DK173964B1

DK173964B1 - Mowing machine

Info

Publication number: DK173964B1
Application number: DK199301173A
Authority: DK
Inventors: Horst Neuerburg; Rino Ermacora
Original assignee: Kuhn Sa
Priority date: 1986-02-27
Filing date: 1993-10-18
Publication date: 2002-03-18
Also published as: DK117393D0; DK117493D0; DK117393A; DK117493A; DK173965B1

Description

i DK 173964 B1in DK 173964 B1

Den foreliggende opfindelse angår en slåmaskine, der omfatter roterende skæreorganer med mindst et skæreredskab, hvoraf mindst ét af de roterende skæreorganer er drevet ved hjælp af transmissionsorganer, som er anbragt i en 5 skærm, der forløber under disse roterende skæreorganer, hvilken skærm blandt andet omfatter moduler, der hver især omfatter et hus (26), hvori et roterende skæreorgan er drejeligt lejret, et mellemstykke, der forløber mellem dette hus og et nærliggende moduls hus samt to flanger, 10 hvoraf en første forløber ved siden af huset, og den anden forløber ved den ende af mellemstykket, som er fjernest fra huset, hvilke flanger, som omfatter mindst en flig, er beregnet til at forbinde to nærliggende moduler med hinanden ved hjælp af monteringstrækstænger, som for-15 løber samtidig gennem den forreste del og bageste del af den første flange på et modul og den anden flange på et nærliggende modul, hvilke flanger hver især omfatter en flig, der udviser en anlægsflade, hvorpå de tilsvarende monteringstrækstænger kommer i anlæg, og en flig, der ud-20 viser en kontaktflade, hvilken kontaktflade på et moduls første flange er beregnet til at være i kontakt med kontaktfladen på et nærliggende moduls anden flange, der forløber ved siden af et lodret plan, der omfatter rotationsaksen for det tilsvarende skæreorgan og vinkelret på 25 skærmens længdeakse, modsat den side, hvor det tilsvarende mellemstykke forløber.The present invention relates to a mower comprising rotary cutting means having at least one cutting tool, at least one of which of the rotary cutting means is driven by transmission means arranged in a screen extending under these rotary cutting means, which screen comprises, among others, modules each comprising a housing (26) in which a rotary cutting member is pivotally mounted, a spacer extending between said housing and a neighboring module housing, and two flanges, 10 of which a first extends adjacent the housing, and the second extending at the end of the spacer furthest from the housing, which flanges comprising at least one tab are intended to connect two adjacent modules with one another by means of mounting pull rods extending simultaneously through the front and rear members. of the first flange of a module and the second flange of a neighboring module, each of which comprises a tab which shows a contact surface on which the corresponding mounting draw rods come into contact, and a tab showing a contact surface, which contact surface of a module's first flange is intended to be in contact with the contact surface of a neighboring module's second flange extending at the side of a vertical plane comprising the axis of rotation of the corresponding cutting member and perpendicular to the longitudinal axis of the screen, opposite to the side where the corresponding middle piece extends.

En sådan slåmaskine er beskrevet i EP-A-0 171 341. Denne kendte slåmaskine omfatter en skærm, der navnlig består 30 af moduler, som hver især omfatter et hus, hvor et skæreorgan er drejeligt lejret, et mellemstykke, der forløber mellem dette hus og et nærliggende moduls hus, samt to DK 173964 B1 2 flanger, hvoraf den forste forløber ved huset, og den anden forløber ved den ende af mellemstykket, som er fjernest fra huset. Disse flanger er beregnet til at forbinde de nævnte nærliggende moduler med hinanden ved hjælp af 5 tre monteringsbolte, hvoraf den første forløber gennem to flangers forreste del, og de to andre forløber gennem flangernes bageste del.Such a mower is described in EP-A-0 171 341. This known mower comprises a screen consisting in particular of modules, each comprising a housing in which a cutting member is pivotally mounted, an intermediate piece extending between this housing and a neighboring module housing, as well as two flanges, the first extending at the housing and the other extending at the end of the spacer which is farthest from the housing. These flanges are intended to connect said adjacent modules to each other by means of three mounting bolts, the first of which extends through the front portion of two flanges and the other two extends through the rear portion of the flanges.

Denne kendte slåmaskine er fordelagtig, idet den har en 10 skærm med en meget interessant konstruktion. Således vil skærmens konstruktion med modulkarakter gøre det muligt at fremstille slåmaskiner med forskellig arbejdsbredde, samtidig med at de specifikke elementer for hver arbejds-bredde reduceres eller udelukkes. Fremstillingen af så-15 danne slåmaskiner er således meget let og gør det muligt at frembringe et bredt udsnit af slåmaskiner til meget interessante omkostninger.This known mower is advantageous in that it has a 10 screen with a very interesting construction. Thus, the modular design of the screen will enable mowers of different working widths to be manufactured, while at the same time reducing or excluding the specific elements for each working width. The production of such mowers is thus very easy and makes it possible to produce a wide range of mowers at very interesting costs.

Det har imidlertid vist sig, at modulernes huse på denne 20 kendte slåmaskine kan undergå meget betydelige deformationer til skade for de deri indeholdte organers funktionsevne, hvilke organer tjener til at styre de tilsvarende skæreorganer og bringe dem i rotation.However, it has been found that the housings of the modules on this known mower can undergo very significant deformations to the detriment of the functioning of the members contained therein, which serve to guide the corresponding cutting means and rotate them.

25 Der kan for øvrigt ligeledes opstå problemer med monteringsboltene, som til tider ikke er i stand til at modstå de trækkræfter, der virker på dem under brugen af slåmaskinen.25 Moreover, problems can also arise with the mounting bolts, which are sometimes unable to withstand the pulling forces acting on them during the use of the mower.

30 Med udgangspunkt i denne kendte slåmaskine er det formålet med nærværende opfindelse at forbedre flangernes form, således at deformationerne af husene bliver meget DK 173964 B1 3 begrænsede, samtidig med at det bliver muligt at forøge samlingsorganernes styrke.Based on this known mower, the object of the present invention is to improve the shape of the flanges so that the deformations of the housings become very limited, while at the same time increasing the strength of the collecting members.

Med dette formål for øje er slåmaskinen ifølge den fore-5 liggende opfindelse særpræget ved, at anlægsfladen på et moduls første flange forløber ved siden af det lodrette plan, hvor også det tilsvarende mellemstykke forløber, og at monteringstrækstængerne, der forbinder dette modul og et nærliggende modul med hinanden, kun er tilvejebragt i 10 et antal på to, hvoraf den ene forløber gennem den forreste del af de respektive flangers flige, og den anden forløber gennem den bageste del af disse.For this purpose, the mower according to the present invention is characterized in that the abutment surface of a first flange of a module extends adjacent to the vertical plane, where also the corresponding intermediate section extends, and that the mounting drawbars connecting this module and a neighboring module with each other is provided only in a number of two, one of which extends through the front of the tabs of the respective flanges, and the other extends through the rear of these.

