EP0293399B1 - Guiding rail and link chain for chain saws - Google Patents

Guiding rail and link chain for chain saws Download PDF

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Publication number
EP0293399B1
EP0293399B1 EP87906654A EP87906654A EP0293399B1 EP 0293399 B1 EP0293399 B1 EP 0293399B1 EP 87906654 A EP87906654 A EP 87906654A EP 87906654 A EP87906654 A EP 87906654A EP 0293399 B1 EP0293399 B1 EP 0293399B1
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EP
European Patent Office
Prior art keywords
chain
slide
guide rail
elements
link 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.)
Expired - Lifetime
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EP87906654A
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German (de)
French (fr)
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EP0293399A1 (en
Inventor
Willi Boller
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Gamma Stawag AG
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Gamma Stawag AG
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Priority to AT87906654T priority Critical patent/ATE65956T1/en
Publication of EP0293399A1 publication Critical patent/EP0293399A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/08—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with saw-blades of endless cutter-type, e.g. chain saws, i.e. saw chains, strap saws
    • B28D1/082—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with saw-blades of endless cutter-type, e.g. chain saws, i.e. saw chains, strap saws consisting of chain saws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/02—Chain saws equipped with guide bar
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/12—Lubricating devices specially designed for chain saws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B33/00—Sawing tools for saw mills, sawing machines, or sawing devices
    • B27B33/14—Saw chains
    • B27B33/147—Saw chains with incorporated lubricating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/12—Saw-blades or saw-discs specially adapted for working stone
    • B28D1/124—Saw chains; rod-like saw blades; saw cables

