DK172657B1

DK172657B1 - Mechanism for instant stopping of the pull-in rollers on earth cutting machines

Info

Publication number: DK172657B1
Application number: DK16387A
Authority: DK
Inventors: Erwin Reber
Original assignee: Claas Saulgau Gmbh
Priority date: 1986-01-18
Filing date: 1987-01-14
Publication date: 1999-04-12
Also published as: DK16387A; DK16387D0

Description

-1 - DK 172657 B1-1 - DK 172657 B1

Opfindelsen angår en mekanisme til momentanstandsning af indtræksval -serne på marksnittemaskiner med mindst én øvre og mindst én nedre indtræksvalse og mindst én sikkerhedskobling i drevet til indtræksvalserne, hvor sikkerhedskoblingen er koblet foran en del af drivvalserne, og hvor sikker-s hedskoblingen er udført som en friktionskobling.BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a mechanism for instantaneous throttling of the pull-in rollers on field cut machines having at least one upper and at least one lower pull-in roller and at least one safety coupling in the drive to the pull-in rollers, the safety coupling being coupled in front of a portion of the drive rollers, and the safety coupling being performed as a friction clutch.

Ved marksnittemaskiner af den anførte art skal der løses den opgave at mindske de ved momentanstandsning forekommende kræfter ved, at der på spærretænderne og på spærreklinken forefindes skråflader, som virker på den måde, at de løsner friktionsfladerne i en sikkerhedskobling delvis, før sikker-10 hedskoblingen bringes helt til stilstand. Til en fuldstændig løsnelse anvendes her to eller flere spærreklinker.In the case of ground cutting machines of the kind mentioned, the task must be solved to reduce the forces present at the moment of shutdown by the fact that on the locking teeth and on the locking latch there are inclined surfaces which act in such a way that they release the friction surfaces partially in a safety coupling before the safety coupling brought to a complete standstill. For a complete solution, two or more locking latches are used here.

Da synkroniseringen af flere spærreklinker har vist sig vanskelig, foreslås der i det følgende en anden mekanisme til løsnelse og standsning af sikkerhedskoblingen.Since the synchronization of several barrier locks has proved difficult, another mechanism for loosening and stopping the safety clutch is proposed below.

is Ifølge opfindelsen foreslås det, at der på et koblingsnav drejeligt lejres en koblingsring, som på sin omkreds er forsynet med spærrekløer, som kan træde i vekselvirkning med en spærreklinke, og som på mindst én sideflade har skrå flader, som kan samvirke med tilsvarende skråflader på koblingsnavet og/eller friktionsskiven.In accordance with the invention, it is proposed that a coupling ring is rotatably mounted on a coupling hub, which in its circumference is provided with locking claws which can interact with a locking link and which have at least one side surface which can cooperate with corresponding inclined surfaces. on the coupling hub and / or friction disc.

ίο Ifølge en ejendommelighed ved opfindelsen skal spærreklinken på ende fladen være udstyret med en arbejdsflade, som kan samvirke med arbejdsfla-derne på spærrekløerne. Det er hensigtsmæssigt, hvis koblingsringen har flere spærrekløer, fortrinsvis fire til seks, fordi tidsforløbet til gennemførelse af momentanstandsningen derved formindskes tilsvarende, is I en udførelsesform skal koblingsringen på sidefladerne være udstyret med udsparinger, som mindst på én sideflade har en skråflade og mindst på én sideflade har omtrent vinkelret på bevægelsesretningen stående anslagsflader.According to a peculiarity of the invention, the locking latch at the end surface must be provided with a working surface which can cooperate with the working surfaces of the latches. It is convenient if the clutch ring has several locking claws, preferably four to six, because the time course for carrying out the torque condition is thereby reduced accordingly. In one embodiment, the clutch ring on the side surfaces must be provided with recesses having at least one side surface and at least one side face has abutment surfaces approximately perpendicular to the direction of movement.

Ved denne konstruktion skal koblingsnavet og/eller friktionsskiven være udstyret med fremspring, som samvirker med udsparingerne i sidefladerne, hen -» holdsvis anslagsflademe i koblingsringen.In this construction, the coupling hub and / or friction disc must be provided with projections which cooperate with the recesses in the lateral surfaces, respectively the abutment surfaces of the coupling ring.

Omvendt kan udsparingerne også befinde sig i sidefladerne på koblings navet, henholdsvis i friktionsskiven og fremspringene på koblingsringen.Conversely, the recesses may also be in the side surfaces of the coupling hub, respectively in the friction disk and the projections on the coupling ring.

For at friktionsfladerne i sikkerhedskoblingen under drift er spændt, foreslås det, at vinklen α på skråfladen er større end friktionsvinklen for det 3i materialepar, som er valgt til koblingsringen og koblingsnavet, henholdsvis friktionsskiven.In order for the friction surfaces of the safety clutch to be tensioned during operation, it is suggested that the angle α of the inclined surface is greater than the friction angle of the 3i pair of materials selected for the coupling ring and the coupling hub, respectively the friction disc.