I kraft af at hvert moduls første flange har denne helt 15 særlig form, bliver de kræfter, der virker på dem såvel ved brug som under transport, godt overført til modulet ved huset, som indeholder organerne til styring og rotering af de tilsvarende roterende skæreorganer, uden at det pågældende hus udsættes for deformationer, der er 20 skadelige for styre- og drivorganernes funktionsevne. Ved opfindelsen er det samtidig forudset, at monteringstrækstængerne svarende til to nærliggende moduler kun skal tilvejebringes i et antal på to, hvoraf den ene forløber gennem de respektive flangers fliges forreste del og den 25 anden gennem deres bageste del. Dette gør det for det første muligt at forøge deres respektive diametre, men samtidig muliggør det sammen med den første flanges særlige form en forøgelse af deres længde, uden at monteringstrækstangen, der går gennem flangernes fliges forre-30 ste del, generer slåmaskinens funktionsevne.Due to the fact that each module's first flange has this very special shape, the forces acting on them both during use and during transport are well transferred to the module at the housing which contains the means for controlling and rotating the corresponding rotary cutting means. without subjecting the housing to deformations which are detrimental to the functioning of the steering and drive means. The invention also contemplates that the mounting drawbars corresponding to two adjacent modules are to be provided only in a number of two, one extending through the front portion of the respective flanges and the other through their rear portion. This allows, in the first instance, to increase their respective diameters, but at the same time together with the special shape of the first flange, it allows an increase in their length, without the mounting pull rod passing through the front part of the flanges causing the mower to function.

DK 173964 B1 4DK 173964 B1 4

Ifølge et yderligere særpræg ved opfindelsen kan et moduls første flange være større end dettes anden flange.According to a further feature of the invention, the first flange of a module may be larger than its second flange.

Et moduls første flange, det nærliggende moduls anden flange samt de to monteringstrækstænger, der forbinder 5 disse to flanger med hinanden, kan således forløbe under det tilsvarende skæreorgan.Thus, the first flange of a module, the second flange of the adjacent module, and the two mounting drawbars connecting these two flanges to each other may thus extend under the corresponding cutting means.

Opfindelsen kan endvidere være særpræget ved, at et moduls to flangers flige på et modul for og bag er forsynet 10 med en udsparing, der tjener til passage for monteringstrækstængerne, og at de forreste udsparingers fællesakse samt de bageste udsparingers fællesakse forløber i det mindste tilnærmelsesvis omkring det i det væsentlige vandrette midterplan for hver flanges kontaktflade.The invention may further be characterized in that the flanges of a module of two modules on a module front and rear are provided with a recess which serves to pass for the mounting drawbars and that the joint axis of the front recesses and the joint axis of the rear recesses at least approximately the substantially horizontal center plane of the contact surface of each flange.

1515

Det er kendt at forsyne skærmen på en slåmaskine, som har roterende, nedefra drevne skæreorganer, med en beskyttelsessko under hvert af disse skæreorganer. Denne omfatter sædvanligvis en forreste del, som set nedefra har en til-20 nærmelsesvis cirkulær form for at beskytte det tilsvarende skæreorgan, samt en plade, der forløber under skærmen.It is known to provide the screen of a mower having rotary, bottom-driven cutting means with a protective shoe under each of these cutting means. This usually comprises a front portion, which is seen from the bottom in a substantially circular shape to protect the corresponding cutting member, as well as a plate extending below the screen.

At planterester eventuelt hænger fast i flangernes forkant samt i de forreste monteringstrækstænger, kan undgås, når et moduls første flange og et nærliggende moduls 25 anden flange samt den monteringstrækstang, der forløber gennem den forreste del af disse to flanger, forløber i det mindste tilnærmelsesvis inden i den tilsvarende beskyttelsesskos forreste del.Plant residues possibly attached to the leading edge of the flanges as well as to the front mounting drawbars can be avoided when the first flange of a module and a second module 25 of the adjacent module, as well as the mounting drawbar extending through the front of these two flanges, extend at least approximately before in the front of the corresponding protective shoe.

30 Opfindelsen kan yderligere være særpræget ved, at hver flanges anlægsflade i niveau med hver monteringstrækstang har form som en del af en cylindrisk overflade, og at denThe invention may be further characterized in that the abutment surface of each flange is at the level of each mounting drawbar as a part of a cylindrical surface and that the

DK 173964 B1 IDK 173964 B1 I

5 tilsvarende monteringstrækstangs flade, der er beregnet til at komme i anlæg med denne anlægsflade, ligeledes har form som en del af en cylindrisk overflade med en størrelse, som i det mindste tilnærmelsesvis er identisk med 5 denne anlægsflades størrelse. Således forøger man overfladen af flangernes anlægsflade uden tilsvarende at forøge skærmens tykkelse.5 corresponding mounting drawbar surface, which is intended to come into contact with this contact surface, also has the shape of a part of a cylindrical surface of a size which is at least approximately identical to the size of this contact surface. Thus, the surface of the contact surface of the flanges is increased without correspondingly increasing the thickness of the screen.

Med fordel kan hver flanges anlægsflade med form som en 10 del af en cylindrisk overflade have en krumning rettet mod denne flanges kontaktflade. Det er således muligt at fremstille anlægsfladen meget præcist, således at kontakten mellem denne og den tilsvarende monteringstrækstangs flade, der er beregnet til at være i kontakt med denne 15 anlægsflade, bliver optimal med henblik på, at skærmen får en god styrke efter indbyrdes samling af de forskellige moduler.Advantageously, the contact surface of each flange, in the form of a portion of a cylindrical surface, may have a curvature directed toward the contact surface of that flange. Thus, it is possible to produce the abutment surface very precisely so that the contact between the abutment and the corresponding mounting rod surface, which is intended to be in contact with this abutment surface, is optimized in order to give the screen a good strength after mutual assembly of the abutment. the various modules.

Monteringstrækstængerne kan med fordel hver bestå af en 20 stangskrue, to mellemlægsskiver og en møtrik.Advantageously, the mounting tension rods can each consist of a 20 rod screw, two spacers and a nut.

Når flangernes anlægsflade skal have form som en del af en cylindrisk overflade, er det en fordel, at en tilsvarende monteringstrækstangs flader, som skal være i kon-25 takt med disse anlægsflader, er tilvejebragt på de to mellemlægsskiver.When the contact surface of the flanges is to be shaped as part of a cylindrical surface, it is advantageous that the surfaces of a corresponding mounting drawbar, which must be in contact with these contact surfaces, are provided on the two spacers.

Når et modul omfatter mindst én del, imod hvilken mindst én side af en respektiv møtrik kommer i anlæg, forhindres 30 denne møtrik automatisk i at rotere under indskruning og udskruning. Det er således ikke nødvendigt at anvende et DK 173964 B1 6 værktøj til at forhindre skruens rotation, hvilket i høj grad letter montagen af modulerne.When a module comprises at least one part against which at least one side of a respective nut comes into contact, this nut is automatically prevented from rotating during screwing and unscrewing. Thus, it is not necessary to use a DK 173964 B1 6 tool to prevent the rotation of the screw, which greatly facilitates assembly of the modules.

