DK173916B1

DK173916B1 - chain Assembly

Info

Publication number: DK173916B1
Application number: DK199901532A
Authority: DK
Inventors: Jesper Harnaes; Stig Mathiesen
Original assignee: Vkr Holding As
Priority date: 1999-10-27
Filing date: 1999-10-27
Publication date: 2002-02-18
Also published as: DK199901532A

Description

i DK 173916 B1in DK 173916 B1

Opfindelsen angår en kæde samt en fremgangsmåde til at fremstille en kæde ved nitning, hvilken kæde består af indbyrdes forbundne kædeled, der hver omfatter et rygparti og to herfra i det væsentlige 5 vinkelret udragende parallelle vægpartier, hvori der er udformet korresponderende nittehuller i hver af to endedele af kædeleddet, hvor kædeleddene er forbundet med hinanden ved, at en endedel af et kædeled med et forholdsvis smalt rygparti er indskudt i en endedel af 10 et nabokædeled med et forholdsvis bredt rygparti, således at nittehullerne i de to endedeles parallelle vægpartier står ud for hinanden til optagelse af en nitte eller et akselstykke.BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a chain and to a method of manufacturing a rivet chain, said chain consisting of interconnected chain links, each comprising a back portion and two substantially perpendicular parallel wall portions thereof, in which corresponding rivet holes are formed in each of two rivets. end portions of the chain link, wherein the chain links are interconnected in that an end portion of a chain link having a relatively narrow back portion is inserted into an end portion of a neighboring chain link having a relatively wide back portion so that the rivet holes in the parallel end portions of the two end portions each other to receive a rivet or shaft piece.

Fra US 3.302.288 er det kendt at fremstille kæder 15 ved nitning, hvor enderne af nitten deformes, så nitten fikseres i aksialretningen.From US 3,302,288, it is known to produce chains 15 by riveting where the ends of the rivet are deformed so that the rivet is fixed in the axial direction.

Det er en ulempe ved denne kendte teknik, at der skal anvendes relativt lange nitter, der rager udenfor nævnte parallelle vægpartier i de brede kædeled, eller 20 hvor hovederne efterfølgende skal indpresses i vægpartierne, og der skal derfor anvendes relativt meget materiale til disse nitter. Samtidig er det i flere sammenhænge en ulempe, at ydersiden af en sådan kæde ikke er glat, eller at kædeleddene er væsentligt 25 bredere end nødvendigt.It is a disadvantage of this prior art that relatively long rivets projecting outside said parallel wall portions of the wide chain links or 20 where the heads are subsequently to be pressed into the wall portions are used, and therefore relatively much material is used for these rivets. At the same time, in several contexts, it is a disadvantage that the outside of such a chain is not smooth or that the chain links are substantially wider than necessary.

Fra DE Al 197 05 019 kendes en kæde med skiftevis brede og smalle kædeled, der er drejeligt forbundet med hængseltappe, som er indført i huller i kædeleddene. Hængseltappenes ender flugter med ydersiderne af de 30 brede kædeled og svejses fast til disse. I en alternativ udformning er der ikke huller i de brede kædeled, og hængseltappene svejses fast til indersiden af de brede kædeled.From DE Al 197 05 019 there is known a chain of alternately wide and narrow chain links, which are pivotally connected to hinge pins which are inserted into holes in the chain links. The ends of the hinge pins align with the outside of the 30 wide chain links and are welded to them. In an alternative embodiment, there are no holes in the wide chain links, and the hinge pins are welded to the inside of the wide chain links.

Fra DE 26 22 S02 B2 kendes ligeledes en kæde, hvor 35 hængseltappe svejses fast til sidedele.From DE 26 22 S02 B2 there is also known a chain in which 35 hinge pins are welded to side parts.

