciprocating motion.The lateral flanks of the mowing finger, both the lower and upper parts of the mowing finger, form the counter-blades for the mowing blade in the area of ​​the mowing blade. However, the mowing finger assembly can also be made of sheet metal parts, such as a lower and upper part of the mowing finger, each made of sheet metal. The mowing blade usually comprises a blade rail to which several knife blades, usually triangular in shape, are attached. During the cutting process, the crop is pressed against the mowing fingers by the back and forth movement of the mowing blade, and cut off.

[0005] For mounting, the mower finger assemblies usually have one or more mounting sections with mounting holes. The finger bar is also provided with mounting holes so that the mower finger assemblies can be attached to the finger bar using screws. To disassemble the mower finger assemblies, the screws must be completely removed from the mounting holes.

[0006] During operation of the finger bar mower, it may be necessary to replace individual mower finger assemblies or knife blades due to wear or damage. To minimize harvester downtime, quick disassembly and assembly of individual mower finger assemblies is desirable for replacement or access to the knife blade requiring replacement.

[0007] For this purpose, US 3 525 203 A proposes a mowing finger arrangement of the type mentioned above, in which a fastening slot is formed in the fastening section of the mowing finger arrangement, starting from a rear end face, which receives the clamping bolt when the mowing finger arrangement is mounted on the finger bar. The clamping bolt is a screw that is secured to the finger bar via a nut and serves to clamp the fastening section to the finger bar. The fastening section is fastened below the finger bar, with the screw head held down by gravity so that the fastening section with its fastening slot can be pushed onto the screw shaft between the finger bar and the screw head. A groove running transversely to a mounting direction is incorporated in the finger bar, into which groove a correspondingly designed web on the mowing finger arrangement engages when mounted.These form-locking elements of the finger bar on the one hand and the mowing finger assembly on the other are intended to prevent accidental release of the mowing finger assembly. By loosening the clamping bolt, the web of the mowing finger assembly can first be removed from the groove and then the mowing finger assembly can be detached from the finger bar in one disassembly direction without having to remove the clamping bolt. To assemble the mowing finger assembly, it can be pushed onto the clamping bolt in the direction of the fastening slot. This eliminates the time-consuming process of completely removing fastening screws, which can speed up the process of changing the mowing finger assemblies. A disadvantage, however, is that for this type of form-locking element, the finger bar must be specially provided with a groove, meaning that existing mowers cannot be retrofitted with mowing finger assemblies with a fastening slot.

[0008] EP 0 473 893 A1 describes a cutting unit with flat, level mulching fingers, a reciprocating mowing blade with knife blades, and a spring-loaded blade presser for agricultural mowers, particularly for harvesting forage and grass. The blade pressers and the mulching fingers are attached to a finger bar via fastening screws in mounting holes.

[0009] The object of the present invention is to provide a cutter bar which ensures safer and simple assembly and disassembly of the cutter finger arrangement from or to the finger bar and enables retrofitting of existing systems.

[0010] The problem is solved by a cutter bar, in particular of an agricultural harvesting machine, wherein the cutter bar comprises a finger bar, a cutter finger arrangement, and a fastening arrangement with a clamping bolt. The cutter finger arrangement has a fastening section with which the cutter finger arrangement is fastened to the finger bar, wherein a fastening slot is formed in the fastening section, which is open to an end face of the fastening section and extends in an assembly direction. The cutter finger arrangement is pushed onto the clamping bolt with the fastening slot in the assembly direction transversely to a longitudinal axis of the clamping bolt, such that the clamping bolt extends through the fastening slot of the fastening section, wherein the fastening section and the fastening arrangement are fastened to the finger bar by means of the clamping bolt.The fastening section of the mowing finger arrangement and the fastening arrangement have form-locking elements that engage with one another.

[0011] Because the positive locking elements between the mower finger assembly and the mounting assembly are effective, the finger bar does not require any special design when using the mower finger assembly with a mounting slot. This makes it easy to convert conventional mower bars. Mower finger assemblies with holes for mounting, where the fastening screws must be completely removed for assembly and disassembly, can be easily replaced with mower finger assemblies with mounting slots and mounting assemblies, without the need to adapt the finger bar.

[0012] The mowing finger assembly can be slid onto the finger bar in one assembly direction, with the fastening slot extending in the assembly direction to the end face of the fastening section and completely penetrating the fastening section in the direction of a longitudinal axis of the clamping bolt. The fastening slot is slid transversely to the longitudinal axis of the clamping bolt in the assembly direction until the clamping bolt passes through the fastening slot of the fastening section. The fastening section and the fastening assembly are then clamped to the finger bar using the clamping bolt.