Definitions

  • the invention relates to a guide rail and link chain system for chainsaws for processing concrete, stone and masonry with a link chain, coolant channels guided through the guide rail, additional rails arranged on both longitudinal sides of the guide rail and with chain links which have at least partially lateral guide elements and cutting plates placed on the chain links .
  • Such a link chain for a chainsaw is known from publication D-A-3332051.
  • the guide rail, also known as the sword, of a chainsaw is provided with additional rails made of metal on the long sides.
  • the guide rail is hollow, this cavity serving as a coolant channel, and coolant channels are arranged on the side surfaces of the additional rails.
  • the associated link chain consists of rollers mounted on pins, which are connected to one another via guide and connecting links. The rollers run on the outer surface of the additional rail, and the chain is deflected via a chain wheel at the front end of the sword. Diamond-tipped inserts, which serve as cutting tools, are attached to the chain guide elements.
  • the link chain between the links is equipped with rollers which roll on the additional rails or guide rails and transmit the chain forces to them. It is assumed that the use of roller bearings or the principle of rolling friction is absolutely necessary to enable the sawing of rocks. This consideration is fundamentally correct. In practice, however, it can be seen that very high surface pressures occur in the area of the contact points of the rollers, which lead to damage and destruction of the additional rails or guide rails. The cutting dust deposited on the rolling surface further strengthens and accelerates this destruction process.
  • the guide rail / link chain system according to the invention has a significantly longer service life than the known chain saws. This is achieved in that the guide rail or the sword of the chainsaw has additional rails made of plastic on the two long sides, on which metallic sliding elements of the chain slide. These additional rails are inserted in grooves, which are located on the long sides of the sword. Materials with high abrasion and water resistance are suitable as plastics. Since the coolant channels are routed through the center area of the additional rails, the coolant and lubricant emerges in the middle area of the sliding surfaces. As a result, the cutting and grinding dust are washed away from the areas of the sliding surfaces, and a liquid film forms between the sliding rails and the sliding elements of the chain, which prevents the metallic chain links from being ground on the additional rails.
  • the joints in the chain are completely shielded from the outside, and grinding and cutting dust cannot penetrate them. This is ensured on the one hand by the fact that the sliding surfaces of the joints are covered on all sides and on the other hand that lubricant is pressed outwards from the center of the joint in a consistent form over all sliding surfaces.
  • Suitable lubricants are water-resistant greases with additives, e.g. Molybdenum and other known additives.
  • the pressure of the coolant ensures that only small amounts of lubricant emerge from the sliding surfaces between the guide elements and the sliding elements. This means that there is little loss of lubricant and the joints can be relubricated as part of normal work breaks.
  • this guide rail / link chain system achieves a service life that is several times longer than that of known link chains for concrete, stone and masonry. Since the components of the chain consist of flat elements that are not bent or bent, they can easily be ground to exact dimensions, which means that a cost-effective chain can be built. Since the inserts are attached to carrier plates, there is no danger that the hardened chain links will be softened by soldering. In addition, the cutting plates with their carrier plates can be attached to the chain links at the most convenient time for production, which in turn enables the chain to be manufactured more easily and more cheaply.
  • the section shown in Figure 1 from a guide rail 1, or a sword of a chainsaw shows the front side wall 18, the intermediate piece 16, to which the side walls are attached and are held at the correct distance from each other, and the one lying on the intermediate piece 16 upper additional rail 3.
  • this additional rail 3 consists of bakelite, ie a laminate, and is smoothly inserted into the space between the side walls 18, 19 of the guide rail 1.
  • the sliding elements 6 of the link chain 2 rest on the sliding surface 15 of the additional rail 3.
  • the sliding elements 6 are connected to one another via joints 5 by means of the side guide elements 7, 8.
  • cutting plates 4 are fastened, which are formed from diamond-tipped hard metal plates.
  • Figure 2 shows the configuration of the link chain 2 and the edge region of the guide rail 1 in an enlarged view.
  • the section shown goes through one of the joints 5 and a coolant channel 13 in the slide rail 3.
  • the joint 5 consists of a bolt 21 which has pins 23, 24 offset on both sides. These pins 23, 24 have a smaller diameter than the inner region of the pin 21.
  • This pin 21 is rotatably mounted in a bearing bush 20, which is pressed into the sliding element 6 in a seated manner.
  • the pins 23 and 24 are in turn mounted in bores in the side guide elements 7 and 8, wherein they are firmly connected to these side guide elements 7 and 8 in a known manner.
  • this is done by notching the outer surfaces of the pins 23 and 24 in a ring-shaped manner and thereby displacing material to the outside, and clamping the bolt 21 with the side guide elements 7 and 8.
  • the Dimensions between the two side guide elements 7 and 8 and the width of the bearing bush 20 and the sliding elements 6 are chosen so that the sliding elements 6 and the side guide elements 7, 8 are free of play and easily pivotable about the axes 22 against each other.
  • the side guide elements 7 and 8 are further designed such that they overlap the side surfaces 11, 12 of the additional rail 3, and thereby the link chain 2 is laterally guided on the additional rail 3 with as little play as possible.
  • the sliding elements 6 have sliding surfaces 9 on the lower side which rest on the sliding surface 15 of the additional rail 3.
  • Coolant channels 17 lead through the intermediate pieces 16 in the guide rail 1 from the inner cavity of the guide rail 1 to the outside.
  • Two coolant channels 13 each extend from these coolant channels 17 and are arranged in the center of the additional rail 3.
  • the outlet openings of these coolant channels 13 are located in the region of the central axis 14 on the sliding surface 15 of the additional rail 3. The coolant supplied via the guide rail 1 thus flows outward through the coolant channels 17 and 13 and flows outward via the sliding surface 15.
  • a lubricant channel 25 is located in the center of the joints 5. This lubricant channel 25 is closed on one side by a pin 30 and has a ball valve 32 loaded with a spring 31 on the other side. One or more radial bores 26 extend from the central lubricant channel 25 and form lubricant channels and enable the lubricant to be supplied to the outer jacket 27 of the bolt 21.
  • the ball valve 32 prevents the ingress of water, but allows water-resistant molybdenum grease to be pressed into the lubricant channels 25 and 26. The grease is pressed outward along the outer jacket 27 of the bolt 21 and also fills the sliding surfaces between the sliding elements 6 and the side guide elements 7 and 8 off.
  • the guide rail / link chain system therefore has a self-cleaning effect and continuously ensures optimal lubrication and a sliding film between all sliding surfaces. Since the pins 23, 24 of the bolt 21 are positively connected to the side guide elements 7 and 8, the outer casing 27 or the sliding surface of the bolt 21 is encapsulated to the outside and protected against contamination.
  • the cutting plates 4 are fastened on carrier plates 28.
  • the cutting plates 4 are normally attached to the carrier plates 28 by brazing processes.
  • the carrier plates 28 cover the full base of the cutting plates 4, which results in the greatest possible adhesion and contact area between the cutting plates 4 and the carrier plates 28.
  • Corresponding recesses are provided on the sliding elements 6 on the upper side 10, cams 29 engaging over the projecting edges of the carrier plates 28.
  • the carrier plates 28 are fastened in the recesses, or on the cams 29 of the sliding elements 6, by gluing or riveting the cams 29. This fastening method ensures simple and secure fastening and prevents the hardened sliding elements 6 from being softened again when the inserts 4 are fastened by soldering methods.
  • the pin 21 and the bearing bush 20 have a hardness of 55 to 65 Rockwell C or HRC and the sliding elements 6 and the side guide elements 7 and 8 a hardness of 35 to 48 Rockwell C or HRC. All known cutting and cooling agents for stone work can be used as coolants.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Mining & Mineral Resources (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Electroluminescent Light Sources (AREA)
  • Framework For Endless Conveyors (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Sawing (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)

Abstract

PCT No. PCT/CH87/00144 Sec. 371 Date Aug. 23, 1988 Sec. 102(e) Date Aug. 23, 1988 PCT Filed Oct. 20, 1987 PCT Pub. No. WO88/04602 PCT Pub. Date Jun. 30, 1988.On two opposite long narrow sides of a guide rail (1) of a chain saw for stone are arranged slide rails (3) of plastic. The slide rails (3) are located between the side walls (18, 19) of the guide rail. A link chain (2) consists of slide elements (6) and pairs of side guide members (7, 8) which are joined with each other through links (5). The slide elements (6) lie, on one side, on a surface (15) of the slide rail (3) and have, on the opposite side, cutting plates (4). In the slide rail (3) are arranged central coolant channels (13) which are connected with the coolant feed present in the core of the guide rail (1). The side guiding of the chain (2) is assured through the side guide members (7, 8) lying against the side surfaces (11, 12) of the slide rail (3).