For at hindre rotationen effektivt, samtidig med at der 5 tillades et vist spillerum mellem møtrikkens side og den pågældende del af modulet i overensstemmelse med de generelle støbetolerancer, kan møtrikken med fordel have form som en kvadrat. En sådan møtriks side har således en forholdsvis stor længde, således at rotationen hele tiden 10 fuldstændig forhindres.To effectively prevent rotation while allowing some clearance between the side of the nut and that part of the module in accordance with the general molding tolerances, the nut may advantageously take the form of a square. Thus, the side of such a nut has a relatively large length, so that the rotation is always completely prevented.

Det kan ligeledes være et særpræg, at hver monteringstrækstang har et rundt hoved, som er forsynet med en central sekskantet udsparing. Dette gør det muligt at sikre 15 skærmens kompakthed uden derved at skade enkelheden ved montagen. Det er faktisk ganske let at nå stangskruens hoved med et værktøj som f.eks. en pneumatisk skruetrækker .It may also be a distinctive feature that each mounting drawbar has a round head, which is provided with a central hexagonal recess. This makes it possible to ensure the compactness of the screen without damaging the simplicity of installation. It is actually quite easy to reach the head of the bar screw with a tool such as a pneumatic screwdriver.

20 Det kan endvidere med fordel være et særpræg, at et moduls hus og mellemstykke udgør én enkelt del.20 It may further advantageously be a distinctive feature that a module housing and intermediate piece constitute a single part.

Opfindelsen vil herefter blive forklaret nærmere under henvisning til den medfølgende tegning, hvor 25 fig. 1 viser et billede, set ovenfra, af en knivstang til en slåmaskine ifølge opfindelsen, fig. 2 et billede, der er set ovenfra og i forstørret må-30 lestok og delvis i snit, følgende planet II (i fig. 3) af den i fig. 1 viste knivstang uden skæreorganer, DK 173964 B1 7 fig. 3 et snit følgende planet III {i fig. 2) gennem den i fig. 2 viste knivstang, fig. 4 et snit følgende planet IV (i fig. 2) gennem den i 5 fig. 2 viste knivstang,.The invention will now be explained in more detail with reference to the accompanying drawing, in which: FIG. 1 is a plan view of a knife bar for a mower according to the invention; FIG. 2 is a plan view, enlarged in scale and partly in section, of the plane II (in FIG. 3) of the FIG. 1, shown in Fig. 1, without cutting means, FIG. 3 is a sectional view of the plane III {in FIG. 2) through the embodiment shown in FIG. 2; FIG. 4 is a sectional view of plane IV (in FIG. 2) through the FIG. 2, shown.

fig. 5 et snit følgende planet V (i fig. 2) gennem den i fig. 2 viste knivstang, og 10 fig. 6 et snit følgende planet VI (i fig. 2) gennem den i fig. 2 viste knivstang.FIG. 5 is a sectional view of the plane V (in FIG. 2) through the FIG. 2, and FIG. 6 is a sectional view of the plane VI (in FIG. 2) through the FIG. 2.

Inden beskrivelsen af de forskellige figurer påbegyndes, er der grund til at bemærke, at beskrivelsen er udfærdi-15 get under den forudsætning, at slåmaskinens knivstang hviler på et vandret plan ligesom under brug. Begreberne vandret og lodret er dermed klart definerede. I øvrigt vil oversiden af knivstangen være den af dens sider, hvor skæreorganerne forløber. Udtrykkene "på", "under", "for 20 oven", "for neden", "øvre" og "nedre" er således lige så klart definerede. Endelig er forsiden af knivstangen den af dens sider, hvor skæreorganerne skal skære det emne, som skal høstes ved brug af slåmaskinen. Udtrykkene "for", "bag" "foran" og "bagved" er dermed ligeledes 25 klart definerede.Before beginning the description of the various figures, there is reason to note that the description is made on the condition that the mower's cutting rod rests on a horizontal plane as in use. The concepts horizontal and vertical are thus clearly defined. Incidentally, the upper side of the cutter bar will be that of its sides where the cutting means extend. Thus, the terms "on", "below", "for 20 above", "for below", "upper" and "lower" are equally clearly defined. Finally, the front of the knife bar is that of its sides where the cutting means must cut the workpiece to be harvested using the mower. The terms "in front", "behind" "in front" and "behind" are thus also clearly defined.

I fig. 1 vises en slåmaskine eller mere nøjagtigt en slåmaskines knivstang 1. Denne knivstang 1 omfatter fire skæreorganer 2,3, der hver drejer omkring en akse 37, der 30 er rettet opefter. Hvert skæreorgan 2,3 er forsynet med to skæreredskaber 4, som er monteret diametralt modstillet på det ydre kantområde af skæreorganet 2,3. Skærered- DK 173964 B1 8 skaberne 4's montering på skæreorganerne 2,3 er fortrinsvis tilvejebragt på en sådan måde, at skæreredskaberne 4 er udstrakt udefter under indflydelse fra centrifugalkraften, og således at de kan svinges bagud, når de møder 5 en forhindring under deres rotation. Skæreorganet 3, som er anbragt ved knivstangen l's højre ende 5, set i ar-bejdsretningen, som er defineret af en pil 6, er overlejret af en kappe 7. Denne kappe 7 samvirker med en indretning til reduktion af skåren af afskåret foder, som for 10 eksempel et s kårlægningsbræt 8 på en sådan måde, at skåren af afskåret foder er adskilt fra det foder, som endnu er på fode.In FIG. 1, a mower or, more precisely, a mower's knife bar 1 is shown. This knife bar 1 comprises four cutting means 2,3, each rotating about an axis 37 directed upwards. Each cutting member 2,3 is provided with two cutting tools 4 which are mounted diametrically opposed to the outer edge region of the cutting member 2,3. Cutting tools 4 The mounting of the cutters 4 on the cutting means 2,3 is preferably provided in such a way that the cutting tools 4 are extended outwards under the influence of centrifugal force and so that they can be swung backwards when they encounter 5 an obstacle during their rotation. . The cutting member 3, located at the right end 5 of the cutter bar 1, seen in the working direction, defined by an arrow 6, is overlaid by a sheath 7. This sheath 7 cooperates with a device for reducing the cut of cut fodder which for example, a cutting board 8 in such a way that the cut of cut feed is separated from the feed which is still on the foot.

Skæreorganerne 2,3 er drejeligt lejret i en skærm 9, som 15 er anbragt under skæreorganerne 2,3. Skærmen 9 er dannet af en række moduler 10.The cutting means 2,3 are rotatably mounted in a screen 9 which is arranged under the cutting means 2,3. The screen 9 is formed by a series of modules 10.

