DK171092B1

DK171092B1 - Conditioning roller for mowing machine and pair of such conditioning rollers

Info

Publication number: DK171092B1
Application number: DK203691A
Authority: DK
Inventors: Joern Freudendahl; Harald Raun Nielsen
Original assignee: Freudendahl J Fab As
Priority date: 1991-12-19
Filing date: 1991-12-19
Publication date: 1996-06-03
Also published as: DK203691D0; DK203691A

Description

i DK 171092 B1in DK 171092 B1

Opfindelsen angår en konditioneringsvalse til en slåmaskine omfattende et centralt cylindrisk legeme og kraftige ribber af elastisk eftergiveligt materiale, der strække sig hen over overfladen af det cylindriske 5 legeme i en retning med en væsentlig komposant parallel med det cylindriske legemes akse, og indrettet til samvirke med en anden konditioneringsvalse med tilsvarende kraftige ribber, hvorved konditionerings-valserne indgriber tandhjulsagtigt med hinanden.BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a mower conditioning roller comprising a central cylindrical body and strong ribs of resilient resilient material extending over the surface of the cylindrical body in a direction substantially parallel to the axis of the cylindrical body, and adapted to cooperate with another conditioning roller having correspondingly strong ribs, whereby the conditioning rollers engage gears with one another.

10 Opfindelsen angår endvidere et par af sådanne konditio-neringsvalser omfattende et drev til synkron drift af de to konditioneringsvalser.The invention further relates to a pair of such conditioning rollers comprising a drive for synchronous operation of the two conditioning rollers.

Med betegnelsen "kraftig" menes her i denne forbindelse, at ribberne ved normalt konditionerings-15 arbejde forekommer i det væsentlige stive.By this term "strong" is meant in this connection that the ribs appear to be substantially stiff during normal conditioning work.

Sådanne konditioneringsvalser kendes fra i handelen værende slåmaskiner samt fra DK-B-159863 og anvendes til at knække stråene af en slået afgrøde såsom græs for derved at bryde stråenes overflade, hvorved stråene 20 tørrer hurtigere. Den fra DK-B-159863 kendte konditioneringsvalse omfatter således et centralt cylindrisk legeme i form af et centralrør med kraftige ribber i form af lave profillister, som ved hjælp af selvskærende skruer er skruet fast på centralrøret. I slåmaskiner 25 anvendes par af sådanne konditioneringsvalser til som nævnt at konditionere slået afgrøde. Derfor er de to konditioneringsvalser anbragt således, at de er i tandhjulsagtigt indgreb med hinanden dog uden at ribberne berører hinanden, hvorfor der kræves en synkron 30 styring af de to konditioneringsvalser. For at tillade at fremmedlegemer såsom sten eller klumper af afgrøde kan passere mellem valserne, er det ved sådanne kendte konditioneringsvalsepar nødvendigt at ophænge i det mindste den ene valse bevægeligt, således at den kan 3 5 bevæge sig bort fra den anden valse for at tillade DK 171092 B1 2 fremmedlegemer at passere. Derfor kræves et relativt kompliceret synkrondrev.Such conditioning rollers are known from commercial mowers as well as from DK-B-159863 and are used to break the straws of a mowed crop such as grass, thereby breaking the surface of the straws, whereby the straws 20 dry faster. Thus, the conditioning roller known from DK-B-159863 comprises a central cylindrical body in the form of a central tube with strong ribs in the form of low profile moldings, which are screwed onto the central tube by means of self-tapping screws. In mowers 25, pairs of such conditioning rollers are used to condition struck crop as mentioned. Therefore, the two conditioning rollers are arranged such that they are in gear-like engagement with each other, however, without the ribs touching each other, therefore a synchronous control of the two conditioning rollers is required. In order to allow foreign bodies such as stones or lumps of crop to pass between the rollers, it is necessary for such known conditioning roll pairs to hang at least one roller movable so that it can move away from the other roller to allow DK 171092 B1 2 foreign bodies to pass. Therefore, a relatively complicated synchronous drive is required.

I visse tilfælde eksempelvis i liftophængte slåmaskiner, er det ønskeligt at holde slåmaskinens 5 egenvægt så lavt som mulig, hvorfor det også for konditioneringsvalseparrets vedkommende er ønskeligt at spare vægt.In some cases, for example, in lift-mounted mowers, it is desirable to keep the mower's own weight as low as possible, which is why it is desirable to save weight for the conditioning roller pair as well.

Formålet med opfindelsen er at tilvejebringe en konditioneringsvalse og et konditioneringsvalsepar, hvis 10 vægt er mindst mulig.The object of the invention is to provide a conditioning roller and a conditioning roller pair, the minimum weight of which is 10.

Dette opnås ved hjælp af dels en konditioneringsvalse, som er særegen ved, at ribberne har et tværsnit, hvori højden fra det cylindriske legeme er større end bredden, dels et par af konditioneringsvalser, som er 15 særegent ved, at konditioneringsvalsernes akseafstand under drift er forudbestemt og konstant.This is achieved by means of a conditioning roller which is peculiar in that the ribs have a cross-section in which the height of the cylindrical body is greater than the width, and in part a pair of conditioning rollers, which is peculiar in that the axis distance of the conditioning rollers during operation is predetermined. and constant.