Description

Die Erfindung betrifft ein Führungsschienen- und Gliederkettensystem für Kettensägen zur Bearbeitung von Beton, Gesteinen und Mauerwerk mit einer Gliederkette, durch die Führungsschiene geführten Kühlmittelkanälen, an beiden Längsseiten der Führungsschiene angeordneten Zusatzschienen sowie mit Kettengliedern welche mindestens teilweise seitliche Führungselemente und auf die Kettenglieder aufgesetzte Schneidplatten aufweisen.The invention relates to a guide rail and link chain system for chainsaws for processing concrete, stone and masonry with a link chain, coolant channels guided through the guide rail, additional rails arranged on both longitudinal sides of the guide rail and with chain links which have at least partially lateral guide elements and cutting plates placed on the chain links .

Eine derartige Gliederkette für eine Kettensäge ist aus der Publikation D-A-3332051 bekannt. Dabei ist die Führungsschiene, oder auch Schwert genannt, einer Kettensäge an den Längsseiten mit Zusatzschienen aus Metall versehen. Die Führungsschiene ist hohl ausgebildet, wobei dieser Hohlraum als Kühlmittelkanal dient, und an den Seitenflächen der Zusatzschienen sind Kühlmittelkanäle angeordnet. Die zugehörige Gliederkette besteht aus auf Zapfen gelagerten Rollen, welche über Führungs- und Verbindungsglieder miteinander verbunden sind. Die Rollen laufen auf der Aussenfläche der Zusatzschiene, und die Kette wird am vorderen Ende des Schwertes über ein Kettenrad umgelenkt. Auf den Führungselementen der Kette sind diamantbestückte Schneidplatten befestigt, welche als Schneidwerkzeuge dienen.Such a link chain for a chainsaw is known from publication D-A-3332051. The guide rail, also known as the sword, of a chainsaw is provided with additional rails made of metal on the long sides. The guide rail is hollow, this cavity serving as a coolant channel, and coolant channels are arranged on the side surfaces of the additional rails. The associated link chain consists of rollers mounted on pins, which are connected to one another via guide and connecting links. The rollers run on the outer surface of the additional rail, and the chain is deflected via a chain wheel at the front end of the sword. Diamond-tipped inserts, which serve as cutting tools, are attached to the chain guide elements.

Trotzdem der Kette über die Führungsschiene laufend Kühlund Schmiermittel zugeführt werden kann, weisen derartige Führungsschienen-/Gliederkettensysteme eine hohe Abnützung und kurze Standzeit auf. Der Abrieb der Schneidplatten und der Schneidstaub setzen sich an den Zusatzschienen, den Führungsgliedern und den Rollen ab und schleifen diese metallischen Bauteile ab bis zur Zerstörung. Zudem dringt der Schleifstaub zwischen alle Gleitflächen ein, und das zulässige Spiel zwischen den Elementen wird durch Abnützung sehr rasch überschritten. Da derartige Ketten sehr teuer sind, können sie aufgrund der raschen Abnützung nicht wirtschaftlich eingesetzt werden. Die häufig notwendigen Kettenwechsel und Betriebsunterbrüche verursachen zudem hohe Betriebskosten.Despite the fact that coolant and lubricant can be fed continuously to the chain via the guide rail, such guide rail / link chain systems have a high degree of wear and a short service life. The abrasion of the inserts and the cutting dust settle on the additional rails, the guide members and the rollers and grind these metallic components down until they are destroyed. Also penetrates the grinding dust between all sliding surfaces, and the permissible play between the elements is very quickly exceeded by wear. Since such chains are very expensive, they cannot be used economically due to the rapid wear. The frequently necessary chain changes and business interruptions also cause high operating costs.

Eine weitere ähnliche Schneidkette für Steinarbeiten ist aus DE A 2245730 bekannt. Bei dieser Lösung wird eine Gliederkette beschrieben, bei welcher jedes zweite Glied einstückig und U-förmig ausgebildet ist und die Schenkel der Glieder eine, an den Längsseiten des Schwertes angeordnete, Führungsleiste umgreifen. Alle Kettenglieder müssen mit einer Diamant-Schneidplatte bestückt sein. Auf den Verbindungsachsen zwischen den Kettengliedern sind Rollen gelagert, welche auf den Führungsleisten des Schwertes abrollen. Die beschriebene Schneidkette ist weder mit einer Kühlung noch einer Schmierung ausgestattet, was zu erheblichem Verschleiss und rascher Beschädigung führt.Another similar cutting chain for stone work is known from DE A 2245730. In this solution, a link chain is described in which every second link is formed in one piece and in a U-shape and the limbs of the links encompass a guide bar arranged on the long sides of the sword. All chain links must be equipped with a diamond cutting plate. Rollers are mounted on the connecting axes between the chain links, which roll on the guide bars of the sword. The cutting chain described is neither equipped with cooling nor lubrication, which leads to considerable wear and rapid damage.