Ved den højre ende 5 af knivstangen 1 er skærmen 9 forsynet med et endemodul 11, der forløber tilnærmelsesvis til 20 den ydre bane, som beskrives af skæreorganet 3, eller lidt forbi nævnte bane. Ved den venstre ende 12 er skærmen 9 forsynet med et vendehus 13.At the right end 5 of the cutter bar 1, the screen 9 is provided with an end module 11 extending approximately to the outer web as described by the cutting member 3, or slightly past said web. At the left end 12, the screen 9 is provided with a turning housing 13.

I skærmen 9 er der anbragt transmissionsorganer 14, som 25 for eksempel en transmissionsaksel, der samvirker med ikke viste tandhjul med henblik på at bringe skæreorganerne 2,3 i rotation. Disse transmissionsorganer 14’s rotation er tilvejebragt ved hjælp af en drivmekanisme, som er anbragt i vendehuset 13, og som er kendt for en fagmand på 30 området. Denne drivmekanisme modtager bevægelse fra en remskive 15, som er fastkilet på en aksel 16. Remskiven 15 drives ved hjælp af en anden ikke vist remskive ved DK 173964 B1 9 hjælp af remme 17. Denne anden remskive er på en måde, der er kendt for en fagmand, drevet ved hjælp af kraftudtaget for en ikke vist traktor, hvortil slåmaskinen er tilkoblet ved hjælp af en ikke vist kardanaksel.In the screen 9, transmission means 14 are provided, such as 25, for example, a transmission shaft which cooperates with gears not shown to rotate the cutting means 2,3. The rotation of these transmission means 14 is provided by a drive mechanism located in the turning housing 13 and known to a person skilled in the art. This drive mechanism receives movement from a pulley 15 which is wedged on a shaft 16. The pulley 15 is driven by another pulley not shown by DK 173964 B1 9 by means of belts 17. This second pulley is in a manner known for one skilled in the art, powered by the power take-off of a tractor not shown, to which the mower is connected by means of a shaft not shown.

55

Vendehuset 13 omfatter to cylindriske lejer 18, der er tilnærmelsesvis koncentriske med vendehuset 13’s indgangsaksel 16. Disse cylindriske lejer 18 understøtter en bøjle 19, som er fastgjort til et chassis 20, ved hjælp 10 af hvilket slåmaskinen er tilkoblet traktoren. Med dette arrangement kan knivstangen 1 følge jordens uregelmæssigheder, idet den vipper omkring aksen for de cylindriske lejer 18, uden de forskellige drivorganer bliver udsat for yderligere belastninger. Endvidere er det muligt at 15 svinge knivstangen 1 op til en tilnærmelsesvis lodret stilling for at reducere slåmaskinens bredde under vejtransport .The turning housing 13 comprises two cylindrical bearings 18 which are approximately concentric to the input shaft 16. The cylindrical bearings 18 support a bracket 19 which is secured to a chassis 20 by means of which the mower is connected to the tractor. With this arrangement, the knife bar 1 can follow the irregularities of the earth as it tilts about the axis of the cylindrical bearings 18 without the additional drive means being subjected to additional loads. Furthermore, it is possible to pivot the cutter bar 1 up to an approximately vertical position to reduce the width of the mower during road transport.

Ved skærmen 9's venstre ende 12 og under denne eller mere 20 nøjagtigt under vendehuset 13 er der arrangeret en sko 21, som har en forreste del 22, der er opefter bøjet, således som forenden af en ski. Denne sko 21 gør det muligt for slåmaskinen at glide over jorden under arbejdet, og at undgå fasthængning af afskåret foder på vendehuset 13.At the left end 12 of the screen 9 and below this or more 20 exactly below the turning housing 13 is arranged a shoe 21 having a front portion 22 bent upwardly, such as the front of a ski. This shoe 21 allows the mower to slide over the ground during work and to avoid clamping of cut fodder on the turning house 13.

2525

Ved forenden under hvert skæreorgan 2,3 er skærmen 9 forsynet med beskyttelsessko 23. Disse beskyttelsessko 23 omfatter en forreste del 24, der, således som set ovenfra, har en tilnærmelsesvis cirkulær form, hvor radius er 30 større end radiussen for skæreorganernes 2,3 ydre bane, men mindre end radiussen for skæreredskaberne 4’s ydre bane.At the front end of each cutting member 2.3, the screen 9 is provided with protective shoe 23. These protective shoes 23 comprise a front portion 24 which, as seen from above, has an approximately circular shape, the radius of which is greater than the radius of the cutting means 2,3. outer web, but less than the radius of the outer web 4 of the cutting tools.

DK 173964 B1 10DK 173964 B1 10

Endvidere omfatter beskyttelsesskoene 23 en bageste del 25 med medeform, hvormed knivstangen 1 hviler på jorden under arbejdet.Furthermore, the protective shoes 23 comprise a rear part 25 of co-shape, with which the knife rod 1 rests on the ground during work.

5 I fig. 2-6 ses mere detaljeret arrangementet for forbindelsen mellem de forskellige moduler 10, som udgør knivstangen l's skærm 9.5 In FIG. 2-6, the arrangement for the connection between the various modules 10 constituting the screen 9 of the knife rod 1 is shown in more detail.

10 Hvert af disse moduler 10 udgøres af et hus 26, hvori det tilsvarende skæreorgan 2,3 er drejeligt lejret, og af et mellemstykke 27, der er udstrakt mellem huset 26 og huset 26 for et nærliggende modul 10. Et modul 10's hus 26 og mellemstykke 27 udgøres i den viste udførelsesform af én, 15 for opfindelsen ikke begrænsende måde, enkelt del.Each of these modules 10 is constituted by a housing 26 in which the corresponding cutting member 2,3 is rotatably mounted, and by an intermediate piece 27 extending between the housing 26 and the housing 26 for a neighboring module 10. The housing 26 of a module 10 and spacer 27, in the illustrated embodiment, constitutes one, 15 non-restrictive, single portion of the invention.

De forskellige moduler 10 er indbyrdes forbundne ved hjælp af monteringstrækstænger 28. Med henblik herpå omfatter hvert modul 10 ved hver af sine ender en flange 20 29,30, og to nærliggende moduler 10's flanger 29, 30 er indbyrdes forbundet med to monteringstrækstænger 28.The various modules 10 are interconnected by means of mounting tension rods 28. For this purpose, each module 10 at each of its ends comprises a flange 20 29.30, and the flanges 29, 30 of two adjacent modules 10 are interconnected by two mounting tension rods 28.

