EP1888942A1 - Roller chain - Google Patents

Roller chain

Info

Publication number
EP1888942A1
EP1888942A1 EP06753909A EP06753909A EP1888942A1 EP 1888942 A1 EP1888942 A1 EP 1888942A1 EP 06753909 A EP06753909 A EP 06753909A EP 06753909 A EP06753909 A EP 06753909A EP 1888942 A1 EP1888942 A1 EP 1888942A1
Authority
EP
European Patent Office
Prior art keywords
austenitic
nitriding
roller chain
bolts
chain
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06753909A
Other languages
German (de)
French (fr)
Inventor
Detlef Ragnitz
Christophe Cenac
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renold PLC
Original Assignee
Renold PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renold PLC filed Critical Renold PLC
Publication of EP1888942A1 publication Critical patent/EP1888942A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G13/00—Chains
    • F16G13/02—Driving-chains
    • F16G13/06—Driving-chains with links connected by parallel driving-pins with or without rollers so called open links

Definitions

  • the invention relates to a roller chain with bolts, bushes, rollers, inner plates and outer plates according to the preamble of claim 1.
  • a high corrosion resistance of the chain parts is desired. This is given for chromium alloyed austenitic steels. However, this material does not have sufficient hardness to obtain the desired wear resistance. If the surface of the austenitic steel is hardened by one of the known nitriding methods, such as gas nitriding, plasma nitriding or pulsed plasma nitriding, a chromium nitride-containing edge layer forms, which has the desired hardness and thus wear resistance, but whose corrosion resistance has been considerably reduced.
  • a roller chain with bolts, bushes, rollers, inner plates and outer plates in which two sockets are connected by at least two inner plates together and thereby form a chain link, wherein on each socket a bushing comprehensive Roll is rotatably mounted and wherein each two consecutive chain links is hinged together, that each bushing is seated on a projecting beyond the two ends of the bush bolt and two covered by two consecutive chain links bolts are connected at least by two outer plates, to create, in particular, bolts a surface not only of high hardness and therefore high wear resistance, but also of high corrosion resistance.
  • the peripheral layer of the bolts does not contain the chromium nitride which reduces surface corrosion resistance.
  • chromium nitride takes place when the nitriding is carried out at a temperature above 500 0 C.
  • the conventional nitriding process work into diesel sem range of temperatures because at lower temperatures the diffusion of nitrogen in the auste- nitician steel is extremely slow, so that the formation of chromium nitride exclusive process temperature of less than 400 0 C for economic reasons is unacceptable.
  • an economically feasible way is the implantation of nitrogen, which can be carried out at temperatures below 400 0 C and with sufficient speed.
  • This nitriding process can increase the surface hardness, for example, from 400 to 500 HV to approximately 900 to 1000 HV, while the corrosion resistance of the austenitic steel is practically unimpaired.
  • the inner and outer plates and the bushings can be made of austenitic stainless steel and their surface layer is formed by an S phase of the austenitic steel obtained by nitriding.
  • This provides high wear resistance as well as high corrosion resistance for all parts of the chain.
  • the nitrided tab surface additionally increases the fatigue strength of the chain.
  • the bushes are preferably made of sintered material containing oil-filled pores. This ensures reliable and permanent lubrication of the roller chain.
  • the roller chain shown in the figure consists of bolts 1, bushes 2, rollers 3, inner plates 4 and outer plates 5.
  • two bushes 2 are connected to one another by two inner plates 4 fixedly connected to these bushes 2 and form with these two inner plates 4 Chain link, wherein on each bushing 2 a sleeve 2 comprehensive role 3 is rotatably mounted GE.
  • two consecutive chain links of this type are thereby hinged together connected so that each bushing 2 is seated on a protruding at both ends of this sleeve 2 bolts 1 and two so covered by two consecutive chain links bolt 1 are connected by two outer lublaschen 5, wherein two ends of each bolt, each having an outer flap 5 are connected.
  • the bolts 1 are made of austenitic stainless steel, and their surface layer is formed by an S phase of the austenitic steel obtained by nitriding.
  • This preferably also applies to the sockets 2, which, however, can alternatively also be designed with another hard coating, for example conventionally formed nitrides or DLC, a diamond-like carbon.
  • DLC conventionally formed nitrides or DLC, a diamond-like carbon.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Chain Conveyers (AREA)

Abstract

In a roller chain with pins (1), bushes (2), rollers (3), inner plates (4) and outer plates (5), every two bushes are connected to one another by at least two inner plates whereby forming a chain link. A roller is rotationally mounted on each bush whereby surrounding it. Every two successive chain links are connected to one another in an articulated manner so that each bush sits on a pin projecting from both ends of the bush, and two pins comprised by two successive chain links are connected at least by two outer plates. The pins are made of an austenitic stainless steel and their surface layer is formed by an S-phase of the austenitic steel, said S-phase being obtained by nitriding.