[0013] The form-locking elements can, for example, be a combination of a recess and a projection arranged opposite one another parallel to a longitudinal axis of the clamping bolt. When clamped or installed, the projection engages the projection in the direction of the longitudinal axis and thus transversely to the mounting direction of the mowing finger assembly. Thus, the form-locking elements secure the mowing finger assembly with a form-locking effect, in addition to the force-locking effect of the clamping bolt, against being pulled off the finger bar in the opposite direction of installation.

[0014] Alternatively, the form-locking elements can also be a combination of an edge of the fastening assembly and a projection of the mowing finger assembly, with the projection of the mowing finger assembly engaging behind the edge of the fastening assembly. This results in an overlap of the projection with the fastening assembly when viewed opposite to the mounting direction of the mowing finger assembly. This also secures the mowing finger assembly with a form-locking connection, in addition to the force-locking effect of the clamping bolt, against being pulled off the finger bar opposite to the mounting direction.

[0015] According to an exemplary embodiment, the fastening arrangement comprises a bracket, via which the fastening section of the mowing finger arrangement is clamped against the finger bar by means of the clamping bolt, at least indirectly, i.e., directly or indirectly. The form-locking elements can be arranged on the bracket or incorporated into it. In order to engage and disengage the form-locking elements of the mowing finger arrangement and the bracket, the bracket can be displaceable parallel to the longitudinal axis of the clamping bolt or transversely to the mounting direction and / or can be elastic.

[0016] The mounting section can be clamped directly or indirectly between the bracket and the finger bar. In the case of indirect clamping to the finger bar, a guide plate for guiding the mowing blade can be arranged, for example, between the mounting section of the mowing finger assembly and the finger bar.

[0017] A receptacle can be formed between the bracket and the finger bar, in which the fastening section of the mowing finger arrangement is received. The receptacle is arranged between the bracket and the finger bar, wherein further components or elements can be located between the receptacle and the bracket and / or between the receptacle and the finger bar. For example, the receptacle can be limited in the direction of the finger bar by a guide plate for guiding the mowing blade or by a base plate of the fastening arrangement. Means are preferably provided which hold the bracket at a minimum distance from the finger bar so that the receptacle remains open even when the fastening section of the mowing finger arrangement is removed therefrom, such that the fastening section of the mowing finger arrangement can be pushed into the receptacle unhindered and without prior displacement or adjustment of the bracket.

[0018] The bracket may have a holding portion, wherein the receptacle is arranged between the holding portion and the finger bar.

[0019] The bracket can have a support section laterally adjacent to the receptacle, which is supported against the finger bar without the interposition of the mounting section of the mowing finger assembly. The support section can be held at a smaller distance from the finger bar than the holding section.

[0020] The clamping bolt runs through an opening, e.g. a hole, in the bracket and through an opening, e.g. a hole, in the finger beam and is supported on opposite sides of the finger beam.

[0021] The bracket can be arranged on a vertically upper or lower side of the finger bar.

[0022] According to one embodiment, the mowing finger assembly can have a further fastening section in addition to the aforementioned fastening section, wherein a fastening slot open to an end face of the further fastening section is formed in the further fastening section. The fastening assembly comprises two clamping bolts, each extending through one of the fastening slots of the two fastening sections. The clamping bolts each extend through an opening, e.g., a bore, in the bracket and through an opening, e.g., a bore, in the finger bar, and are each supported on opposite sides of the finger bar.

[0023] According to one embodiment, the mowing finger assembly can have a fixing section, wherein the fastening section and the fixing section are arranged on different sides of the finger bar and are fastened to the finger bar by means of a common clamping bolt. The clamping bolt extends through the fastening slot of the fastening section and through the fastening slot of the fixing section. The clamping bolt can be a screw that is axially supported by a screw head on one side of the finger bar and is supported against the finger bar on an opposite side of the finger bar by a screw nut.

[0024] The screw can be supported in one of the fastening slots to prevent rotation around a longitudinal axis of the screw. This allows the screw nut to be tightened on one side of the finger bar without requiring an additional tool to secure the screw against rotation. For this purpose, the screw can be designed as a square profile in an axial section where it sits in the fastening slot, with the fastening slot being designed to be compatible with this. The square profile of the screw is thus supported against the walls of the fastening slot.

