DE3744668C1 - Chain tensioner - Google Patents

Chain tensioner

Info

Publication number
DE3744668C1
DE3744668C1 DE19873744668 DE3744668A DE3744668C1 DE 3744668 C1 DE3744668 C1 DE 3744668C1 DE 19873744668 DE19873744668 DE 19873744668 DE 3744668 A DE3744668 A DE 3744668A DE 3744668 C1 DE3744668 C1 DE 3744668C1
Authority
DE
Germany
Prior art keywords
chain
housing
chain tensioner
tensioning elements
guide devices
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
Application number
DE19873744668
Other languages
German (de)
Inventor
Herbert Dipl-Ing Ampferer
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Priority to DE19873744668 priority Critical patent/DE3744668C1/en
Priority claimed from DE3719163A external-priority patent/DE3719163C1/en
Application granted granted Critical
Publication of DE3744668C1 publication Critical patent/DE3744668C1/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/022—Chain drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • 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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • 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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F01L2001/0537—Double overhead camshafts [DOHC]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/08—Endless member is a chain
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]
    • 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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0802—Actuators for final output members
    • F16H2007/0806—Compression coil springs
    • 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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0802—Actuators for final output members
    • F16H2007/0812—Fluid pressure
    • 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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
    • F16H2007/0859—Check valves
    • 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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0863—Finally actuated members, e.g. constructional details thereof
    • F16H2007/0874—Two or more finally actuated members
    • 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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0889—Path of movement of the finally actuated member
    • F16H2007/0891—Linear path

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

This chain tensioner acts by means of tensioning elements on the load strand and on the slack strand of an endless chain which cooperates preferably with chain wheels of parallel camshafts of an internal-combustion engine. The tensioning elements are provided with relatively movable pistons which are inserted one in the other, have a common pressure space and are accommodated in a cylindrical housing. So that the tensioning elements remain in their intended constructional position, guide devices are provided between the tensioning elements and the housing.

Description

Die Erfindung bezieht sich auf einen Kettenspanner nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a chain tensioner according to the Preamble of claim 1.

Es ist ein Kettenspanner bekannt (DE-GM 75 22 501), dessen Spannelemente unter dem Einfluß der Kettenbelastung aus ihrer vorgesehenen Lage ausweichen können, was dann zu Störungen und Beschädigungen des Kettenspanners führt.A chain tensioner is known (DE-GM 75 22 501), the Clamping elements under the influence of the chain load from their intended location can evade, which then leads to interference and Damage to the chain tensioner leads.

Aufgabe der Erfindung ist es, an einem Kettenspanner solche Vorkehrungen zu treffen, daß die Spannelemente stets in ihrer Konstruktionslage verbleiben.The object of the invention is such on a chain tensioner Take precautions that the clamping elements are always in their Construction position remain.

Erfindungsgemäß wird dies durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst. Weitere, die Erfindung ausgestaltende Merkmale enthalten die Unteransprüche.According to the invention this is due to the characterizing features of the Claim 1 solved. Further, embodying the invention Features contain the subclaims.

Die mit der Erfindung hauptsächlich erzielten Vorteile sind darin zu sehen, daß die Führungsvorrichtungen die Spannelemente in einer Lage fixieren, die eine gute Funktion des Kettenspanners sicherstellt. Darüber hinaus beanspruchen diese Führungsvorrichtungen wenig Bauraum, insbesondere in Längsrichtung der Brennkraftmaschine gesehen.The main advantages achieved with the invention are therein to see that the guide devices the clamping elements in a Fix position that the chain tensioner works well ensures. In addition, these claim Guide devices little space, especially in the longitudinal direction seen the internal combustion engine.

In der Zeichnung wird ein Ausführungsbeispiel der Erfindung gezeigt, das nachstehend näher beschrieben ist.In the drawing, an embodiment of the invention shown, which is described in more detail below.

Es zeigtIt shows

Fig. 1 eine schematische Darstellung eines Kettenantriebs mit dem erfindungsgemäßen Kettenspanner, Fig. 1 is a schematic representation of a chain drive with the chain tensioner according to the invention,

Fig. 2 einen Schnitt nach der Linie II-II der Fig. 1. Fig. 2 shows a section along the line II-II in FIG. 1.

Der Kettentrieb 1 umfaßt zwei Kettenräder 2, 3, die mit einer Endlos-Kette 4 zusammenarbeiten und an parallelen obenliegenden Nockenwellen 5, 6 einer Brennkraftmaschine angebracht sind. Die Nockenwellen 5, 6 betätigen V-förmig und hängend angeordnete Ventile, wobei pro Zylinder zwei Einlaß- und zwei Auslaßventile vorgesehen sind, was nicht gezeigt ist.The chain drive 1 comprises two chain wheels 2 , 3 , which work together with an endless chain 4 and are attached to parallel overhead camshafts 5 , 6 of an internal combustion engine. The camshafts 5 , 6 actuate valves arranged in a V-shape and in a hanging manner, two intake and two exhaust valves being provided per cylinder, which is not shown.