Bei beiden bekannten Lösungen ist die Gliederkette zwischen den Gliedern mit Rollen bestückt, welche auf den Zusatzschienen, bzw. Führungsleisten abrollen und die Kettenkräfte auf diese übertragen. Es wird davon ausgegangen, dass die Verwendung von Rollenlagern, bzw. das Prinzip der Rollreibung zwingend notwendig ist, um das Sägen von Gesteinen zu ermöglichen. Diese Ueberlegung ist grundsätzlich richtig. In der Praxis zeigt sich jedoch, dass im Bereiche der Kontaktpunkte der Rollen sehr hohe Flächenpressungen auftreten, welche zu Beschädigungen und Zerstörung der Zusatzschienen, bzw. Führungsleisten, führen. Der sich auf der Rollfläche ablagernde Schneidstaub, verstärkt und beschleunigt diesen Zerstörungsprozess zusätzlich.In both known solutions, the link chain between the links is equipped with rollers which roll on the additional rails or guide rails and transmit the chain forces to them. It is assumed that the use of roller bearings or the principle of rolling friction is absolutely necessary to enable the sawing of rocks. This consideration is fundamentally correct. In practice, however, it can be seen that very high surface pressures occur in the area of the contact points of the rollers, which lead to damage and destruction of the additional rails or guide rails. The cutting dust deposited on the rolling surface further strengthens and accelerates this destruction process.

Es ist Aufgabe der vorliegenden Erfindung, ein Führungsschienen-/Gliederkettensystem zu schaffen, welches eine hohe Standzeit aufweist, bei welchem die Abnützung zwischen den Kettengliedern und den Führungselementen gering ist, welches eine hohe Sicherheit gegen Störungen aufweist und einfach in der Herstellung ist.It is an object of the present invention to provide a guide rail / link chain system which has a long service life, in which the wear between the chain links and the guide elements is low, which has high security against malfunctions and is simple to manufacture.

Diese Aufgabe wird durch die im kennzeichnenden Teil des Patentanspruches 1 definierten Merkmale gelöst. Vorteilhafte Weiterbildungen der Erfindung ergeben sich nach den Merkmalen der abhängigen Patentansprüche.This object is achieved by the features defined in the characterizing part of patent claim 1. Advantageous developments of the invention result from the features of the dependent claims.

Das erfindungsgemässe Führungsschienen-/Gliederkettensystem weist gegenüber den bekannten Kettensägen eine wesentlich höhere Standzeit auf. Dies wird dadurch erreicht, dass die Führungsschiene bzw. das Schwert der Kettensäge an den beiden Längsseiten Zusatzschienen aus Kunststoff aufweist, auf welchen metallische Gleitelemente der Kette gleiten. Diese Zusatzschienen sind in Nuten, welche sich an den Längsseiten des Schwertes befinden, eingelegt. Als Kunststoffe eignen sich Materialien mit hoher Abrieb- und Wasserbeständigkeit. Da die Kühlmittelkanäle durch den Zentrumsbereich der Zusatzschienen geführt sind, tritt die Kühl- und Schmierflüssigkeit im Mittelbereich der Gleitflächen aus. Dadurch werden der Schneid- und Schleifstaub aus dem Bereiche der Gleitflächen weggespült, und zwischen den Gleitschienen und den Gleitelementen der Kette bildet sich ein Flüssigkeitsfilm, welcher das Schleifen der metallischen Kettenglieder auf den Zusatzschienen verhindert.The guide rail / link chain system according to the invention has a significantly longer service life than the known chain saws. This is achieved in that the guide rail or the sword of the chainsaw has additional rails made of plastic on the two long sides, on which metallic sliding elements of the chain slide. These additional rails are inserted in grooves, which are located on the long sides of the sword. Materials with high abrasion and water resistance are suitable as plastics. Since the coolant channels are routed through the center area of the additional rails, the coolant and lubricant emerges in the middle area of the sliding surfaces. As a result, the cutting and grinding dust are washed away from the areas of the sliding surfaces, and a liquid film forms between the sliding rails and the sliding elements of the chain, which prevents the metallic chain links from being ground on the additional rails.