Som det fremgår af de forskellige figurer, omfatter den af hvert modul 10’s flanger 29, som forløber på siden af 25 det tilsvarende hus 26, to flige 31,32, og den af modulet 10's flanger 30, som forløber på det tilsvarende mellemstykke 27 fjernest fra det tilsvarende hus 26, omfatter to flige 33,34. Flangernes 29,30 flige 31,32,33,34, der forløber ved modulerne 10’s forside og bagside, er rettet 30 på tværs i forhold til skærmen 9's længdeakse 48, fortrinsvis tilnærmelsesvis i arbejdsretningen 6 (dvs. i det mindste tilnærmelsesvis vinkelret på skærmen 9’s længde- DK 173964 B1 11 akse 48 set ovenfra) og er udstrakt tilnærmelsesvis lodret .As can be seen from the various figures, the flanges 29 of each module 10 extending on the side of the corresponding housing 26 comprise two tabs 31,32 and the flanges 30 of the module 10 extending on the corresponding intermediate piece 27 farthest from the corresponding housing 26, two tabs include 33.34. The flaps 31,32,33,34 of the flanges 29,30 extending at the front and rear of the modules 10 are directed transversely to the longitudinal axis 48 of the screen 9, preferably approximately in the working direction 6 (i.e., at least approximately perpendicular to the screen 9's longitudinal view (axis 17, 48 from above) and is approximately vertical.

Endvidere forløber de i en given afstand fra hinanden.Furthermore, they extend at a given distance from one another.

5 Således har den flange 29, der er anbragt ved den side, hvor et modul 10’s hus 26 er tilvejebragt, sin flig 31, hvorimod monteringstrækstænger 28 er anbragt i anlæg, på den samme side af det lodrette plan 36 vinkelret på skærmen 9's længdeakse 48 og gennem det i det pågældende hus 10 26 styrede skæreorgan 2,3's rotationsakse 37 som det til svarende mellemstykke 27, medens dens anden flig 32, der skal i kontakt med det nærliggende modul 10's flange 30’s flig 34, er anbragt på den anden side af nævnte lodrette plan 36. Således forløber den overflade 57 af flange 29’s 15 flig 31, som danner anlæg for de tilsvarende monteringstrækstænger 28, på samme side af nævnte lodrette plan 36 som det tilsvarende mellemstykke 27, medens den overflade 50 af nævnte flange 29's flig 32, som er beregnet til at komme i kontakt med kontaktfladen 51 på det nærliggende 20 modul 10's flange 30's flig 34, forløber på den anden side af nævnte plan 36. På denne måde overføres påvirkninger sikkert til modulet 10 i området ved huset 26 uden i for høj grad at deformere huset 26.5 Thus, the flange 29 disposed at the side where the housing 26 of a module 10 is provided has its tab 31, whereas mounting pull rods 28 are mounted on the same side of the vertical plane 36 perpendicular to the longitudinal axis 48 of the screen 9 and through the rotary axis 37 of the cutting member 2,3 in said housing 10 26 as the corresponding spacer 27, while its second tab 32, which is in contact with the tab 34's tab 34 of the adjacent module 10, is placed on the other side of said vertical plane 36. Thus, the surface 57 of the flap 31 of flange 29 which forms abutments for the corresponding mounting rods 28 extends on the same side of said vertical plane 36 as the corresponding intermediate piece 27, while the surface 50 of said flange 29 of said flange 32 , which is intended to come into contact with the contact surface 51 of the tab 34 of the adjacent flange 30 of the flange 30, extends on the other side of said plane 36. In this way, securely influences the module 10 in the region of the housing 26 without deforming the housing 26 too much.

25 Fligene 33,34 for flangen 30, der er placeret ved den ende af mellemstykket 27, som er fjernest fra huset 26, er ligeledes udstrakt i en given afstand fra hinanden. Den afstand, som adskiller flangen 30's to flige 33,34, er dog meget mindre end den afstand, som adskiller flangen 30 29's to flige 31,32. Dette gør det muligt let at anbringe den forreste del af flangerne 29,30, ligeså vel som monteringstrækstængerne 28, der er anbragt ved forsiden til- DK 173964 B1 12 nærmelsesvis inde i beskyttelsesskoene 23. Man undgår således, at vegetabilsk affald kan forblive fasthængende på flangerne 29,30 og på de forreste monteringstrækstænger 28 .The tabs 33, 34 of the flange 30 located at the end of the spacer 27 which are farthest from the housing 26 are also extended at a given distance from each other. However, the distance separating the two tabs 33,34 of the flange 30 is much smaller than the distance separating the two tabs 31,32 of the flange 30 29. This allows the front portion of the flanges 29, 30 as well as the mounting rods 28, which are placed at the front, to be easily inserted within the protective shoes 23. It is thus avoided that vegetable waste may remain adhered to the flanges 29,30 and on the front mounting tension rods 28.

55

Som nævnt tidligere, er flangerne 29,30 i berøring gennem deres flig 32,34, og fligene 31,33 fungerer som anlægsflader for monteringstrækstængerne 28. På denne måde kan monteringstrækstængerne 28 have en længde, som er til-10 strækkelig til, at de på sikker måde kan modstå de påvirkninger, som de er udsat for, ligesom kontaktfladen 50,51 mellem de to flige 32,34 kan have en overflade, som er tilstrækkelig stor til ikke at blive udsat for deformation (fig. 6), samtidig med at der er tilvejebragt 15 flanger 29,30, som kan være støbt hele.As mentioned earlier, the flanges 29,30 are in contact through their tabs 32.34 and the tabs 31.33 act as abutment surfaces for the mounting drawbars 28. In this way, the mounting pulls 28 can have a length sufficient to allow them to can safely withstand the stresses to which they are subjected, just as the contact surface 50.51 between the two tabs 32, 34 may have a surface sufficiently large not to be subjected to deformation (Fig. 6), 15 flanges 29,30 can be provided which can be cast whole.

Flangerne 29's flige 31,32 er indbyrdes forbundne ved hjælp af to forbindelses flige 38,39, og flangerne 30’s flige 33, 34 er indbyrdes forbundet ved hjælp af forbin-20 delsesflige 40,41. Forbindelsesfligene 38,39,40,41 er rettet på tværs i forhold til arbejdsretningen 6 (dvs. på tværs af de nævnte flige 31,32,33,34) og forløber tilnærmelsesvis vandret. De er endvidere forbundet med modulet 10's legeme. Forbindelsesfligene 38, 40 forløber ved den 25 øvre del af fligene 31,32,33,34, medens forbindelsesfligene 39,41 forløber ved den nedre del af fligene 31,32, 33,34. Forbindelsesfligene 38,39,40,41 er beregnet til i væsentlig grad at begrænse udbøjningen af flangernes 29,30 flige 31,32,33,34.The flanges 31, 32 of the flanges 29 are interconnected by means of two connecting tabs 38,39, and the flanges 30, 33, 34 of the flanges 30 are interconnected by means of connecting tabs 40, 41. The connecting tabs 38, 39, 40, 41 are aligned transversely to the working direction 6 (i.e., across said tabs 31, 32, 33, 34) and extend approximately horizontally. They are also connected to the body of module 10. The connecting tabs 38, 40 extend at the upper 25 of the tabs 31,32,33,34, while the connecting tabs 39,41 extend at the lower portion of the tabs 31,32, 33,34. The connecting tabs 38,39,40,41 are intended to substantially limit the deflection of the flanges 29,30 31,32,33,34.