-2 - DK 172657 B1-2 - DK 172657 B1

Ved en valgfri udformning kan en skrå flade vekselvirke med en rulle eller en kugle.In an optional design, an inclined surface may interact with a roller or a ball.

For bedst muligt at løsne friktionsfladerne ensartet skal der på sideflader -ne af koblingsringen anvendes mindst to, fortrinsvis fire til seks skråflader, 5 henholdsvis anslagsflader.In order to best loosen the friction surfaces uniformly, at least two, preferably four to six inclined surfaces, 5 and abutment surfaces, respectively, must be used on the side surfaces of the coupling ring.

I fig. 1-4 vises eksempler på momentanstop-mekanismen ifølge opfindelsen. Her viser: fig. 1 en momentanstop-mekanisme med en sikkerhedskobling io skematisk i snit, fig. 2 en delvis gengivelse i retningen af pilen A (fig. 1), fig. 3 en anden udformning af genstanden, i øvrigt svarende til fig. 2, og fig. 4 en delvis gengivelse i retning af pilen B (fig. 2).In FIG. 1-4 are examples of the instantaneous stop mechanism according to the invention. Here: FIG. 1 is a schematic sectional view of a momentary stop mechanism with a safety clutch 10; FIG. 2 is a partial view in the direction of arrow A (FIG. 1); FIG. 3 shows another embodiment of the article, otherwise similar to FIG. 2, and FIG. Figure 4 is a partial view of the arrow B (Figure 2).

1515

En momentanstop-mekanisme består i det væsentlige af en sikkerhedskobling i drevet til indtræksvalserne, hvor sikkerhedskoblingen er koblet for · an en del af drivvalserne, og hvor sikkerhedskoblingen er udført som en frik -tionskobling.An instantaneous stop mechanism consists essentially of a safety clutch in the drive to the pull-in rollers, where the safety clutch is coupled to a portion of the drive rollers and the safety clutch is designed as a friction clutch.

a> Et koblingsnav 34 har på sin omkreds en rotationsflade 45. Denne rotati onsflade 45 begrænses på den ene side ved hjælp af en ringformet ribbe 46.a> A coupling hub 34 has in its circumference a rotating surface 45. This rotation surface 45 is constrained on one side by means of an annular rib 46.

Denne ribbe har fremspring 47, som på den ene side går over i en skråflade 48.This rib has projections 47, which on one side pass into an inclined surface 48.

Til koblingsnavet 34 er der rotationsstift forbundet en friktionsskive 39, som på den mod ribben 46 vendende side har fremspring 49, som har anslagsflader 50. jj Mellem ribben 46 og friktionsskiven 39 er der lejret en koblingsring 51 dreje ligt på koblingsnavet 34. Den har på den mod ribben 46 vendende sideflade 52 udsparinger 53, som på en side har en skråflade 54. På den mod friktionsskiven 39 vendende sideflade 55 er der anbragt udsparinger 56, som har anslagsflader 57. På sin omkreds har koblingsringen 51 et antal spærrekløer 58. jo Koblingsnavet 34 og friktionsskiven 39 er ved hjælp af fjedrene 44 spændt mod hinanden. Afstanden mellem dem er imidlertid så stor, at koblingsringen 51 kan dreje sig mellem dem. Rotationen er herunder indskrænket ved, at fremspringene 47 rækker ind i udsparingerne 53 og fremspringene 49 ind i udsparingerne 56.To the coupling hub 34, a rotating pin is connected a friction disk 39 which has on the side facing the rib 46 a projection 49 which has abutment faces 50. Between the rib 46 and the friction disc 39, a coupling ring 51 is pivotally located on the coupling hub 34. the side surface 52 facing the rib 46 facing recesses 53, which on one side has an inclined surface 54. On the side face 55 facing the friction disc 39, recesses 56 are provided, which have abutment surfaces 57. On its circumference, the coupling ring 51 has a number of locking claws 58. The coupling hub 34 and the friction disk 39 are tensioned against each other by means of the springs 44. However, the distance between them is so large that the coupling ring 51 can rotate between them. The rotation is hereby limited in that the projections 47 extend into the recesses 53 and the projections 49 into the recesses 56.

as På fig. 3 vises en lidt ændret konstruktion. Her er der mellem skråfladerne på fremspringene 47 og skråfladerne 54 på udsparingerne 53 en kugle 59 eller en mile for at formindske friktionen mellem de to skråflader.as In FIG. 3 shows a slightly altered construction. Here, between the inclined surfaces of the projections 47 and the inclined surfaces 54 of the recesses 53, there is a ball 59 or a mile to reduce friction between the two inclined surfaces.

DK 172657 B1 -3 -DK 172657 B1 -3 -

En spærreklinke 27 er lejret drejeligt på en aksel 28. Den kan fx. bevæges med en løftemagnet 29. Spærreklinken 27 kan standse koblingsringen 51 i dens rotation ved, at den lægger sig mod virkeflademe 60 på spærrekløeme 58.A latch 27 is pivotally mounted on a shaft 28. It can e.g. The locking clamp 27 can stop the clutch ring 51 in its rotation by lying against the working surfaces 60 of the locking claws 58.