[0025] Preferred embodiments are explained in more detail below with reference to the drawings, in which:

[0026] Figure 1 is a perspective view of a first embodiment of a cutter bar,

[0027] Figure 2 shows a cross section viewed in the mounting direction through a fastening arrangement according to Figure 1,

[0028] Figure 3 shows a longitudinal section through a mowing finger arrangement and a fastening arrangement according to Figure 1,

[0029] Figure 4 is a perspective view of a second embodiment of a cutter bar,

[0030] Figure 5 shows a cross section viewed in the mounting direction through a fastening arrangement according to Figure 4,

[0031] Figure 6 shows a longitudinal section through a mowing finger arrangement and a fastening arrangement according to Figure 4,

[0032] Figure 7 is a perspective view of a second embodiment of a cutter bar,

[0033] Figure 8 shows a cross section viewed in the mounting direction through a fastening arrangement according to Figure 7,

[0034] Figure 9 shows a longitudinal section through a mowing finger arrangement and a fastening arrangement according to Figure 7,

[0035] Figure 10 is a perspective view of a second embodiment of a cutter bar,

[0036] Figure 11 shows a cross section viewed in the mounting direction through a fastening arrangement according to Figure 10,

[0037] Figure 12 shows a longitudinal section through a mowing finger arrangement and a fastening arrangement according to Figure 10.

[0038] Figure 1 shows a perspective view of a first embodiment of a cutter bar 1 for an agricultural harvesting machine with a working direction A in the direction of a longitudinal axis X, in which the agricultural harvesting machine and thus the cutter bar 1 is moved. The cutter bar 1 has a main extension direction transverse to the longitudinal axis X in the direction of a transverse axis Y. The longitudinal axis X and the transverse axis Y are arranged perpendicular to a vertical axis Z and together form a Cartesian coordinate system.

[0039] The mower bar 1 comprises a finger bar 2, which in the present embodiment is designed as an L-profile made of steel. The finger bar 2 can also have other profile shapes and be made of a different material. A plurality of mower finger assemblies 3, 4, 5 are fastened to the finger bar 2, wherein in the illustration shown, one of the mower finger assemblies 3 is shown in a disassembled state and the other two mower finger assemblies 4, 5 shown in an assembled state. Since in the embodiment shown, all mower finger assemblies 3, 4, 5 are identical, the disassembled mower finger assemblies 3 will be described in detail below for the sake of simplicity, representative of all mower finger assemblies 3, 4, 5.

[0040] The mowing finger arrangement 3 can be pushed onto the finger bar 2 in an assembly direction M, which is aligned parallel to the longitudinal axis X and opposite to the working direction A, and fastened to the finger bar 2 by means of a fastening arrangement 6. In the assembled state of all mowing finger assemblies 3, 4, 5, these serve to guide a mowing blade 7 and to cut together with the mowing blade 7. The mowing blade 7 is driven in an oscillating manner, i.e., reciprocating motion, along the transverse axis Y. For fastening the mowing finger arrangement 3, it has a first fastening section 8 and a second fastening section 9. In principle, however, a single fastening section or more than two fastening sections are also conceivable. The fastening sections 8, 9 are formed in an upper part 16 of the mowing finger arrangement 3 made of sheet metal.

[0041] A first fastening slot 10 is provided in the first fastening section 8, which extends from a first end face 12, the first end face 12 being arranged at the rear of the mowing finger arrangement 3 as viewed in the working direction A. The first fastening slot runs parallel to the longitudinal axis X and penetrates the first fastening section 8 completely in the direction of the vertical axis Z. The second fastening section 9, similar to the first fastening section 8, has a second fastening slot 11 which extends from a second end face 13, the second end face 13 also being arranged on a rear side of the mowing finger arrangement 3 as viewed in the working direction A. The second fastening slot 11 also runs parallel to the longitudinal axis X and penetrates the second fastening section 9 completely in the direction of the vertical axis Z.

[0042] The fastening arrangement 6 has a clamping bolt in the form of a first screw 14 and another clamping bolt in the form of a second screw 15. To assemble the mowing finger arrangement 3, it is pushed onto the screws 14, 15 in the assembly direction M with the fastening slots 10, 11 until the screws 14, 15 are each arranged within one of the fastening slots 10, 11. The screws 14, 15 are aligned parallel to the vertical axis Z, so that the fastening sections 8, 9 are pushed onto the screws 14, 15 radially. The fastening sections 8, 9 are clamped against the finger bar 2 by means of a first screw nut 17, which is screwed onto the first screw 14, and a second screw nut 18, which is screwed onto the second screw 15.