Description

Rollenkette roller chain
Die Erfindung betrifft eine Rollenkette mit Bolzen, Buchsen, Rollen, Innenlaschen und Außenlaschen nach dem Oberbegriff des Anspruchs 1.The invention relates to a roller chain with bolts, bushes, rollers, inner plates and outer plates according to the preamble of claim 1.
Derartige, häufig für Antriebe genutzte Ketten, sind dort, wo Oberflächen gleitend aufeinander gelagert sind, also insbesondere auf Innenseiten der Buchsen und daran anliegenden äußeren Oberflächen der Bolzen, hohem Verschleiß .ausgesetzt. Um den Verschleiß in Grenzen zu halten, ist an den genannten Stellen üblicherweise eine gute Schmierung vorgesehen. Eine unzureichende Schmierung führt jedoch normalerweise zu einer raschen Beschädigung oder Zerstörung der Kette und darüber hinaus zu drastischen Energieverlusten.Such, frequently used for drives chains, where surfaces are slidably mounted on each other, so in particular on the inner sides of the sockets and adjacent outer surfaces of the bolts, high wear .ausgesetzt. In order to limit the wear, a good lubrication is usually provided at the locations mentioned. However, inadequate lubrication usually results in rapid damage or destruction of the chain and, in addition, drastic energy losses.
Um die Anfälligkeit gattungsgemäßer Ketten für Beschädigungen auch bei ungenügender Schmierung zu ver- ringern, ist es nach dem Stand der Technik bekannt, die Bolzen und/oder die Buchsen mit Nitriden zu beschichten. Auch diese bekannten Ketten haben jedoch den Nachteil, dass der bei einem Trockenlauf der Ket- te mangels ausreichender Schmierung zumindest an einer von jeweils zwei aufeinander gleitenden Oberflächen auftretende Verschleiß über ein angestrebt kleines Maß hinausgeht.In order to prevent the susceptibility of generic chains to damage even in the case of insufficient lubrication According to the state of the art, it is known to coat the bolts and / or the bushings with nitrides. However, these known chains also have the disadvantage that, in the event of dry running of the chain, in the absence of sufficient lubrication, wear occurring beyond a desired small amount occurs at least on one of two surfaces sliding on each other.
Darüber hinaus wird eine hohe Korrosionsbeständigkeit der Kettenteile angestrebt. Diese ist bei mit Chrom legierten austenitischen Stählen gegeben. Jedoch weist dieses Material keine ausreichende Härte auf, um die gewünschte Verschleißfestigkeit zu erhalten. Wird die Oberfläche des austenischen Stahls durch eines der bekannten Nitrierverfahren wie Gasnitrieren, Plasmanitrieren oder Impulsplasmanitrieren gehärtet, dann bildet sich eine Chromnitrid enthaltende Randschicht, die zwar die gewünschte Härte und damit Ver- schleißfestigkeit besitzt, deren Korrosionsbeständigkeit jedoch beträchtlich verringert wurde.In addition, a high corrosion resistance of the chain parts is desired. This is given for chromium alloyed austenitic steels. However, this material does not have sufficient hardness to obtain the desired wear resistance. If the surface of the austenitic steel is hardened by one of the known nitriding methods, such as gas nitriding, plasma nitriding or pulsed plasma nitriding, a chromium nitride-containing edge layer forms, which has the desired hardness and thus wear resistance, but whose corrosion resistance has been considerably reduced.
Es ist daher die Aufgabe der vorliegenden Erfindung, eine Rollenkette mit Bolzen, Buchsen, Rollen, Innen- laschen und Außenlaschen, bei der jeweils zwei Buchsen durch mindestens zwei Innenlaschen miteinander verbunden sind und dadurch ein Kettenglied bilden, wobei auf jeder Buchse eine die Buchse umfassende Rolle drehbar gelagert ist und wobei jeweils zwei aufeinander folge Kettenglieder dadurch gelenkig miteinander verbunden ist, dass jede Buchse auf einem an den beiden Enden der Buchse über diese hinausragenden Bolzen sitzt und zwei so von zwei aufeinander folgenden Kettengliedern umfasste Bolzen zumindest durch zwei