30 DK 173964 B1 1330 DK 173964 B1 13

Med dette arrangement er flangerne 29,30, ved forsiden og bagsiden og således som set i arbejdsretningen 6, rørformede med et tilnærmelsesvis firkantet tværsnit.With this arrangement, the flanges 29,30, at the front and back, and as seen in the working direction 6, are tubular with an approximately square cross-section.

5 Flangernes 29,30 flige 31,32,33,34 omfatter ved forsiden en åbning 42,43 og ved bagsiden en åbning 44,45. Åbningerne 42,44,43,45 passerer tværs gennem fligene 31,32,33, 34. Således som det fremgår af fig. 2 og 3, er åbningerne 42,43 og 44,45 koaksiale. I fig. 4, 5 og 6 ses desuden, 10 at en fælles akse 46 for de forreste åbninger 42,43 og en fælles akse 47 for de bageste åbninger 44,45 forløber i nærheden af det tilnærmelsesvis vandrette medianplan 49 for kontaktfladen 50,51 for flangernes 29,30 flige 32,34.The tabs 31,32,33,34 of the flanges 29.30 include an opening 42.43 at the front and an opening 44.45 at the rear. The apertures 42, 44, 43, 45 pass transversely through the tabs 31, 32, 33, 34. As shown in FIG. 2 and 3, the openings 42.43 and 44.45 are coaxial. In FIG. 4, 5 and 6, it is further seen that 10 a common axis 46 for the front openings 42,43 and a common axis 47 for the rear openings 44,45 extend in the vicinity of the approximately horizontal median plane 49 of the contact surface 50,51 for the flanges 29 , 30 tabs 32.34.

15 Åbningerne 42,44,43,45, som er udsparet i flangernes 29,30 flige 31,32,33,34, passeres af monteringstrækstæn-gerne 28, der således, set i arbejdsretningen 6, forløber mellem de to forbindelsesflige 38,39,40,41, som forbinder fligene 31,32,33,34. Hver monteringstrækstang 28 udgøres 20 af en stangskrue 52, to mellemlægsskiver 53 og en møtrik 54, der er skruet fast på stangskruen 52's skaft 55. Mellemlægsskiverne 53 er dels placeret mellem stangskruen 52's hoved 56 og flangen 30's flig 33 og dels mellem møtrikken 54 og flangen 29's flig 31. Mellemlægsskiverne 53 25 er fordelagtigt tilvejebragt af stål, fortrinsvis hærdet, for at kontaktfladen mellem stangskruen 52's hoved 56 og mellemlægsskiven 53 ligesom kontaktfladen mellem møtrikken 54 og mellemlægsskiven 53 korrekt kan modstå det tryk, der er frembragt ved møtrikken 54's tilspænding på 30 stangskruen 52 og af de påvirkninger, der optages af stangskruen 52 og møtrikken 54 under arbejdet eller transporten.The openings 42,44,43,45, which are recessed in the tabs 31,32,33,34 of the flanges 29,30, are passed by the mounting tensioners 28 which, as seen in the working direction 6, extend between the two connecting tabs 38,39 , 40.41, which connects the tabs 31,32,33,34. Each mounting drawbar 28 is constituted by a rod screw 52, two spacers 53 and a nut 54 which is screwed onto the shaft 55 of the rod screw 52. The spacers 53 are located partly between the head screw 52 of the rod screw 52 and the flange 33 of the flange 30 and partly between the nut 54 and the flange. Tab 31 of the bar 31. The intermediate washers 53 25 are advantageously provided with steel, preferably hardened, so that the contact surface between the head 56 of the bar screw 52 and the washer 53 can withstand the pressure created by the tightening of the nut 54 as well as the contact surface between the nut 54 and the washer 53. the rod screw 52 and the stresses taken up by the rod screw 52 and the nut 54 during work or transport.

DK 173964 B1 14DK 173964 B1 14

Da flangernes 29,30 flige 31,33 er af støbejern, er fligenes 31,33 anlægsflade 57, der er beregnet til at komme i kontakt med mellemlægsskiverne 53, ifølge den forelig-5 gende opfindelse forøget. Med henblik herpå har anlægsfladen 57 for fligene 31,33 form som en del af en cylindrisk flade, ligesom mellemlægsskiven 53's flade, der er beregnet til at komme i kontakt med anlægsfladen 57 for fligene 31,33, også har form som en del af en cylindrisk 10 flade med en dimension, som er tilnærmelsesvis identisk med den for anlægsfladen 57.Since the flanges 31,33 of the flanges 29.30 are of cast iron, the abutment surface 57 of the flaps 31, which is intended to come into contact with the spacers 53, is increased according to the present invention. To this end, the abutment surface 57 of the tabs 31.33 is shaped as part of a cylindrical surface, as is the surface of the washer 53 intended to come into contact with the abutment surface 57 of the tabs 31,33, also as a part of a cylindrical surface. cylindrical surface having a dimension approximately identical to that of the abutment surface 57.

Således som det fremgår af fig. 2 og 3 er krumningen for fligenes 31, 33 anlægsflade 57 i form af en cylindrisk 15 flade rettet mod fligene 32,34, der fungerer som kontaktflade mellem to nærliggende moduler 10.As shown in FIG. 2 and 3, the curvature of the abutment surface 57 of the tabs 31, 33 is in the form of a cylindrical surface facing the tabs 32,34, which acts as a contact surface between two adjacent modules 10.

Dette muliggør tilvejebringelsen af en meget omhyggeligt udført bearbejdning af fligenes 31,33 anlægsflade 57, så-20 ledes at kontakten mellem fligen 31,33 og mellemlægsskiven 53 er optimal. Således garanteres en god styrke for skærmen 9 efter montering af de forskellige moduler 10.This enables the very careful machining of the abutment surface 57 of the tabs 31, 33, so that the contact between the tab 31,33 and the insert disc 53 is optimal. Thus, a good strength is guaranteed for the screen 9 after mounting the various modules 10.

Aksen 35 for den del af den cylindriske flade, som danner anlægsfladen 57 for flangernes 29,30 flige 31,33, forlø-25 ber fordelagtigt tilnærmelsesvis i arbejdsretningen 6.The axis 35 of the portion of the cylindrical surface forming the abutment surface 57 of the flanges 31,33 of the flanges 29.30 advantageously advances approximately in the working direction 6.

Idet det er givet, at overfladeforøgelsen for fligenes 31,33 anlægsflade 57 er tilvejebragt, således som beskrevet ovenfor, er det muligt at skærmen 9 bibeholder sin 30 fasthed.Given that the surface enhancement of the abutment surface 57 of the tabs 31, 33 is provided, as described above, it is possible that the screen 9 retains its firmness.