[0043] The mowing blade 7 has a blade back 19, which in the illustrated embodiment is formed by a flat steel bar and extends in the direction of the transverse axis Y. The blade back 19 can also be made from an element other than a flat steel bar, such as any desired longitudinal profile. In the direction of the transverse axis Y, a plurality of blades 20 are fastened next to one another on the blade back 19 in the transverse direction Y. Each blade 20 tapers to a point towards the front in the working direction A and forms two lateral cutting edges 21, 22. These cutting edges cooperate with the mowing finger assemblies 3, 4, 5. The mowing finger assemblies 3, 4, 5 are designed as double fingers and each have two fingers 23, 24 pointing forward in the working direction. In principle, it is also conceivable for there to be only one finger or more than two fingers.The fingers 23, 24 are formed by the upper part 18, a middle part 25, and a lower part 26, each of which is made of sheet metal and welded, glued, or otherwise connected to one another by known joining methods. The upper part 16 and the middle part 25 form counter-cutting edges 30, 31 for the knife blades 20. Two counter-cutting edges 30, 31 are formed on two opposite sides of the fingers 23, 24, with one of the counter-cutting edges 30 being arranged on the middle part 25 and the other counter-cutting edge 31 on the upper part 16. The cutting edges 21, 22 are each formed by an oblique bevel of the respective knife blade 20. The knife blades 20 are mounted alternately in the direction of the transverse axis Y in such a way that a knife blade 20 with the cutting edges 21, 22 on a lower side in the direction of the vertical axis Z alternates with a knife blade 20 with the cutting edges 21, 22 on an upper side in the direction of the vertical axis Z.The knife blades 20 with the cutting edges 21, 22 on the lower side interact with the counter-cutting edges 30 on the middle parts 25 of the mowing finger assemblies 3, 4, 5. The knife blades 20 with the cutting edges 21, 22 on the upper side interact with the counter-cutting edges 31 on the upper part 18 of the mowing finger assemblies 3, 4, 5.

[0044] On the lower part 26, a fixing section 27 is arranged which points rearward as viewed in the working direction A and which has a third fixing slot 28 and a fourth fixing slot 29 which are also open rearward. The third fixing slot 28 overlaps the first fixing slot 10 of the first fixing section 8 as viewed in the direction of the vertical axis Z. The fourth fixing slot 29 overlaps the second fixing slot 11 of the second fixing section 9 as viewed in the direction of the vertical axis Z. The third fixing slot 28 and the fourth fixing slot 29 each run parallel to the longitudinal axis X and penetrate the fixing section 27 completely in the direction of the vertical axis Z.Thus, the mowing finger assembly 3 can be attached to the first screw 14 and the second screw 15 such that the first screw 14 penetrates both the first fastening slot 10 and the third fastening slot 28, and the second screw 15 penetrates both the first fastening slot 11 and the fourth fastening slot 29. In the assembled state, the fixing section 27 is located on a side of the finger bar 2 facing away from the two fastening sections 8, 9.

[0045] Figure 2 shows a longitudinal section through the fastening arrangement 6 according to Figure 1 with mounted mowing finger arrangement 3 in the mounting direction M, wherein the sectional plane is spanned by the transverse axis Y and the vertical axis Z.

[0046] The fastening arrangement 6 comprises a bracket 32 ​​and a base plate 33. The fastening sections 8, 9 of the mowing finger arrangement 3 are arranged between the bracket 32 ​​and the base plate 33 and clamped between them. The base plate 33 is supported or clamped against the finger bar 2 via a guide plate 34. The guide plate 34 serves to guide the mowing blade 7, as will be explained below. On a side of the finger bar 2 facing away from the bracket 32, the fixing section 27 of the mowing finger arrangement 3 is arranged in contact with the finger bar 2, against which an intermediate plate 35 in turn bears. The intermediate plate 35 can also be part of a sliding shoe or "skid shoe" (not shown), via which the mowing bar is supported in a sliding manner against the ground.The two screws 14, 15 are identically constructed and each arranged identically with respect to the fastening sections 8, 9, so that the first screw 14 and its fastening are explained below as representative of both screws 14, 15. The first screw 14 has a screw head 36, which is axially supported against the intermediate plate 35 in the direction of a longitudinal axis S of the first screw 14 on a side facing away from the finger beam 2. The first screw 14 has a screw shaft 42 that extends along the longitudinal axis S.The screw shaft 42 is guided through an opening 37 in the intermediate plate 35, through the third fastening slot 28 of the fixing section 27 of the mowing finger arrangement 3, through an opening in the form of a bore 38 in the finger bar 2, through an opening in the form of a bore 39 in the guide plate 34, through an opening in the form of a bore 40 in the base plate 33, through the first fastening slot 10 of the first fixing section 8, and through an opening in the form of a bore 41 in the bracket 32. The first screw nut 17 is screwed onto the free end of the screw shaft 42 and, on the one hand, clamps the first fixing section 8 indirectly via the base plate 33 and the guide plate 34 against the finger bar 2, and, on the other hand, clamps the fixing section 27 against the finger bar 2 on a side of the finger bar 2 facing away from the bracket 32.