Außenlaschen verbunden sind, zu schaffen, bei der insbesondere die Bolzen eine Oberfläche nicht nur von großer Härte und damit hoher Verschleißfestigkeit, sondern auch von hoher Korrosionsbeständigkeit haben.It is therefore the object of the present invention, a roller chain with bolts, bushes, rollers, inner plates and outer plates, in which two sockets are connected by at least two inner plates together and thereby form a chain link, wherein on each socket a bushing comprehensive Roll is rotatably mounted and wherein each two consecutive chain links is hinged together, that each bushing is seated on a projecting beyond the two ends of the bush bolt and two covered by two consecutive chain links bolts are connected at least by two outer plates, to create, in particular, bolts a surface not only of high hardness and therefore high wear resistance, but also of high corrosion resistance.
Diese Aufgabe wird erfindungsgemäß durch eine Rollenkette mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen der erfindungsgemäßen Rollenkette ergeben sich aus den Unteransprüchen.This object is achieved by a roller chain with the features of claim 1. Advantageous developments of the roller chain according to the invention will become apparent from the dependent claims.
Dadurch, dass die Bolzen aus austenitischem rostfreiem Stahl und ihre Oberflächenschicht durch eine durch Nitrieren erhaltene S-Phase des austenitischen Stahls gebildet ist, enthält die Randschicht der Bolzen kein die Korrosionsbeständigkeit der Oberfläche herabset- zendes Chromnitrid. Die S-Phase des austenitischenBy forming the austenitic stainless steel bolts and their surface layer by an austenitic steel S-phase obtained by nitriding, the peripheral layer of the bolts does not contain the chromium nitride which reduces surface corrosion resistance. The S phase of austenitic
Stahls, die auch als "Expanded Austenite" bezeichnet wird, stellt eine feste Lösung von Stickstoff im austenitischen Stahl dar. Das ursprüngliche Austenit- gitter ist durch die Einbringung des Stickstoffs auf- geweitet.Steel, also known as expanded austenite, is a solid solution of nitrogen in austenitic steel. The original austenitic lattice is widened by the introduction of nitrogen.
Die Bildung von Chromnitrid findet statt, wenn das Nitrieren bei einer Temperatur oberhalb 5000C erfolgt. Die üblichen Nitrierverfahren arbeiten in die- sem Temperaturbereich, da bei niedrigeren Temperaturen das Eindiffundieren von Stickstoff in dem auste- nitische Stahl extrem langsam ist, so dass eine die Bildung von Chromnitrid ausschließende Verfahrenstemperatur von weniger als 4000C aus wirtschaftlichen Gründen nicht vertretbar ist. Ein in wirtschaftlicher Hinsicht gangbarer Weg ist jedoch die Implantation von Stickstoff, die bei Temperaturen unterhalb 4000C und mit ausreichender Geschwindigkeit durchgeführt werden kann. Durch diesen Nitriervorgang kann die Oberflächenhärte beispielsweise von 400 - 500 HV auf etwa 900 - 1000 HV angehoben werden, währen die Korrosionsbeständigkeit des austenitischen Stahls praktisch nicht beein- trächtigt wird.The formation of chromium nitride takes place when the nitriding is carried out at a temperature above 500 0 C. The conventional nitriding process work into diesel sem range of temperatures because at lower temperatures the diffusion of nitrogen in the auste- nitische steel is extremely slow, so that the formation of chromium nitride exclusive process temperature of less than 400 0 C for economic reasons is unacceptable. However, an economically feasible way is the implantation of nitrogen, which can be carried out at temperatures below 400 0 C and with sufficient speed. This nitriding process can increase the surface hardness, for example, from 400 to 500 HV to approximately 900 to 1000 HV, while the corrosion resistance of the austenitic steel is practically unimpaired.