Die Gelenke in der Kette sind vollständig gegen aussen abgeschirmt, und Schleif- und Schneidstaub kann nicht in diese eindringen. Dies wird einerseits dadurch sichergestellt, dass die gleitenden Flächen der Gelenke allseitig abgedeckt sind und anderseits vom Zentrum des Gelenkes Schmierstoff in konsistenter Form über alle Gleitflächen nach aussen gepresst wird. Als Schmierstoffe eignen sich wasserbeständige Fette mit Additiven, wie z.B. Molybdän und anderen bekannten Zusätzen. Im Kontaktbereiche der Gleitflächen zwischen den Gleitelementen und den Gleitschienen sorgt der Druck des Kühlmittels dafür, dass nur geringe Mengen von Schmiermittel aus den Gleitflächen zwischen den Führungselementen und den Gleitelementen austreten. Dadurch ist der Verlust von Schmiermittel gering, und die Gelenke können im Rahmen der normalen Arbeitsunterbrüche nachgeschmiert werden. Bei ordnungsgemässer Schmierung der Kette und Zuführung von genügend Kühlmittel über die Führungsschiene erreicht dieses Führungsschienen-/Gliederkettensystem Standzeiten, welche ein Mehrfaches höher sind als bei bekannten Gliederketten für Beton, Gestein und Mauerwerk. Da die Bauteile der Kette aus flachen Elementen bestehen, welche nicht gebogen oder abgekröpft sind, können sie leicht massgenau geschliffen werden, wodurch sich eine kostengünstige Kette bauen lässt. Da die Schneidplatten auf Trägerplatten befestigt sind, besteht auch keine Gefahr, dass durch Auflöten die gehärteten Kettenglieder erweicht werden. Zudem können die Schneidplatten mit ihren Trägerplatten zum für die Fabrikation günstigsten Zeitpunkt an den Kettengliedern angebracht werden, was wiederum eine einfachere und günstigere Herstellung der Kette ermöglicht.The joints in the chain are completely shielded from the outside, and grinding and cutting dust cannot penetrate them. This is ensured on the one hand by the fact that the sliding surfaces of the joints are covered on all sides and on the other hand that lubricant is pressed outwards from the center of the joint in a consistent form over all sliding surfaces. Suitable lubricants are water-resistant greases with additives, e.g. Molybdenum and other known additives. In the contact areas of the sliding surfaces between the sliding elements and the sliding rails, the pressure of the coolant ensures that only small amounts of lubricant emerge from the sliding surfaces between the guide elements and the sliding elements. This means that there is little loss of lubricant and the joints can be relubricated as part of normal work breaks. With proper lubrication of the chain and supply of sufficient coolant via the guide rail, this guide rail / link chain system achieves a service life that is several times longer than that of known link chains for concrete, stone and masonry. Since the components of the chain consist of flat elements that are not bent or bent, they can easily be ground to exact dimensions, which means that a cost-effective chain can be built. Since the inserts are attached to carrier plates, there is no danger that the hardened chain links will be softened by soldering. In addition, the cutting plates with their carrier plates can be attached to the chain links at the most convenient time for production, which in turn enables the chain to be manufactured more easily and more cheaply.

Im folgoden wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnungen näher erläutert. Es zeigen:

Fig. 1
einen Ausschnitt aus einer Führungsschiene mit einer Gliederkette zu einer Kettensäge in Seitenansicht und
Fig. 2
einen Querschnitt durch die Gliederkette und den oberen Teil einer Führungsschiene mit einem Gelenk der Gliederkette.

An exemplary embodiment of the invention is explained in more detail below with reference to the drawings. Show it:
Fig. 1
a section of a guide rail with a link chain to a chainsaw in side view and
Fig. 2
a cross section through the link chain and the upper part of a guide rail with a joint of the link chain.

Der in Figur 1 dargestellte Ausschnitt aus einer Führungsschiene 1, bzw. einem Schwert einer Kettensäge, zeigt die vordere Seitenwand 18, das Zwischenstück 16, an welchem die Seitenwände befestigt sind und auf der richtigen Distanz zueinander gehalten werden, sowie die auf dem Zwischenstück 16 aufliegende obere Zusatzschiene 3. Diese Zusatzschiene 3 besteht im dargestellten Beispiel aus Bakelit, d.h. einem Schichtpressstoff, und ist satt gleitend in den Zwischenraum zwischen den Seitenwänden 18, 19 der Führungsschiene 1 eingefügt. Auf der Gleitfläche 15 der Zusatzschiene 3 liegen die Gleitelemente 6 der Gliederkette 2 auf. Die Gleitelemente 6 sind über Gelenke 5 mittels der Seitenführungselemente 7, 8 miteinander verbunden. An der oberen Seite der Gleitelemente 6 sind Schneidplatten 4 befestigt, welche aus diamantbestückten Hartmetallplatten gebildet sind.The section shown in Figure 1 from a guide rail 1, or a sword of a chainsaw, shows the front side wall 18, the intermediate piece 16, to which the side walls are attached and are held at the correct distance from each other, and the one lying on the intermediate piece 16 upper additional rail 3. In the example shown, this additional rail 3 consists of bakelite, ie a laminate, and is smoothly inserted into the space between the side walls 18, 19 of the guide rail 1. The sliding elements 6 of the link chain 2 rest on the sliding surface 15 of the additional rail 3. The sliding elements 6 are connected to one another via joints 5 by means of the side guide elements 7, 8. On the upper side of the sliding elements 6, cutting plates 4 are fastened, which are formed from diamond-tipped hard metal plates.