[0047] In the area of ​​the screw head 36, the screw shaft 42 has an anti-rotation section 45 with a non-circular, in particular square, cross-section (square cross-section). This anti-rotation section 45 rests against flanks of the third fastening slot 28 such that the first screw 14 is secured against rotation about the longitudinal axis S of the first screw 14. Thus, the first screw nut 17 can be screwed onto the screw shaft 42 without having to separately secure the first screw 14 against rotation. Furthermore, the opening 37 of the intermediate plate 35 also has a cross-section complementary to the square cross-section of the anti-rotation section 45. The screw 14 is thus also held against rotation relative to the intermediate plate 35.This ensures that the screw 14 always has a rotational position that allows the fastening section 8 and thus the fastening slot 10 to be pushed onto the screw 14 in the radial direction to the screw shaft 42.

[0048] The bracket 32 ​​has a central support section 46, which is held and supported directly against the base plate 33. Starting from the central support section 46, a first holding section 47 extends in the direction of the first screw 14 and a second holding section 48 extends in the direction of the second screw 15. The bores 41 for the screws 14, 15 are arranged in the holding sections 47, 48. The holding sections 47, 48 are arranged at an axial distance relative to the vertical axis Z from the base plate 33, so that a first receptacle 43 is arranged between the first holding section 47 and the base plate 33 and a second holding section 48 is arranged between the second holding section

[0049] 48 and the base plate 33, a second receptacle 44 is formed. The first fastening section 8 is inserted into the first receptacle 43. The second fastening section 9 is inserted into the second receptacle 44. The support section 46 is arranged laterally offset from the receptacles 43, 44 in the direction of the transverse axis Y.

[0050] In the first fastening section 8 there is a recess 49 in the form of a bore parallel to the vertical axis Z. In the first holding section 47 of the bracket 32 ​​there is a projection 50 in the direction of the recess 49, which is formed by an impression in the first holding section 47. The projection 50 dips into the recess

[0051] 49, so that the recess 49 and the projection 50 form positive-locking elements that engage with each other. Analogously, identical positive-locking elements are arranged in the second holding section 48 and the second fastening section 9.

[0052] Figure 3 shows a longitudinal section through the mowing finger arrangement 3 according to Figure 1, in the assembled state, wherein the cutting plane runs through the form-locking elements and is spanned by the longitudinal axis X and the vertical axis Z.

[0053] It can be seen that the blade back 19 of the mowing blade 7, viewed in the working direction A, is supported rearward against the guide plate 34. The blades 20 protrude rearward beyond the blade back 19 and are supported or guided vertically downward against the guide plate 34. The bracket 32 ​​has a hold-down section 51 protruding forward beyond the blades 20, so that the blades 20 are arranged and guided between the guide plate 34 and the hold-down section 51.

[0054] Figures 4 to 6 show a second embodiment of a cutter bar 101 in different views, wherein components and features that correspond to components of the first embodiment are provided with reference numerals that are increased by the value 100 and are described in connection with the first embodiment.

[0055] The cutter bar 101 according to the second embodiment is largely identical to the cutter bar of the first embodiment, but differs with regard to the form-locking elements on the cutter finger assemblies 103, 104, 105.

[0056] In contrast to the first embodiment, the two fastening sections 108, 109 of the mowing finger arrangement 103 do not have a projection and a recess. Instead, the fastening sections 108, 109 each have a projection 150 in the form of a bead, as will be explained below for both fastening sections 108, 109 with reference to the first fastening section 108. The first fastening section 108, with the projection 150, projects rearward beyond the intermediate plate 133 as viewed in the working direction A and engages behind an edge 149 of the intermediate plate 133 in the direction of the vertical axis Z. When forces act on the mowing finger arrangement 130 opposite to the assembly direction, the projection 150 in the form of a bead abuts the edge 149 of the intermediate plate 133 and thus provides a positive connection.