Gemäß vorteilhaften Weiterbildungen der erfindungsgemäßen Rollenkette können auch die Innen- und Außenlaschen sowie die Buchsen aus austenitischem rostfreiem Stahl bestehen und ihre Oberflächenschicht durch eine durch Nitrieren erhaltene S-Phase des austenitischen Stahls gebildet ist. Dadurch werden eine hohe Verschleißfestigkeit als auch eine hohe Korrosionsbeständigkeit für alle Teile der Kette erhalten. Die nitrierte Laschenoberfläche erhöht zusätzlich die Dauerfestigkeit der Kette.According to advantageous developments of the roller chain according to the invention, the inner and outer plates and the bushings can be made of austenitic stainless steel and their surface layer is formed by an S phase of the austenitic steel obtained by nitriding. This provides high wear resistance as well as high corrosion resistance for all parts of the chain. The nitrided tab surface additionally increases the fatigue strength of the chain.
Darüber hinaus bestehen die Buchsen vorzugsweise aus Sintermaterial, das ölgefüllte Poren enthält. Damit ist eine zuverlässige und dauerhafte Schmierung der Rollenkette sichergestellt.In addition, the bushes are preferably made of sintered material containing oil-filled pores. This ensures reliable and permanent lubrication of the roller chain.
Ein Ausführungsbeispiel der Erfindung wird im Folgenden anhand der Figur erläutert, die eine teilweise als Querschnittszeichnung ausgeführte Draufsicht auf eine entsprechende Rollenkette zeigt.An embodiment of the invention will be explained below with reference to the figure, which shows a partially executed as a cross-sectional drawing plan view of a corresponding roller chain.
Die in der Figur abgebildete Rollenkette besteht aus Bolzen 1, Buchsen 2, Rollen 3, Innenlaschen 4 und Au- ßenlaschen 5. Jeweils zwei Buchsen 2 sind durch zwei mit diesen Buchsen 2 fest verbundene Innenlaschen 4 miteinander verbunden und bilden mit diesen beiden Innenlaschen 4 ein Kettenglied, wobei auf jeder Buchse 2 eine die Buchse 2 umfassende Rolle 3 drehbar ge- lagert ist. Jeweils zwei aufeinander folgende Kettenglieder dieser Art sind dadurch gelenkig miteinander verbunden, dass jede Buchse 2 auf einem an den beiden Enden dieser Buchse 2 über diese hinausragenden Bolzen 1 sitzt und zwei so von zwei aufeinander folgenden Kettengliedern umfasste Bolzen 1 durch zwei Au- ßenlaschen 5 verbunden sind, wobei zwei Enden jedes Bolzens mit jeweils einer Außenlasche 5 verbunden sind. Erfindungsgemäß bestehen die Bolzen 1 aus austenitischem rostfreiem Stahl, wobei ihre Oberflächenschicht durch eine durch Nitrieren erhaltene S- Phase des austenitischen Stahls gebildet ist. Dies gilt vorzugsweise auch für die Buchsen 2, die alternativ jedoch auch mit einer anderen Hartbeschichtung, beispielsweise aus in herkömmlicher Weise gebildeten Nitriden oder DLC, einem diamantähnlichen Kohlen- stoff, ausgeführt sein können. Das Gleiche gilt für die Rollen 3 sowie die Innen- und Außenlaschen 4, 5. The roller chain shown in the figure consists of bolts 1, bushes 2, rollers 3, inner plates 4 and outer plates 5. In each case two bushes 2 are connected to one another by two inner plates 4 fixedly connected to these bushes 2 and form with these two inner plates 4 Chain link, wherein on each bushing 2 a sleeve 2 comprehensive role 3 is rotatably mounted GE. In each case two consecutive chain links of this type are thereby hinged together connected so that each bushing 2 is seated on a protruding at both ends of this sleeve 2 bolts 1 and two so covered by two consecutive chain links bolt 1 are connected by two outer ßenlaschen 5, wherein two ends of each bolt, each having an outer flap 5 are connected. According to the invention, the bolts 1 are made of austenitic stainless steel, and their surface layer is formed by an S phase of the austenitic steel obtained by nitriding. This preferably also applies to the sockets 2, which, however, can alternatively also be designed with another hard coating, for example conventionally formed nitrides or DLC, a diamond-like carbon. The same applies to the rollers 3 and the inner and outer plates 4, 5.