Zwischen dem Lasttrum 7 und dem Lostrum 8 ist ein Kettenspanner 9 angeordnet, der auf das Lasttrum 7 und das Lostrum 8 wirkende Spannelemente 10, 11 aufweist. Die Spannelemente 10, 11 besitzen auf den dem Lasttrum 7 und dem Lostrum 8 zugekehrten Seiten mit Wölbungen 12, 13 versehene Kunststoffbeläge 14, 15, die an metallischen Tragplatten 16, 17 befestigt sind. Die Tragplatten 16, 17 sind mit nicht gezeigten Kolben 18, 19 fest verbunden, die etwa senkrecht zum Lasttrum 7 und zum Lostrum 8 ausgerichtet sind. Die Kolben sind ineinandergesetzt und relativbeweglich in einem zylindrischen Gehäuse 20 untergebracht und werden mittels einer Druckfeder in Richtung der Kette gespannt; letzteres ist in der DE-PS 37 19 163 dargestellt.Between the loaded strand and the slack strand 7 8, a chain tensioner 9 is arranged, which on the tight side and the slack side 7 8 acting clamping elements 10, has. 11 The tensioning elements 10 , 11 have on the sides facing the load strand 7 and the lost drum 8 with bulges 12 , 13 provided with plastic coverings 14 , 15 which are fastened to metal support plates 16 , 17 . The support plates 16 , 17 are firmly connected to pistons 18 , 19 , not shown, which are oriented approximately perpendicular to the load run 7 and the lost run 8 . The pistons are nested and relatively movable in a cylindrical housing 20 and are tensioned in the direction of the chain by means of a compression spring; the latter is shown in DE-PS 37 19 163.

Zwischen dem Gehäuse 20 und den Spannelementen 10, 11 sind Führungsvorrichtungen 41, 42 vorgesehen. Die Führungsvorrichtungen 41, 42 werden einerseits durch seitliche Verlängerungen 43, 44 des Gehäuses 20 und andererseits durch Bolzen 45, 46 der Spannelemente 10, 11 gebildet, wobei die Bolzen 45, 46 relativbeweglich in Bohrungen 47, 48 der Verlängerungen 43, 44 angeordnet sind.Guide devices 41 , 42 are provided between the housing 20 and the clamping elements 10 , 11 . The guide devices 41 , 42 are formed on the one hand by lateral extensions 43 , 44 of the housing 20 and on the other hand by bolts 45 , 46 of the clamping elements 10 , 11 , the bolts 45 , 46 being arranged in relatively movable manner in bores 47 , 48 of the extensions 43 , 44 .

Schließlich sind das Gehäuse 20, das Befestigungsauge 25 und die Verlängerungen 43, 44 aus einem Stück hergestellt.Finally, the housing 20 , the mounting eye 25 and the extensions 43 , 44 are made in one piece.

Claims (3)

1. Kettenspanner für eine Endlos-Kette, vorzugsweise eines zwischen zwei parallelen Nockenwellen einer Brennkraftmaschine wirkenden Kettentriebs, wobei der Kettenspanner mit relativbeweglichen, an ineinandergesetzten, von einem Druckraum aus mit Öl beaufschlagbaren, in einem zylindrischen Gehäuse geführten Kolben vorgesehenen Spannelementen auf das Lasttrum und das Lostrum der Kette wirkt, dadurch gekennzeichnet, daß zwischen dem Gehäuse (20) und den Spannelementen (10, 11) Führungsvorrichtungen (41, 42) vorgesehen sind.1.Chain tensioner for an endless chain, preferably a chain drive acting between two parallel camshafts of an internal combustion engine, the chain tensioner having relatively movable tensioning elements on the load strand and that which are provided in nested pistons which can be loaded with oil from a pressure chamber and are guided in a cylindrical housing Lostrum of the chain acts, characterized in that guide devices ( 41 , 42 ) are provided between the housing ( 20 ) and the tensioning elements ( 10 , 11 ). 2. Kettenspanner nach Anspruch 1, dadurch gekennzeichnet, daß die Führungsvorrichtungen (41, 42) vom Gehäuse (20) seitlich weggeführte Verlängerungen (43, 44) aufweisen, in denen achsparallel zum Gehäuse (20) verlaufende Bohrungen (47, 48) vorgesehen sind, wobei in den Bohrungen (47, 48) relativbewegliche Bolzen (45, 46) der Spannelemente (10, 11) angeordnet sind.2. Chain tensioner according to claim 1, characterized in that the guide devices ( 41 , 42 ) from the housing ( 20 ) laterally extending extensions ( 43 , 44 ) in which axially parallel to the housing ( 20 ) bores ( 47 , 48 ) are provided , wherein relatively movable bolts ( 45 , 46 ) of the clamping elements ( 10 , 11 ) are arranged in the bores ( 47 , 48 ). 3. Kettenspanner nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß das Gehäuse (20), das Befestigungsauge (25) und die Verlängerung (43, 44) aus einem Stück hergestellt sind.3. Chain tensioner according to claims 1 and 2, characterized in that the housing ( 20 ), the mounting eye ( 25 ) and the extension ( 43 , 44 ) are made in one piece.
DE19873744668 1987-06-09 1987-06-09 Chain tensioner Expired DE3744668C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19873744668 DE3744668C1 (en) 1987-06-09 1987-06-09 Chain tensioner