Figur 2 zeigt die Ausgestaltung der Gliederkette 2 und des Randbereiches der Führungsschiene 1 in vergrösserter Darstellung. Der dargestellte Schnitt geht dabei durch eines der Gelenke 5 und einen Kühlmittelkanal 13 in der Gleitschiene 3. Das Gelenk 5 besteht aus einem Bolzen 21, welcher an beiden Seiten abgesetzte Zapfen 23, 24 aufweist. Diese Zapfen 23, 24 haben einen kleineren Durchmesser als der Innenbereich des Bolzens 21. Dieser Bolzen 21 ist drehbar in einer Lagerbüchse 20 gelagert, welche fest sitzend in das Gleitelement 6 eingepresst ist. Die Zapfen 23 und 24 sind ihrerseits in Bohrungen in den Seitenführungselementen 7 bzw. 8 gelagert, wobei sie mit diesen Seitenführungselementen 7 und 8 in bekannter Weise fest verbunden sind. Im dargestellten Beispiel erfolgt dies dadurch, dass die Aussenflächen der Zapfen 23 und 24 ringförmig eingekerbt und dadurch Material nach aussen verdrängt und der Bolzen 21 mit den Seitenführungselementen 7 und 8 verklemmt wird. Die Abmessungen zwischen den beiden Seitenführungselementen 7 und 8 sowie die Breite der Lagerbüchse 20 und der Gleitelemente 6 sind so gewählt, dass die Gleitelemente 6 und die Seitenführungselemente 7, 8 spielfrei und leicht um die Achsen 22 gegeneinander schwenkbar sind. Die Seitenführungselemente 7 und 8 sind im weiteren so ausgebildet, dass sie die Seitenflächen 11, 12 der Zusatzschiene 3 überlappen, und dadurch die Gliederkette 2 mit möglichst geringem Spiel auf der Zusatzschiene 3 seitlich geführt ist. Die Gleitelemente 6 weisen an der unteren Seite Gleitflächen 9 auf, welche an der Gleitfläche 15 der Zusatzschiene 3 aufliegen. Durch die Zwischenstücke 16 in der Führungsschiene 1 führen vom Innenhohlraum der Führungsschiene 1 Kühlmittelkanäle 17 nach aussen. Von diesen Kühlmittelkanälen 17 gehen jeweils zwei Kühlmittelkanäle 13 aus, welche im Zentrum der Zusatzschiene 3 angeordnet sind. Die Austrittsöffnungen dieser Kühlmittelkanäle 13 befinden sich im Bereiche der Mittelachse 14 an der Gleitfläche 15 der Zusatzschiene 3. Das über die Führungsschiene 1 zugeführte Kühlmittel strömt somit durch die Kühlmittelkanäle 17 und 13 nach aussen und fliesst über die Gleitfläche 15 nach aussen ab.Figure 2 shows the configuration of the link chain 2 and the edge region of the guide rail 1 in an enlarged view. The section shown goes through one of the joints 5 and a coolant channel 13 in the slide rail 3. The joint 5 consists of a bolt 21 which has pins 23, 24 offset on both sides. These pins 23, 24 have a smaller diameter than the inner region of the pin 21. This pin 21 is rotatably mounted in a bearing bush 20, which is pressed into the sliding element 6 in a seated manner. The pins 23 and 24 are in turn mounted in bores in the side guide elements 7 and 8, wherein they are firmly connected to these side guide elements 7 and 8 in a known manner. In the example shown, this is done by notching the outer surfaces of the pins 23 and 24 in a ring-shaped manner and thereby displacing material to the outside, and clamping the bolt 21 with the side guide elements 7 and 8. The Dimensions between the two side guide elements 7 and 8 and the width of the bearing bush 20 and the sliding elements 6 are chosen so that the sliding elements 6 and the side guide elements 7, 8 are free of play and easily pivotable about the axes 22 against each other. The side guide elements 7 and 8 are further designed such that they overlap the side surfaces 11, 12 of the additional rail 3, and thereby the link chain 2 is laterally guided on the additional rail 3 with as little play as possible. The sliding elements 6 have sliding surfaces 9 on the lower side which rest on the sliding surface 15 of the additional rail 3. Coolant channels 17 lead through the intermediate pieces 16 in the guide rail 1 from the inner cavity of the guide rail 1 to the outside. Two coolant channels 13 each extend from these coolant channels 17 and are arranged in the center of the additional rail 3. The outlet openings of these coolant channels 13 are located in the region of the central axis 14 on the sliding surface 15 of the additional rail 3. The coolant supplied via the guide rail 1 thus flows outward through the coolant channels 17 and 13 and flows outward via the sliding surface 15.