[0057] Figures 7 to 9 show a third embodiment of a cutter bar 201 in different views, wherein components and features that correspond to components of the first embodiment are provided with reference numerals that are increased by the value 200 and are described in connection with the first embodiment.

[0058] The cutter bar 201 according to the third embodiment is largely identical to the cutter bar of the first embodiment, but differs with regard to the cutter finger assemblies 203, 204, 205. The cutter finger assemblies 203, 204, 205 are not made as sheet metal fingers with an interconnected, in particular welded, upper part, middle part and lower part made of sheet metal, as in the first two embodiments, but are designed as forged or cast parts.

[0059] The mowing finger assemblies 203, 204, 205 are described below using the disassembled mowing finger assembly 203. The mowing finger assembly 203 is attached to the finger bar 202 only via the first attachment section 208 and the second attachment section 209. The two attachment sections 208, 209 are not arranged above the finger bar 202 in the direction of the vertical axis Z, as in the first two embodiments, but vertically below it. The mowing finger assembly 203 does not have a fixing section like the first two embodiments.

[0060] The fingers 223, 224 of the mowing finger arrangement 203 each form a guide slot 252, 253 which is open at the rear when viewed in the working direction A. The guide slots 252, 253 serve to guide the knife blades 220 and also form the counter-blades 230, 231.

[0061] As can be seen in Figure 8, the first fastening section 208 is located between the bracket 232, which is also arranged vertically below the finger bar 202, and the finger bar 202. On the opposite side of the finger bar 202, the guide plate 234 and the base plate 233 are arranged and clamped against the finger bar 202.

[0062] The form-locking elements correspond to those of the first embodiment with a projection 250 in the form of an impression in the bracket 232 and a recess 249 in the form of a through-hole in the first fastening section 208. The fastening via the second screw 215 is constructed identically.

[0063] As can be seen in Figure 8, a hold-down device 216 is formed on the base plate 233, which is curved in shape and with a free end limits a possible movement of the knife blades 220 vertically upwards in the direction of the vertical axis Z.

[0064] Figures 10 to 12 show a fourth embodiment of a cutter bar in different views, wherein components and features that correspond to components of the first embodiment are provided with reference numerals increased by the value 300 and are described in connection with the first embodiment. The cutter bar 301 according to the fourth embodiment is largely identical to the cutter bar of the third embodiment, but differs with regard to the form-locking elements on the cutter finger assemblies 303, 304, 305. In contrast to the third embodiment, there is no projection and no recess in the two fastening sections 308, 309 of the cutter finger assembly 303.Instead, the fastening sections 308, 309, comparable to the second embodiment, as explained below for both fastening sections 308, 309 with reference to the first fastening section 308, each have a projection 350 in the form of a bead, which is arranged on the rear end face 312 of the first fastening section 308. The first fastening section 308, with the projection 350, projects rearward beyond the bracket 332 as viewed in the working direction A and engages behind an edge 349 of the bracket 332 in the direction of the vertical axis Z. When forces act on the mowing finger arrangement 303 opposite to the assembly direction M, the projection 350 in the form of a bead abuts against the edge 349 of the bracket 332 and provides a positive connection.

[0065] List of reference symbols

[0066] 1, 101, 201, 301 cutter bars

[0067] 2, 102, 202, 302 finger bars

[0068] 3, 103, 203, 303 Mowing finger arrangement

[0069] 4, 104, 204, 304 mowing finger arrangement

[0070] 5, 105, 205, 305 mowing finger arrangement

[0071] 6, 106, 206, 306 mounting arrangement

[0072] 7, 107, 207, 307 mower blades

[0073] 8, 108, 208, 308 first fastening section

[0074] 9, 109, 209, 309 second fastening section

[0075] 10, 110, 210, 310 first mounting slot

[0076] 11 , 111 , 211 , 311 second fastening slot

[0077] 12, 112, 212, 312 first front side

[0078] 13, 113, 213, 313 second front side

[0079] 14, 114, 214, 314 first screw (clamping bolt)

[0080] 15, 115, 215, 315 second screw (clamping bolt)