Claims

Patentansprüche claims
1. Rollenkette mit Bolzen (1), Buchsen (2), Rollen (3), Innenlaschen (4) und Außenlaschen (5), bei der jeweils zwei Buchsen (2) durch mindestens zwei Innenlaschen (4) miteinander verbunden sind und dadurch ein Kettenglied bilden, wobei auf jeder Buchse (2) eine die Buchse (2) umfassende Rolle (3) drehbar gelagert ist und wobei jeweils zwei aufeinander folgende Kettenglieder dadurch gelenkig miteinander verbunden sind, dass jede Buchse (2) auf einem an den beiden Enden der1. roller chain with bolts (1), bushes (2), rollers (3), inner plates (4) and outer plates (5), in which two bushings (2) by at least two inner plates (4) are interconnected and thereby a Form chain link, wherein on each bushing (2) a bush (2) comprising a roller (3) is rotatably mounted and wherein each two consecutive chain links are hinged together, that each socket (2) on one at the two ends of
Buchse (2) über diese hinausragenden Bolzen (1) sitzt und zwei so von zwei aufeinander folgenden Kettengliedern umfasste Bolzen (1) zumindest durch zwei Außenlaschen (5) verbunden sind, d a d u r c h g e k e n n z e i c h n e t , dass die Bolzen (1) aus austenitischem rostfreiem Stahl bestehen und ihre Oberflächenschicht durch eine durch Nitrieren erhaltene S-Phase des austenitischen Stahls gebildet ist.Socket (2) sits over this protruding bolt (1) and two bolts (1) thus covered by two successive chain links are connected by at least two outer straps (5), characterized in that the bolts (1) consist of austenitic stainless steel and their Surface layer is formed by an S-phase of the austenitic steel obtained by nitriding.
2. Rollenkette nach Anspruch 1, dadurch gekennzeichnet, dass die Buchsen (2) aus Sintermaterial bestehen, das ölgefüllte Poren enthält.2. Roller chain according to claim 1, characterized in that the bushes (2) consist of sintered material containing oil-filled pores.
3. Rollenkette nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Innen- und/oder Außenla- sehen (4, 5) aus austenitischem rostfreiem Stahl bestehen und ihre Oberflächenschicht durch eine durch Nitrieren erhaltene S-Phase des austeni- schen Stahls gebildet ist. Rollenkette nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Buchsen (2) aus austenitischem rostfreien Stahl bestehen und ihre Oberflächenschicht durch eine durch Nitrieren erhaltene S-Phase des austenitischen Stahls gebildet ist. 3. A roller chain according to claim 1 or 2, characterized in that the inner and / or outer sheets (4, 5) are made of austenitic stainless steel and their surface layer is formed by an S phase of the austenitic steel obtained by nitriding , A roller chain according to any one of claims 1 to 3, characterized in that the bushings (2) are made of austenitic stainless steel and their surface layer is formed by an austenitic steel S-phase obtained by nitriding.
EP06753909A 2005-05-31 2006-05-23 Roller chain Withdrawn EP1888942A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200520008582 DE202005008582U1 (en) 2005-05-31 2005-05-31 Roller chain, e.g. drive chain etc. has pins, sleeves, rollers, and inner and outer plates all of austenitic stainless steel and surface coating formed by nitrifying process
PCT/EP2006/005052 WO2006128645A1 (en) 2005-05-31 2006-05-23 Roller chain

Publications (1)

Publication Number Publication Date
EP1888942A1 true EP1888942A1 (en) 2008-02-20

Family

ID=34814031

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06753909A Withdrawn EP1888942A1 (en) 2005-05-31 2006-05-23 Roller chain

Country Status (4)

Country Link
US (1) US20080307767A1 (en)
EP (1) EP1888942A1 (en)
DE (1) DE202005008582U1 (en)
WO (1) WO2006128645A1 (en)

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DE202008017737U1 (en) * 2008-07-22 2010-09-23 Doceram Gmbh Chain
DE202010005148U1 (en) * 2010-04-13 2010-07-01 Renold Gmbh roller chain
DE202014105286U1 (en) 2014-11-04 2016-02-08 Renold Gmbh roller chain
US20160280293A1 (en) * 2015-03-24 2016-09-29 Caterpillar Inc. Break-In Coating on Track Assembly Components
DE102016215709A1 (en) * 2015-08-28 2017-03-02 Tsubakimoto Chain Co. Chain component and chain
DE102016223941A1 (en) * 2016-12-01 2018-06-07 Bayerische Motoren Werke Aktiengesellschaft articulated chain
EP3791088A4 (en) * 2018-05-07 2022-01-26 U.S. Tsubaki Holdings, Inc. Stainless steel roller chain with increased durability
CN114718989A (en) * 2020-12-22 2022-07-08 株式会社椿本链条 Chain

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Also Published As

Publication number Publication date
WO2006128645A1 (en) 2006-12-07
US20080307767A1 (en) 2008-12-18
DE202005008582U1 (en) 2005-07-28

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