DK 173964 B1 15 I fig. 2 og 5 ses endvidere, at den ene side 58 af møtrikken 54 forløber i nærheden af en del 59 af modulet 10. Dette gør det muligt automatisk at blokere møtrikken 54's rotation under indskruningen eller udskruningen, når 5 møtrikken 54's side 58 kommer i anlæg mod modulet 10's del 59. På denne måde er det ikke nødvendigt at anvende et værktøj for at tilvejebringe blokeringen. For at blokeringen skal være tilvejebragt effektivt, samtidig med at der optræder et vist spillerum mellem møtrikken 54' s 10 side 58 og modulet 10’s del 59, som er sammenligneligt med almindelige støbetolerancer, har møtrikken 54 fordelagtigt en kvadratisk form. Møtrikken 54's side 58 har således en relativ stor længde på en sådan måde, at blokeringen altid er effektivt tilvejebragt.DK 173964 B1 In FIG. 2 and 5, it is further seen that one side 58 of the nut 54 extends near a portion 59 of the module 10. This allows the rotation of the nut 54 to be automatically blocked during screwing or unscrewing when the side 58 of the nut 54 comes into contact with part 59 of module 10. In this way, it is not necessary to use a tool to provide the blockage. In order for the blocking to be effected effectively, while there is some clearance between the nut 54's 10 page 58 and the module 59's portion 59, which is comparable to ordinary molding tolerances, the nut 54 advantageously has a square shape. Thus, the side 58 of the nut 54 has a relatively large length in such a way that the blocking is always effectively provided.

15 I fig. 3 og 4 ses desuden, at stangskruerne 52’s hoveder fordelagtigt er runde og fordelagtigt omfatter en central sekskantet udsparing 60. Fordelen ved dette arrangement vil fremgå senere.In FIG. 3 and 4, it is further seen that the head screws 52 are advantageously round and advantageously comprise a central hexagonal recess 60. The advantage of this arrangement will become apparent later.

20 Således som forklaret tidligere, udgøres modulet 10 af et hus 26, hvori det tilsvarende skæreorgan 2,3 er drejeligt lejret, og af et mellemstykke 27, som forløber mellem huset 26 og huset 26 for et nærliggende modul 10.As explained earlier, the module 10 is constituted by a housing 26 in which the corresponding cutting member 2,3 is rotatably mounted and by an intermediate piece 27 extending between the housing 26 and the housing 26 for a neighboring module 10.

25 I fig. 4,5 og 6 ses, at mellemstykket 27 i det mindste over en del af sin længde er dannet af et rørformet profil 61, der omslutter transmissionsorganerne 14, som er anbragt i skærmen 9. Ved bagsiden er det rørformede pro- 30 fil 61 forsynet med to forstærkningsflige 62,63, hvoraf den ene 62 er forbundet med den øvre del af det rørforme- DK 173964 B1 16 de profil 61, og hvoraf den anden 63 er forbundet med den nedre del af det rørformede profil 61.In FIG. 4,5 and 6, it is seen that the intermediate piece 27 is formed, at least over a portion of its length, by a tubular profile 61 enclosing the transmission means 14 arranged in the screen 9. At the rear, the tubular profile 61 is provided. with two reinforcing tabs 62,63, one of which 62 is connected to the upper part of the tubular profile 61 and the other 63 is connected to the lower part of the tubular profile 61.

Den øvre forstærkningsflig 62 er større end den nedre 5 forstærkningsflig 63. Dette gør det muligt på sikker måde at integrere monteringstrækstængerne 28, der er anbragt ved bagsiden indenfor skærmen 9s rumfang, uden at bredden eller tykkelsen for skærmen 9 bliver for stor. Dette er meget væsentligt for opnåelse af en kvalitetsmæssig god 10 foderafskæring. Det fremgår således, at de bageste monteringstrækstænger 28,52,53,54, således som set ovenfra, forløber tilnærmelsesvis helt inde under de øvre forbindelsesflige 38,40 og under de øvre forstærkningsflige 62. Bredden af den øvre forstærkningsflig 62 er fordelagtigt 15 tilnærmelsesvis det dobbelte af bredden af den nedre forstærkningsflig 63. Endvidere forløber disse to forstærkningsflige 62,63 på tværs i forhold til arbejdsretningen 6 og tilnærmelsesvis vandret. Endvidere ses i fig. 2, 3, 4 og 5, at den øvre forstærkningsflig 62 i det mindste 20 delvis er en forlængelse af den bageste del af flangernes 29,30 øvre forbindelsesflige 38,40. Fig. 2 viser specifikt, at den øvre forstærkningsflig 62's bageste kant 64 er tilnærmelsesvis colineær med den bageste kant 65,66 af flangernes 29,30 øvre forbindelses flig 38, 40.The upper reinforcing tab 62 is larger than the lower reinforcing tab 63. This allows for securely integrating the mounting rods 28 located at the rear within the volume of the screen 9 without increasing the width or thickness of the screen 9. This is very important for achieving a good quality 10 feed cut. Thus, it can be seen that, as seen from above, the rear mounting drawbars 28,52,53,54 extend substantially all the way below the upper connecting tabs 38,40 and below the upper reinforcing tabs 62. The width of the upper reinforcing tab 62 is advantageously approximately twice these widths of the lower reinforcing tab 63. Furthermore, these two reinforcing tabs 62,63 extend transversely to the working direction 6 and approximately horizontally. Furthermore, in FIG. 2, 3, 4 and 5, that the upper reinforcing tab 62 is at least 20 in part an extension of the rear portion of the upper connecting tabs 38,40 of the flanges 29.30. FIG. 2 specifically shows that the rear edge 64 of the upper reinforcing tab 62 is approximately colinear with the trailing edge 65.66 of the upper connecting tabs 38, 40 of the flanges 29.30.

2525

Den nedre forstærkningsflig 63 er ligeledes i det mindste delvis (navnlig ved sine ender) tilvejebragt i forlængelse af den bageste del af flangernes 29,30 nedre forbindelsesflige 39,41. Den nedre forstærkningsflig 63 omfat-30 ter i sin midterdel 67 en tilbagetrækning 68 i retning mod den øvre forstærkningsflig 62. Mellemrummet mellem den nedre forstærkningsflig 63 og jorden, hvorpå skærmen DK 173964 B1 17 9 glider under arbejdet, er således meget stor, for at den jord, som glider langs undersiden 69 af mellemstykket 27's forreste kant 70, let kan passere under den nedre forstærkningsflig 63. Således undgås tilstopninger.The lower reinforcing tab 63 is also provided at least partially (especially at its ends) in extension of the rear portion of the lower connecting tabs 39, 41 of the flanges 29.30. The lower reinforcing tab 63 comprises in its center portion 67 a retraction 68 in the direction of the upper reinforcing tab 62. Thus, the space between the lower reinforcing tab 63 and the ground on which the screen DK 173964 B1 17 9 slides during operation is very large so that the soil sliding along the underside 69 of the front edge 70 of the intermediate piece 27 can easily pass below the lower reinforcing tab 63. Thus, clogging is avoided.