Med opfindelsen opnås, at det centrale cylindriske legeme for en konditioneringsvalse med en given yderdiameter målt fra toppen af ribberne, kan være væsentlig 20 mindre end for en konventionel konditioneringsvalse. Dette medfører en vægtbesparelse. Endvidere kan det komplicerede synkrondrev og den bevægelige ophængning af i det mindste den ene konditioneringsvalse undværes, fordi de relativ høje og elastiske ribber vil kunne 25 deformeres i tilstrækkelig grad til at give plads for passage af fremmedlegemer. Dette betyder en yderligere vægtbespareIse.The invention provides that the central cylindrical body of a conditioning roller having a given outer diameter measured from the top of the ribs may be substantially smaller than that of a conventional conditioning roller. This results in a weight saving. Furthermore, the complicated synchronous drive and the movable suspension of at least one conditioning roller can be avoided because the relatively high and elastic ribs can be deformed sufficiently to allow for passage of foreign bodies. This means an additional weight saving.

Ifølge en foretrukket udførelsesform for en konditioneringsvalse ifølge opfindelsen omfatter 30 ribberne på deres ene sideflade mindst én langsgående trinformation. Herved opnås en forbedret konditio-neringsvirkning.According to a preferred embodiment of a conditioning roller according to the invention, the ribs on their one side surface comprise at least one longitudinal wooden information. This results in an improved conditioning effect.

Ifølge en yderligere foretrukket udførelsesform for en konditioneringsvalse, er ribberne samlet to og to i 35 i det væsentlige U-formede profiler, hvor U'ets bund DK 171092 Bl 3 fastholdes mod det cylindriske legeme. Herved opnås mulighed for en bekvem fastgøring af ribberne på det cylindriske legeme.According to a further preferred embodiment of a conditioning roller, the ribs are assembled two and two in substantially U-shaped profiles, where the bottom of the U is held against the cylindrical body. This allows for convenient attachment of the ribs to the cylindrical body.

Ifølge en foretrukket udførelsesform for et par af 5 konditioneringsvalser omfatter drevet en friktionskobling. Herved opnås, at ekstremt store fremmedlegemer, som forsøger at passere konditioneringsvalseparret, kan bremse konditioneringsvalsernes bevægelse, uden at nogen dele derved overbelastes og lider skade.According to a preferred embodiment of a pair of 5 conditioning rollers, the drive comprises a friction clutch. Hereby it is obtained that extremely large foreign bodies which try to pass the conditioning roller pair can slow down the movement of the conditioning rollers without any parts being overloaded and suffering damage.

10 Opfindelsen vil i det følgende blive forklaret nærmere ved hjælp af et udførelseseksempel under henvisning til tegningen, på hvilken fig. 1 viser et tværsnit gennem et konditionerings-valsepar ifølge kendt teknik, 15 fig. 2 et tværsnit gennem et konditionerings- valsepar ifølge opfindelsen, og fig. 3 et tværsnit gennem konditioneringsvalsepar-ret ifølge opfindelsen under passage af en sten.BRIEF DESCRIPTION OF THE DRAWINGS The invention will be explained in more detail by way of example with reference to the drawing, in which: FIG. 1 is a cross-sectional view of a prior art conditioning roller pair; FIG. 2 is a cross-section through a conditioning roller pair according to the invention; and FIG. 3 is a cross-section through the conditioning roller pair of the invention while passing a rock.

I fig. 1 er vist et par kendte konditionerings-20 valser, der hver især omfatter et rør 1, hvorpå er fastskruet langsgående ribber 2, som er fastgjort ved hjælp af selvskærende skruer 3. Valserne er ophængt således, at de kan bevæge sig fra hinanden i tilfælde af, at en større genstand såsom en sten eller en stor 25 klump græs skal passere, da sådan passage ellers ville kunne ødelægge valserne eller deres ophæng.In FIG. 1, there are shown a pair of known conditioning rolls, each comprising a tube 1, on which are secured longitudinal ribs 2, which are secured by self-tapping screws 3. The rollers are suspended so that they can move apart in case of a larger object such as a stone or large 25 lumps of grass must pass, as such passage would otherwise destroy the rollers or their suspension.