[0081] 16, 116 top

[0082] 117, 217, 317 first screw nut

[0083] 18, 118, 218, 318 second screw nut

[0084] 19, 119, 219, 319 knife back

[0085] 120, 220, 320 knife blade

[0086] 121 , 221 , 321 cutting edge

[0087] 22, 122, 222, 322 cutting edge

[0088] 23, 123, 223, 323 fingers

[0089] 124, 224, 324 fingers

[0090] 25, 125 middle section

[0091] 126 lower part

[0092] 27, 127 fixing section, 128 third fastening slot, 129 fourth fastening slot, 130, 230, 330 counter-blade, 131, 231, 331 counter-blade, 132, 232, 332 bracket, 133, 233, 333 base plate, 134, 234, 334 guide plate, 135, 235, 335 intermediate plate, 136, 236, 336 screw head, 137 bore, 138, 238, 338 bore, 139, 239, 329 bore, 140, 240, 340 bore, 141, 241, 341 bore, 142, 242, 342 screw shaft , 143, 243, 343 first receptacle , 144, 244, 344 second receptacle , 145, 245, 345 anti-rotation section, 146, 246, 346 support section , 147, 247, 347 first holding section , 148, 248, 348 second holding section, 149, 249, 349 recess / edge , 150, 250, 350 projection , 151 , 251 , 351 hold-down section 2 guide slot 3 guide slot 9 edge 2 guide slot 3 guide slot A working direction

[0093] M Mounting direction

[0094] S Longitudinal axis of the screw

[0095] X Longitudinal axis

[0096] Y transverse axis

[0097] Z vertical axis

Claims

cutter bar Claims 1 . Mower bar (1, 101, 201, 301) comprising: a finger bar (2, 102, 202, 302), a mower finger arrangement (3, 4, 5, 103, 104, 105, 203, 204, 205, 303, 304, 305) which has a fastening section (8, 108, 208, 308) with which the mower finger arrangement (3, 4, 5, 103, 104, 105, 203, 204, 205, 303, 304, 305) is fastened to the finger bar (2, 102, 202, 302), wherein in the fastening section (8, 108, 208, 308) a a front side (12, 112, 212, 312) of the fastening section (8, 108, 208, 308) is formed with an open fastening slot (10, 110, 210, 310) extending in an assembly direction (M), and a fastening arrangement (6, 106, 206, 306) with a clamping bolt (14, 114, 214, 314), wherein the mowing finger arrangement (3, 4, 5, 103, 104, 105, 203, 204, 205, 303, 304, 305) with the fastening slot (10, 110, 210, 310) in the assembly direction (M) transversely to a longitudinal axis of the clamping bolt (14, 114, 214, 314) is pushed onto the clamping bolt (14, 114, 214, 314),such that the clamping bolt (14, 114, 214, 314) passes through the fastening slot (10, 110, 210, 310) of the fastening section (8, 108, 208, 308), and wherein the fastening section (8, 108, 208, 308) and the fastening arrangement (6, 106, 206, 306) are fastened to the finger bar (2, 102, 202, 302) by means of the clamping bolt (14, 114, 214, 314), characterized in that the fastening section (8, 108, 208, 308) of the mowing finger arrangement (3, 4, 5, 103, 104, 105, 203, 204, 205, 303, 304, 305) and the fastening arrangement (6, 106, 206, 306) have form-locking elements (49, 50, 149, 150, 249, 250, 349, 350) which are in engagement with one another., 2. Mower bar (1, 201) according to claim 1, characterized in that the form-locking elements are a combination of a recess (49, 249) and a projection (50, 250) which are arranged opposite one another parallel to a longitudinal axis (S) of the clamping bolt (14, 214).

3. Mower bar (101, 301) according to claim 1, characterized in that the form-locking elements are a combination of an edge (149, 349) of the fastening arrangement (106, 306) and a projection (150, 350) of the mowing finger arrangement (103, 104, 105, 303, 304, 305), wherein the projection (150, 350) of the mowing finger arrangement (103, 104, 105, 303, 304, 305) engages behind the edge (149, 349) of the fastening arrangement (106, 306).

4. Mower bar (1, 101, 201, 301) according to one of claims 1 to 3, characterized in that the fastening arrangement (6, 106, 206, 306) has a bracket (32, 132, 232, 332) via which the fastening section (8, 108, 208, 308) of the mower finger arrangement (3, 4, 5, 103, 104, 105, 203, 204, 205, 303, 304, 305) is at least indirectly clamped against the finger bar (2, 102, 202, 302) by means of the clamping bolt (14, 114, 214, 314).