DK 173916 B1 2DK 173916 B1 2

Det er en ulempe ved denne kendte teknik, at der anvendes svejsning til at aksialfiksere hængseltappene, da det fremstillingsteknisk er vanskeligt og fordyrende .It is a disadvantage of this prior art that welding is used to axially fix the hinge pins as it is technically difficult and expensive.

5 Et formål med opfindelsen er at anvise en en kæde samt en fremgangsmåde til at fremstille kæder ved nitning, der ikke har ovennævnte ulemper.An object of the invention is to provide a chain as well as a method for making chains by riveting which does not have the above disadvantages.

Dette opnås med en kæde, der er ejendommelig ved, at nitten eller akselstykket har en sådan længde, at 10 aksialfiksering af nitten kan ske ved deformering af områder af nævnte parallelle vægpartier omkring nittehullerne fra ydersiden til formindskelse af nittehullernes lysning.This is achieved with a chain which is characterized in that the rivet or shaft length is such that axial fixation of the rivet can be effected by deforming areas of said parallel wall portions around the rivet holes from the outside to reduce the riveting holes.

Opfindelsen skal i det følgende beskrives nærmere 15 under henvisning til den skematiske tegning, hvor fig. 1 er en perspektivisk afbildning af et kædeled ifølge opfindelsen set skråt nedefra, fig. 2 et langsgående tværsnit af et kædeled under fremstilling, 20 fig. 3 afbildning af kædeled med ens led, og fig. 4 vægpartier med udboringer omkring nittehullerne .The invention will now be described in more detail with reference to the schematic drawing, in which fig. 1 is a perspective view of a chain link according to the invention viewed diagonally from below; FIG. 2 is a longitudinal cross-section of a chain link during manufacture; FIG. 3 is a view of a chain link with a similar link; and FIG. 4 wall sections with bores around the rivet holes.

På fig. 1 er vist et bredt kædeled 1 med parallelle vægpartier la og lb og et smalt kædeled 2 med 25 parallelle vægpartier 2a og 2b. Det smalle kædeled 2 er indført mellem det brede kædeled l's parallelle vægpartier la og lb.In FIG. 1 is shown a wide chain link 1 with parallel wall portions 1a and 1b and a narrow chain link 2 with 25 parallel wall portions 2a and 2b. The narrow chain link 2 is inserted between the parallel wall portions 1a and 1b of the wide chain link 1.

Fig. 2 viser hvordan der gennem flugtende nittehuller lc henholdsvis 2c i vægpartierne la-lb og 2a-2b 30 er indsat en nitte 3 med kortere længde end afstanden D mellem ydersiderne af det brede kædeled l's vægpartier la-lb. Efterfølgende deformeres det brede kædeled l's vægpartier la-lb fra ydersiden, så kantdele omkring nittehullerne lc nedtrykkes til formindskelse 35 af nittehullernes lysning og aksialfiksering af nitten DK 173916 B1 3 3. Deformationen kan foretages ved slagpåvirkning eller en anden almindelig form for deformeringsteknik, eksempelvis prægning, mod vægpartiet la af det brede kædeled med et prægehoved 4 med vægpartiet lb i anlæg 5 mod et modsvarende stationært prægehoved 5.FIG. 2 shows how through riveting rivet holes 1c and 2c, respectively, in the wall portions 1a-1b and 2a-2b 30, a rivet 3 of shorter length is inserted than the distance D between the outer sides of the wall portions 1a-1b of the wide chain link 1. Subsequently, the wall portions 1a-1b of the broad chain link 1 are deformed from the outside, so that edge portions around the rivet holes 1c are depressed to reduce the rivet holes' illumination and axial fixation of the rivet. , against the wall portion 1a of the wide chain link with an embossing head 4 with the wall portion 1b in abutment 5 against a corresponding stationary embossing head 5.