55

For at forøge modulet 10?s styrke fremgår det endvidere, at de to forstærkningsflige 62,63 er indbyrdes forbundet ved hjælp af ribber 71,72, som er rettet på tværs af skærmen 9's længdeakse 48. Således som det fremgår af 10 fig. 3, forløber ribberne 71,72 tilnærmelsesvis fra enderne af den nedre forstærkningsflig 63 skråt opefter konvergerende mod den øvre forstærkningsflig 62's midterdel 73. Forbindelsespunkter 74,75 mellem ribberne 71,72 og den øvre forstærkningsflig 62 er tilnærmelsesvis ar-15 rangeret ved den første tredjedel og ved den anden tredjedel af den øvre forstærkningsflig 62's længde. Det ses endvidere, at bredden af ribberne 71,72 er tilnærmelsesvis lig med bredden for den nedre forstærkningsflig 63, som er den med mindst bredde.Furthermore, to increase the strength of the module 10, it can be seen that the two reinforcing tabs 62,63 are interconnected by means of ribs 71.72, which are directed across the longitudinal axis 48 of the screen 9. 3, the ribs 71.72 extend approximately from the ends of the lower reinforcing tab 63 obliquely upwardly converging toward the middle portion 73 of the upper reinforcing tab 62. Connection points 74.75 between the ribs 71.72 and the upper reinforcing tab 62 are approximately arranged at the first third. and at the second third of the length of the upper reinforcing tab 62. It is further seen that the width of the ribs 71.72 is approximately equal to the width of the lower reinforcing tab 63 which is the least width.

2020

Med dette arrangement er modulet 10’s mellemstykke 27 meget stærkt, idet ribberne 71,72 danner en triangulation.With this arrangement, module 10's intermediate piece 27 is very strong, with ribs 71.72 forming a triangulation.

Det skal endvidere bemærkes, at tilvejebringelsen af ribberne 71,72 er relativ let ved støbning.Furthermore, it should be noted that the provision of the ribs 71.72 is relatively easy in casting.

25 Således som nævnt tidligere har stangskruerne 52 et rundt hoved 56, som er forsynet med en central sekskantet udsparing 60. Denne gør det muligt for skærmen 9 at bibeholde sin kompakthed uden at skade den lethed, hvormed 30 monteringen foretages. Det er således meget let at få adgang til stangskruen 52*s hoved 56 med et redskab, som for eksempel en pneumatisk skruetrækker.As mentioned earlier, the rod screws 52 have a round head 56 which is provided with a central hexagonal recess 60. This allows the screen 9 to maintain its compactness without damaging the ease with which the mounting is performed. Thus, it is very easy to access the head screw 52 * head 56 with a tool such as a pneumatic screwdriver.

Claims

A mower comprising rotary cutting means (2-5 m; 3 - 4) with at least one cutting tool (4), at least one of which rotating cutting means (2-4; 3-4) is driven by means of transmission (14). ) arranged in a screen (9) extending under these rotary cutting means (2-4; 3-4), said screen (9) comprising, among other things, 10 modules (10), each comprising a housing (26). ) in which a rotary cutting member (2-4; 3-4) is rotatably mounted, a spacer (27) extending between this housing (26) and a housing of a neighboring module (10) (26), and two flanges (29; 30), one of which (29) extends adjacent the housing (26) and the second (30) extends at the end of the spacer (27) which is farthest from the housing (26), which flanges (2) 9; 30) comprising at least one tab (31,32; 33,44) is intended to connect two adjacent modules (10) to each other by means of mounting pull rods (28) extending simultaneously through it. front part and rear part of the f first flange (29) on a module (10) and the second flange (30) on a neighboring module (10), each flanges (29; 30) each comprising a tab (31; 33) exhibiting a contact surface (57 ), on which the corresponding mounting tension rods (28) come into contact, and a tab (32; 34) which shows a contact surface (50; 51), the contact surface (50) of the first flange (29 of a module (10)) ) is intended to be in contact with the contact surface (51) of a second flange (30) of a neighboring module (10) extending 30 adjacent a vertical plane (36) comprising the axis of rotation (37) of the corresponding cutting member ( 2-4; 3-4) and perpendicular to the longitudinal axis (48) of the screen (9) opposite to the side where the corresponding intermediate piece (27) extends, characterized in that the contact surface DK 173964 B1 (57) of a module (10) the first flange (29) extends adjacent the vertical plane (36), where also the corresponding intermediate piece (27) extends, and the mounting drawbars (28) connecting this module (10) o g an adjacent module (10) with each other, provided only in a number of two, one of which extends through the front portion of the respective flanges (29; 30) tabs (31,32, -33, 34) and the other extending through the rear portion thereof. 10

Mower according to claim 1, characterized in that the first flange (29) of a module (10) is larger than its second flange (30).

Mower according to claim 1 or 2, characterized in that the tabs (31, 32, -33,34) of the two flanges (29; 30) of a module (10) front and rear are provided with a recess (42; 43) (44; 45), respectively, which recesses (42,44, -43, -45) serve as a passage for the mounting rods (28) and that the joint axis (46) of the front recesses (42) and the the joint axis (47) of the rear hole (44, -45) extends at least about the substantially horizontal median plane of the contact surface (50; 51) of each flange (29; 30). 25

Mower according to one or more of claims 1-3, characterized in that the screen (9), in a manner known per se, is provided at the front under each cutting means (2-4, -3-4) with a protective shoe (23), and that the front part of the first flange (29) of the first module (10) and the second flange (30) of the adjacent module (10) and the mounting pull rod (28) passing through the front part of these two flanges (29; 30), extend at least within the front portion (24) of the corresponding protective shoe (23).

Mower according to one or more of claims 1-4, 5, characterized in that the contact surface (57) of each flange (29; 30) is in shape with each corresponding mounting drawbar (28) as part of a cylindrical surface and that the corresponding mounting drawbar surface (28), which is intended to come into contact with this contact surface (57), also has a shape as part of a cylindrical surface of a size which is at least approximately identical to that of the contact surface ( 57) size.

Mower according to claim 5, characterized in that said abutment surface (57) of each flange (29; 30), in the form of a cylindrical surface, has a curvature directed against the contact surface (50; 51) of the flange (29; 30).

Mower according to one or more of claims 1-6, characterized in that each mounting drawbar (28) consists of a rod screw (52), two washers (53) and a nut (54).

Mower according to claim 7 combined with claim 5 or 6, characterized in that the surfaces of a mounting drawbar (28) intended to engage the corresponding contact surface (57) of the respective flanges (29; 30) are provided on the two spacers (53).

Mower according to claim 7 or 8, characterized in that a module (10) comprises at least one part (59) against which at least one side (58) of the corresponding nut (54) comes into contact, thus preventing rotation of this nut (54) by screwing and unscrewing the screw (52). 5

Mower according to claim 9, characterized in that the nut (54) has a square shape.

Mower according to one or more of claims 7-10, 10, characterized in that the head (56) of the rod screw (52) is round and provided with a central hexagonal recess (60).

Mower according to one or more of claims 1-11, 15, characterized in that the housing (26) and the intermediate piece (27) of a module (10), in a manner known per se, constitute a single part. 20