Under normal drift af marksnittemaskinen drives koblingsnavet 34 og s friktionsskiverne 39. Med disse drejer koblingsringen 51 sig. Hvis indtræksval serne i marksnittemaskinen hurtigt skal bringes til standsning, bevæges spær -reklinken 27 nedad ved hjælp af løftemagneten 29. Nar en spærretand 58 rammer spærreklinken 27, hindres først den videre rotation af koblingsringen 51. Koblingsnavet 34 og friktionsskiven 39 drejer videre med en lille vinkel. Der - ίο ved forskydes skråfladerne 48 på ribben 46 og skråfladen 54 på koblingsringen 51 således indbyrdes, at afstanden mellem ribben 46 og friktionsskiven 39 forøges. Derved løsnes sikkerhedskoblingen så meget, at den ikke mere kan over · føre et nævneværdigt drejningsmoment. Umiddelbart derefter rammer anslags-flademe 50 og 57 hinanden, hvorved rotationen fuldstændig ophører, i; Sikkerhedskoblingen frigives atter ved udsvingning af spærreklinken 27.During normal operation of the field cutter, the clutch hub 34 and the friction washers 39 are driven. With this, the clutch ring 51 rotates. If the pull-in choices in the field cutter are to be quickly stopped, the locking clamp 27 is moved downward by the lifting magnet 29. When a locking tooth 58 strikes the locking clutch 27, the further rotation of the clutch ring 51. The clutch hub 34 and the friction disk 39 first rotate with a small angle. Thereby, at the slanting surfaces 48 of the rib 46 and the slanting surface 54 of the coupling ring 51 are displaced so that the distance between the rib 46 and the friction disk 39 is increased. This loosens the safety clutch so much that it can no longer transmit any significant torque. Immediately thereafter, the abutment surfaces 50 and 57 strike each other, whereby the rotation completely ceases; The safety clutch is released again by oscillation of the latch 27.

Under virkning fra fjedrene 44 drejes skråfladerne 48 og 54 således indbyrdes, at de atter indtager deres udgangsposition, som er vist på fig. 2. For at lette dette forløb er udformningen ifølge fig. 3 særlig fordelagtig.Under the action of the springs 44, the inclined faces 48 and 54 are rotated so that they again take their starting position, as shown in FIG. 2. To facilitate this process, the embodiment of FIG. 3 particularly advantageous.

44

Claims

1. A mechanism for instantaneous tightening of the pull-in rollers on ground-cut machines having at least έη upper and at least one lower push-in roller and at least one s safety coupling in the drive to the pull-in rollers, where a safety coupling is connected in front of part of the drive rollers and the safety coupling is made as a friction coupling, in that a coupling ring (51) is rotatably mounted on the coupling hub (34), which at its circumference is provided with locking claws (58) which can interact with a locking link (27), and io as on at least one side surface ( 52) has inclined surfaces (54) which can cooperate with corresponding inclined surfaces (48) on the coupling hub (34) and / or the friction disk (39).

A field cutter mechanism according to claim 1, characterized in that the locking latch (27) on the end surface is equipped with a working surface which can cooperate with the working surfaces (60) on the locking claws (58).

Mechanism for field cutting machines according to claims 1-2, characterized in that the coupling ring (51) has several locking claws (58), preferably four to six.

Mechanism for field cutting machines according to claims I - 3, characterized in that the coupling ring (51) on the side surfaces (52, 55) is provided with recesses (53) which have at least one side surface (52) having an inclined surface (54). η

Mechanism for field cutting machines according to claim 4, characterized in that recesses (56), at least on one side surface (55), have abutment faces (57) perpendicular to the direction of movement.

Mechanism for field cutting machines according to claims 4 and 5, characterized in that the coupling hub (34) and / or the friction disc (39) are provided with projecting ice (47, 49) which cooperates with the recesses (53, 56) in the side surfaces (52). , 55), respectively, the abutment surfaces (57) of the coupling ring (51).

Mechanism for field cutting machines according to claims 4-6, characterized in that the angle (a) of the inclined surface (54) is greater than the friction angle of the pair of materials selected for the coupling ring (51) and the coupling hub (34), respectively µ of the friction disk ( 39).

A field cutter mechanism according to any one of claims 1 to 7, characterized in that the recesses are in the side surfaces of the coupling hub (34), respectively in the friction washer (39) and the projections on the coupling ring (51).

A field cutter mechanism according to any one of claims 1 to 8, characterized in that the inclined surface (48 or 54) interacts with a roller (59) or a ball (59). -5 - DK 172657 B1

A field cutter mechanism according to any one of claims 1 to 9, characterized in that at least two, preferably four to six inclined surfaces (54) and abutment surfaces (57) are used on the side surfaces (52, 55) of the coupling ring (51).