Im Zentrum der Gelenke 5 befindet sich ein Schmiermittelkanal 25. Dieser Schmiermittelkanal 25 ist auf einer Seite durch einen Zapfen 30 verschlossen und weist an der anderen Seite ein mit einer Feder 31 belastetes Kugelventil 32 auf. Vom zentralen Schmiermittelkanal 25 gehen eine oder mehrere radiale Bohrungen 26 aus, welche Schmiermittelkanäle bilden und die Schmiermittelzufuhr zum Aussenmantel 27 des Bolzens 21 ermöglichen. Das Kugelventil 32 verhindert das Eindringen von Wasser, ermöglicht aber das Einpressen von wasserbeständigem Molybdän-Fett in die Schmiermittelkanäle 25 und 26. Entlang des Aussenmantels 27 des Bolzens 21 wird das Fett nach aussen gepresst und füllt auch die Gleitflächen zwischen den Gleitelementen 6 und den Seitenführungselementen 7 und 8 aus. Dadurch wird verhindert, dass Kühlmittel und Schleif- bzw. Schneidstaub zwischen die Gleitflächen eindringt und diese beschädigt. Beim Nachschmieren werden allfällig eingedrungene Schmutzpartikel nach aussen befördert, und auch der über die Kühlmittelkanäle 13 zugeführte Kühlmittelstrom befördert Schmutzpartikel aus dem Bereiche der Gleitflächen weg. Das Führungsschienen-/Gliederkettensystem weist dadurch einen Selbstreinigungseffekt auf und sorgt laufend für eine optimale Schmierung und einen Gleitfilm zwischen allen Gleitflächen. Da die Zapfen 23, 24 des Bolzens 21 mit den Seitenführungselementen 7 bzw. 8 formschlüssig verbunden sind, ist der Aussenmantel 27, bzw. die Gleitfläche des Bolzens 21 nach aussen abgekapselt und vor Verschmutzung geschützt.A lubricant channel 25 is located in the center of the joints 5. This lubricant channel 25 is closed on one side by a pin 30 and has a ball valve 32 loaded with a spring 31 on the other side. One or more radial bores 26 extend from the central lubricant channel 25 and form lubricant channels and enable the lubricant to be supplied to the outer jacket 27 of the bolt 21. The ball valve 32 prevents the ingress of water, but allows water-resistant molybdenum grease to be pressed into the lubricant channels 25 and 26. The grease is pressed outward along the outer jacket 27 of the bolt 21 and also fills the sliding surfaces between the sliding elements 6 and the side guide elements 7 and 8 off. This prevents coolant and grinding or cutting dust between the sliding surfaces penetrates and damages them. During relubrication, any dirt particles that have penetrated are conveyed outward, and the coolant flow supplied via the coolant channels 13 also carries dirt particles away from the areas of the sliding surfaces. The guide rail / link chain system therefore has a self-cleaning effect and continuously ensures optimal lubrication and a sliding film between all sliding surfaces. Since the pins 23, 24 of the bolt 21 are positively connected to the side guide elements 7 and 8, the outer casing 27 or the sliding surface of the bolt 21 is encapsulated to the outside and protected against contamination.

Wie aus Figur 1 und 2 erkennbar ist, sind die Schneidplatten 4 auf Trägerplatten 28 befestigt. Die Befestigung der Schneidplatten 4 auf den Trägerplatten 28 erfolgt normalerweise durch Hartlötverfahren. Die Trägerplatten 28 bedecken dabei die volle Grundfläche der Schneidplatten 4, wodurch sich zwischen den Schneidplatten 4 und den Trägerplatten 28 die grösstmögliche Haft- und Kontaktfläche ergibt. An den Gleitelementen 6 sind an der oberen Seite 10 entsprechende Aussparungen vorgesehen, wobei Nocken 29 die überstehenden Ränder der Trägerplatten 28 übergreifen, Die Befestigung der Trägerplatten 28 in den Aussparungen, bzw. an den Nocken 29 der Gleitelemente 6 erfolgt durch Kleben oder Annieten der Nocken 29. Dieses Befestigungsverfahren gewährleistet eine einfache und sichere Befestigung und verhindert, dass beim Befestigen der Schneidplatten 4 durch Lötverfahren die gehärteten Gleitelemente 6 wieder weich gemacht werden. Je nach Belastung der Kette und der Einsatzart weisen der Bolzen 21 und die Lagerbüchse 20 eine Härte von 55 bis 65 Rockwell C, bzw. HRC auf und die Gleitelemente 6 und die Seitenführungselemente 7 und 8 eine Härte von 35 bis 48 Rockwell C, bzw. HRC. Als Kühlmittel sind alle bekannten Schneid- und Kühlmittel für Gesteinsarbeiten einsetzbar.As can be seen from FIGS. 1 and 2, the cutting plates 4 are fastened on carrier plates 28. The cutting plates 4 are normally attached to the carrier plates 28 by brazing processes. The carrier plates 28 cover the full base of the cutting plates 4, which results in the greatest possible adhesion and contact area between the cutting plates 4 and the carrier plates 28. Corresponding recesses are provided on the sliding elements 6 on the upper side 10, cams 29 engaging over the projecting edges of the carrier plates 28. The carrier plates 28 are fastened in the recesses, or on the cams 29 of the sliding elements 6, by gluing or riveting the cams 29. This fastening method ensures simple and secure fastening and prevents the hardened sliding elements 6 from being softened again when the inserts 4 are fastened by soldering methods. Depending on the load on the chain and the type of use, the pin 21 and the bearing bush 20 have a hardness of 55 to 65 Rockwell C or HRC and the sliding elements 6 and the side guide elements 7 and 8 a hardness of 35 to 48 Rockwell C or HRC. All known cutting and cooling agents for stone work can be used as coolants.