Deformationen kan hensigtsmæssigt udføres med et prægehoved, der er udformet med et antal spidse, bueformede segmenter bestående af to prægeflader. Prægehovedets første prægeflade ved den største radius 10 kan fordelagtigt være udformet som en flade, der under prægningen er i det væsentlige vinkelret på ydersiden af vægpartierne la-lb. Prægehovedets anden prægeflade kan fordelagtigt være udformet som en flade, der under prægningen danner en vinkel på f.eks. 45° med ydersiden 15 af vægpartierne la-lb.The deformation may conveniently be accomplished with an embossing head formed with a number of pointed, arcuate segments consisting of two embossing surfaces. The first embossing surface of the embossing head at the largest radius 10 may advantageously be formed as a surface which during embossing is substantially perpendicular to the outside of the wall portions 1a-1b. Advantageously, the second embossing surface of the embossing head may be formed as a surface which, during embossing, forms an angle of e.g. 45 ° with the outside 15 of the wall portions 1a-1b.

Kædeleddet vist i fig. 3 har en alternativ udformning, hvor kædeleddene har en smal og en bred ende, således at alle kædeled er ens.The chain link shown in FIG. 3 has an alternate configuration wherein the chain links have a narrow and a wide end so that all chain links are the same.

Fig. 4 viser et alternativ til en deformering af 20 randområderne, hvor der i vægpartiet i umiddelbar nærhed af nittehullerne er fordybninger eller gennemgående huller fx med form af et buestykke eller med cirkulær form, hvilke huller fx ved brug af en passende dorn kan anvendes til reducering af nittehullernes 25 lysning, og dermed bevirke en sammenklemning om nitten.FIG. 4 shows an alternative to a deformation of the 20 peripheral regions, where in the wall portion in the immediate vicinity of the rivet holes there are recesses or through holes, for example in the form of an arc or in circular shape, which holes can be used, for example, by reducing an appropriate mandrel. the riveting of the rivets 25, thereby causing a riveting about the rivets.

Nitten kan have en længde, så den kun lige kan nå fra det ene vægparti til det andet, eller den kan være så bred, at den når fra ydersiden af det ene vægparti til ydersiden af det andet vægparti.The rivet may be of a length so that it can reach just from one wall portion to the other, or it may be so wide as to reach from the outside of one wall portion to the outside of the other wall portion.

Claims

A chain with interconnected chain links (1, 2), each comprising a back portion and two substantially perpendicular parallel wall portions thereof, 5 wherein corresponding rivet holes are formed in each of two end portions of the chain link, the chain links (1,2). are connected to each other in that an end portion of a chain link having a relatively narrow (2) back portion is inserted into an end portion of a neighbor chain link having a relatively wide back portion (1) such that the rivet holes (1c, 2c) the parallel wall portions (1a-1b, 2a-2b) of the two end portions stand side-by-side to receive a rivet (3) or shaft, characterized in that the rivet or shaft has a length such that axial fixation of the rivet (3) can is effected by deforming areas of said parallel wall portions (1a-1b) around the rivet holes (1c) from the outside to reduce the riveting of the rivets.

A chain according to claim 1, characterized in that it is composed of alternating chain links, wherein every other chain link is formed with said narrow back portion and the intermediate links with said wide back portion.

A chain according to claim 1, characterized in that it is composed of uniform chain links, each having a first end portion with said narrow back portion and a second end portion with said wide back portion.

A method of manufacturing a chain according to claim 1, 2 or 3, wherein one end portion of a relatively narrow back portion chain link is inserted into one end portion of another relatively wide back portion chain link such that the rivet holes in parallel wall portions of the two end portions stand. side-by-side to receive a rivet or shaft, characterized by the use of rivets or shafts of such length that axial fixation of the rivet (3) can be effected by areas of said parallel wall portions. around the rivet holes (lc) by deformation from the outside is affected to reduce the riveting of the rivets.

Method according to claim 4, characterized in that the deformation is effected by impacting one of the parallel wall portions of the relatively wide back portion end portions with an embossed head (4) with the other wall portion (1b) brought into contact with a corresponding stationary embossing head. (5).