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3719163A DE3719163C1 (en) 1987-06-09 1987-06-09 Chain tensioner
DE19873744668 DE3744668C1 (en) 1987-06-09 1987-06-09 Chain tensioner

Publications (1)

Publication Number Publication Date
DE3744668C1 true DE3744668C1 (en) 1988-09-22

Family

ID=25856441

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873744668 Expired DE3744668C1 (en) 1987-06-09 1987-06-09 Chain tensioner

Country Status (1)

Country Link
DE (1) DE3744668C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10341799B4 (en) * 2003-09-10 2015-02-19 Joh. Winklhofer & Söhne GmbH und Co. KG Clamping element with guide arms

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NICHTS ERMITTELT *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10341799B4 (en) * 2003-09-10 2015-02-19 Joh. Winklhofer & Söhne GmbH und Co. KG Clamping element with guide arms

Similar Documents

Publication Publication Date Title
DE3326319A1 (en) CHAIN DRIVE OF A PISTON PISTON INTERNAL COMBUSTION ENGINE
DE3421028A1 (en) CAMSHAFT DRIVE OF AN INTERNAL COMBUSTION ENGINE
EP0294559B1 (en) Chain tensioner
DE4326159C5 (en) Water-cooled multi-cylinder internal combustion engine with V-shaped rows of cylinders
DE2655102A1 (en) CHAIN DRIVE, IN PARTICULAR FOR THE STEERING DRIVE OF COMBUSTION ENGINE
AT402088B (en) INTERNAL COMBUSTION ENGINE WITH CYLINDERS ARRANGED IN SERIES AND AN OVERHEAD CAMSHAFT FOR ACTUATING THE INLET AND / OR EXHAUST VALVES
EP0566845B1 (en) Device for varying the angular position of a camshaft
DE4337827A1 (en) Device for tensioning a camshaft drive
EP0622534B1 (en) Internal combustion engine with two cylinderbanks
DE1550905A1 (en) Automatic hydraulic adjusting element for tensioning tension members, especially for the drive chain of camshafts of an internal combustion engine
EP0266511A1 (en) Valve-timing influencing device
EP1099827A1 (en) Chain guide for an internal combustion engine camshaft drive and a method for producing a chain guide
DE102013110267B4 (en) KETTENSPANNER LEVER
DE3744668C1 (en) Chain tensioner
DE3347638A1 (en) Drive for two camshafts, arranged in the cylinder head of an internal combustion engine, by means of a flexible mechanism such as a timing chain or toothed belt, from the crankshaft
DE3328677C2 (en)
EP0779450B1 (en) Hydraulic tensioner for flexible elements driving a camshaft
DE19719732C1 (en) Slide rail for a chain drive
DE102017111948B4 (en) Transport lock for a hydraulic clamping device
DE3916512C1 (en)
DE3630466A1 (en) MULTI-CYLINDER INTERNAL COMBUSTION ENGINE
DE10021220A1 (en) Internal combustion engine with chain drive has injection jet device including injection jet running adjacent to chain and at least one guide liner
AT404167B (en) MULTI-CYLINDER FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES
DE19955894C1 (en) IC engine has guide for drive chain between crankshaft and camshaft provided integral with cover enclosing space containing drive chain
DE2262570B2 (en)

Legal Events

Date Code Title Description
AC Divided out of

Ref country code: DE

Ref document number: 3719163

Format of ref document f/p: P

8100 Publication of the examined application without publication of unexamined application
AC Divided out of

Ref country code: DE

Ref document number: 3719163

Format of ref document f/p: P

D1 Grant (no unexamined application published) patent law 81
8364 No opposition during term of opposition
8320 Willingness to grant licenses declared (paragraph 23)
8339 Ceased/non-payment of the annual fee