5. Mower bar (1, 101, 201, 301) according to claim 4, characterized in that the bracket (32, 132, 232, 332) is displaceable parallel to a longitudinal axis (S) of the clamping bolt (14, 114, 214, 314) and / or is designed to be elastic.

6. Mower bar (1, 101, 201, 301) according to claim 4 or 5, characterized in that the fastening section (8, 108, 208, 308) is clamped at least indirectly between the bracket (32, 132, 232, 332) and the finger bar (2, 102, 202, 302).

7. Mower bar (1, 101, 201, 301) according to one of claims 4 to 6, characterized in that a receptacle (43, 143, 243, 343) is formed between the bracket (32, 132, 232, 332) and the finger bar (2, 102, 202, 302), in which receptacle the fastening section (8, 108, 208, 308) of the mower finger arrangement (3, 4, 5, 103, 104, 105, 203, 204, 205, 303, 304, 305) is received.

8. Mower bar (1, 101, 201, 301) according to claim 7, characterized in that the bracket (32, 132, 232, 332) has a holding section (47, 147, 247, 347), wherein the receptacle (43, 143, 243, 343) is arranged between the holding section (47, 147, 247, 347) and the finger bar (2, 102, 202, 302).

9. Mower bar (1, 101) according to claim 8, characterized in that the bracket (32, 132) has a support section (46, 146) laterally from the receptacle (43, 143, 243, 343), which is supported at least indirectly against the finger bar (2, 102) without the interposition of the fastening section (8, 108) of the mower finger arrangement (3, 4, 5, 103, 104, 105).

10. Mower bar (1, 101, 201, 301) according to one of claims 4 to 9, characterized in that the clamping bolt (14, 114, 214, 314) passes through an opening in the bracket (32, 132, 232, 332) and through an opening in the finger bar (2, 102, 202, 302) and is supported on opposite sides of the finger bar (2, 102, 202, 302). 11 . Mower bar (1, 101, 201, 301) according to claim 10, characterized in that the mowing finger arrangement (3, 4, 5, 103, 104, 105, 203, 204, 205, 303, 304, 305) has, in addition to the said fastening section (8, 108, 208, 308), a further fastening section (9, 109, 209, 309), that in the further fastening section (9, 109, 209, 309) a fastening slot (11, 111, 211, 311) is formed which is open to an end face of the further fastening section (9, 109, 209, 309), that the fastening arrangement (6, 106, 206, 306) comprises two clamping bolts (14, 114, 214, 314; 15, 115, 215, 315), each passing through one of the fastening slots (10, 110, 210, 310; 11, 111, 211, 311) of the two fastening sections (8, 9, 108, 109, 208, 209, 308, 309), and that the clamping bolts (14, 114, 214, 314;15, 115, 215, 315) each extend through an opening in the bracket (32, 132, 232, 332) and through an opening in the finger beam (2, 102, 202, 302) and are each supported on opposite sides of the finger beam (2, 102, 202, 302); 12. Mower bar (1, 101) according to one of claims 1 to 11, characterized in that the mowing finger arrangement (3, 4, 5, 103, 104, 105) has a fixing section (27, 127), that the fastening section (8, 108) and the fixing section (27, 127) are arranged on different sides of the finger bar (2, 102) and are fastened to the finger bar (2, 102) by means of a common clamping bolt (14, 114), and that the clamping bolt (14, 114) extends through the fastening slot (10; 110) of the fastening section (8, 108) and through the fastening slot (28; 128) of the fixing section (27, 127).

13. Mower bar (1, 101, 201, 301) according to one of claims 1 to 12, characterized in that the clamping bolt is a screw (14, 114, 214, 314) which is axially supported on one side of the finger bar (2, 102, 202, 302) via a screw head (36, 136, 236, 336) and is supported on an opposite side of the finger bar (2, 102, 202, 302) via a screw nut (17, 117, 217, 317) against the finger bar (2, 102, 202, 302).

14. Mower bar (1, 101, 201, 301) according to claim 13, characterized in that the screw (14, 114, 214, 314) is supported in one of the fastening slots against rotation about a longitudinal axis (S) of the screw (14, 114, 214, 314).

15. Mower bar (1, 101, 201, 301) according to one of claims 1 to 14, characterized in that the fastening section (8, 108, 208, 308) of the mower finger arrangement (3, 4, 5, 103, 104, 105, 203, 204, 205, 303, 304, 305) is clamped against the finger bar (2, 102, 202, 302) indirectly via a guide plate (34, 134, 234, 334) for guiding the mower blade (7, 107, 207, 307).

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