Claims (6)

1. Guide rail and link chain system for chain saws for cutting concrete, stones and masonry, with a link chain, cooling medium channels guided through the guide rail, extra rails mounted on both longitudinal sides of the guide rail, and with chain links which have at least partly lateral guide elements and cutting plates mounted on the chain links, characterised in that between the link chain (2) and the extra rails (3) a track bed is formed on the guide rail (1), having extra rails (3) made of plastics material and a slide face (15), the link chain (2) consists alternately of metal slide elements (6) and pairs of flat lateral guide elements (7, 8) and these elements are joined together via hinges (5), the slide elements (6) have a slide face (9) on the under-side and these slide faces (9) rest on the slide face (15) of the extra rail (3), the cutting plates (4) are mounted on the opposite sides (10) of the slide elements (6), the extra rails (3) are provided with outward-oriented cooling medium channels (13), which are guided through the extra rails (3) and whose discharge apertures are mounted in the region of the central axis (14) of the slide face (15), and the lateral guide elements (7, 8) cover the outer side faces (11, 12) of the extra rail (3) on both sides and abut same.
2. Guide rail and link chain system for chain saw according to claim 1, characterised in that the hinge (5) consists of a bearing bushing (20) pressed into the slide element (6) and of a bolt (21) rotatably mounted in the bushing (20) with a stepped journal (23, 24) on both sides, these journals (23, 24) being mounted in the lateral guide elements (7, 8) and being rigidly joined thereto, and a lubricant channel (25) with radial bores (26) to the outer casing (27) of the bolt (21) is provided along the axis (22) of the bolt (21).
3. Guide rail and link chain system for chain saw according to claim 1 or 2, characterised in that the cutting plates (4) are fixed to a carrier plate (28) and this carrier plate (28) is connected rigidly to the slide element (6) by means of an adhesive or clip connexion.
4. Guide rail and link chain system for chain saw according to one of claims 1 to 3, characterised in that the bearing bushing (20) and the bolt (21) have a hardness of 55 to 65 Rockwell C and the slide elements (6) and guide elements (7, 8) have a hardness of 35 to 48 Rockwell C.
5. Guide rail and link chain system for chain saw according to one of claims 1 to 4, characterised in that the lubricant channels (25, 26) and all spaces between the hinges are filled with a water-resistant molybdenum grease.
6. Guide rail and link chain system for chain saw according to one of claims 1 to 5, characterised in that the slide rails (3) consist of a pressed laminate based on phenol resin.
EP87906654A 1986-12-23 1987-10-20 Guiding rail and link chain for chain saws Expired - Lifetime EP0293399B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87906654T ATE65956T1 (en) 1986-12-23 1987-10-20 GUIDE BAR AND LINK CHAIN FOR CHAINSAW.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5208/86 1986-12-23
CH5208/86A CH671181A5 (en) 1986-12-23 1986-12-23

Publications (2)

Publication Number Publication Date
EP0293399A1 EP0293399A1 (en) 1988-12-07
EP0293399B1 true EP0293399B1 (en) 1991-08-07

Family

ID=4289745

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87906654A Expired - Lifetime EP0293399B1 (en) 1986-12-23 1987-10-20 Guiding rail and link chain for chain saws

Country Status (7)

Country Link
US (1) US4896648A (en)
EP (1) EP0293399B1 (en)
AT (1) ATE65956T1 (en)
CH (1) CH671181A5 (en)
DE (1) DE3772050D1 (en)
DK (1) DK445788D0 (en)
WO (1) WO1988004602A1 (en)

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CH676215A5 (en) * 1988-07-07 1990-12-28 Gamma Stawag Ag Long life chain-saw blade
US5226404A (en) * 1989-09-22 1993-07-13 Mitsubishi Metal Corporation Cutting apparatus
US4971022A (en) * 1990-04-23 1990-11-20 Blount, Inc. Cutting chain for aggregate materials
EP0648586A1 (en) * 1993-10-19 1995-04-19 Etablissement Euroligna Maschinen Aggregate Industriebedarf Saw chain
US8151783B2 (en) * 2005-06-27 2012-04-10 Husqvarna Outdoor Products Inc. Tools and methods for making and using tools, blades and methods of making and using blades
US20060288992A1 (en) * 2005-06-27 2006-12-28 Anthony Baratta Tools and methods for making and using tools, blades and methods of making and using blades
BRPI0721684A2 (en) * 2007-05-17 2013-01-22 S T L Lubrifiants Inc system and method for lubricating a chainsaw with grease
US20180043566A1 (en) * 2015-03-04 2018-02-15 Husqvarna Ab Guide bar with internal cavity
ITUA20163683A1 (en) * 2016-05-23 2017-11-23 Bonomi Srl CUTTING CHAIN FOR REINFORCED CONCRETE CUTTING AND MORE
US10526891B2 (en) * 2018-03-29 2020-01-07 Diamond Stone Technologies Inc. Device and method for cutting quarry stone

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Also Published As

Publication number Publication date
CH671181A5 (en) 1989-08-15
WO1988004602A1 (en) 1988-06-30
DE3772050D1 (en) 1991-09-12
DK445788A (en) 1988-08-10
EP0293399A1 (en) 1988-12-07
US4896648A (en) 1990-01-30
DK445788D0 (en) 1988-08-10
ATE65956T1 (en) 1991-08-15

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