I fig. 2 er i tværsnit vist et konditionerings-valsepar ifølge opfindelsen. Dette par består ligeledes af rør 11, på hvilke er monteret langsgående ribber 12, 30 som to og to er forbundet ved hjælp af et tvær- eller bundstykke 15, som er fastgjort til røret 11 ved hjælp af selvskærende skruer 13. Ribberne 12 er fremstillet af et elastisk eftergiveligt materiale såsom gummi med en hårdhed på ca. 85 Shore, og de har en tilstrækkelig 35 højde i forhold til deres bredde til at kunne udbøjes DK 171092 Bl 4 eller komprimeres i tilfælde af passage af eksempelvis en sten, således som det er vist i fig. 3.In FIG. 2 is a cross-section of a conditioning roller pair according to the invention. This pair also consists of tubes 11, on which are mounted longitudinal ribs 12, 30, which are connected two and two by means of a transverse or bottom piece 15, which is fixed to the tube 11 by means of self-tapping screws 13. The ribs 12 are made of a resilient resilient material such as rubber having a hardness of approx. 85 shore, and they have a sufficient height in relation to their width to be able to be deflected or compressed in the case of passage of, for example, a rock, as shown in FIG. Third

Som det ses ved sammenligning af det kendte konditioneringsvalsepar i fig. 1, og det nye konditio-5 neringsvalsepar ifølge opfindelsen vist i fig. 2, er røret 11 væsentlig mindre end røret 1 for en given yderdiameter. Herved spares vægt, og endvidere er de selvskærende skruer 13 i forhold til de selvskærende skruer 3 flyttet til et mindre belastet område, hvorfor 10 røret 11 kan have mindre godstykkelse end røret 1. Dette giver yderligere en materiale- og vægtbesparelse.Endvidere har konditioneringsvalseparret ifølge opfindelsen ikke behov for at være ophængt således, at valserne kan bevæge sig fra hinanden, fordi ribberne 12 kan bøje ud 15 og give plads for passage af eksempelvis en sten. Af hensyn til ekstreme tilfælde, vil drevet til konditioneringsvalseparret ifølge opfindelsen være forsynet med en overlastsikring, eksempelvis i form af en friktionskobling (ikke vist).As seen by comparing the known conditioning roller pair of FIG. 1, and the new conditioning roll pair according to the invention shown in FIG. 2, the pipe 11 is substantially smaller than the pipe 1 for a given outer diameter. Hereby, weight is saved, and furthermore, the self-tapping screws 13 relative to the self-tapping screws 3 are moved to a less loaded area, which is why the tube 11 may have less thickness than the tube 1. This further provides a material and weight saving. the invention does not need to be suspended so that the rollers can move apart because the ribs 12 can bend out 15 and allow space for passage of, for example, a rock. For extreme cases, the drive to the conditioning roller pair according to the invention will be provided with an overload protection, for example in the form of a friction clutch (not shown).

20 I det viste udførelseseksempel er højden af ribberne 12 over overfladen af det centrale rør 11 ca.In the illustrated embodiment, the height of the ribs 12 above the surface of the central tube 11 is approx.

65 mm, og akseafstanden for valserne er således, at mindste afstand mellem det ene af rørene 11 og en bolt 13 på det andet af rørene er ca. 80 mm. Dette bevirker, 25 at sten eller lignende med tværmål på op til ca. 7,5 cm kan passere mellem konditioneringsvalserne.65 mm, and the axis distance of the rollers is such that the minimum distance between one of the pipes 11 and a bolt 13 on the other of the pipes is approx. 80 mm. This causes rocks or similar with cross dimensions of up to approx. 7.5 cm can pass between the conditioning rollers.

Ved deres ene sideflade har ribberne 12 i det viste udførelseseksempel et trin 16. Ved valseparrets rotation bringes hvert trin 16 tæt ind i nærheden af topfladen 30 af en ribbe 12 på den modsatte valse, medens trinnet på denne ribbe 12 bringes tæt ind i nærheden af topfladen af ribben med det første trin. Herved dannes mellem hver to ribber på de to valser siksakformede mellemrum, i hvilke det stråmateriale, som konditioneres, trans-At their one side surface, the ribs 12 in the illustrated embodiment have a step 16. At the rotation of the roller pair, each step 16 is brought close to the top surface 30 of a rib 12 on the opposite roller, while the step of this rib 12 is brought close to the top surface of the rib with the first step. Thereby, zig-shaped spacers are formed between each two ribs on the two rollers in which the straw material which is conditioned transfers.

Claims

A mower conditioning roller comprising a central cylindrical body (11) and strong ribs (12) of resilient resilient material extending over the surface of the cylindrical body (11) in a direction with a substantial component parallel to the cylindrical body. axis, and adapted to cooperate 10 with another conditioning roller having correspondingly strong ribs, whereby the conditioning rollers engage gear-like with one another, characterized in that the ribs (12) have a cross-section where the height from the cylindrical body is greater than the width.

Conditioning roller according to claim 1, characterized in that the ribs (12) on their one side surface comprise at least one longitudinal wooden information (16).

Conditioning roller according to claim 1 or 2, characterized in that the ribs (12) are assembled 2. two and two in substantially U-shaped profiles, where the bottom (15) of the U is held against the cylindrical body (11).

A pair of conditioning rollers according to claim 1, 2 or 3 comprising a drive for synchronous operation of the two conditioning rolls, characterized in that the operating distance of the conditioning rollers is predetermined and constant.

A pair of conditioning rollers according to claim 4, characterized in that the drive comprises a friction clutch.