DE4039815C1 - Tensioner for belt drive with sprung tension roller - has tensioning spring integrated in damping member, with sectional piston rod - Google Patents

Tensioner for belt drive with sprung tension roller - has tensioning spring integrated in damping member, with sectional piston rod

Info

Publication number
DE4039815C1
DE4039815C1 DE19904039815 DE4039815A DE4039815C1 DE 4039815 C1 DE4039815 C1 DE 4039815C1 DE 19904039815 DE19904039815 DE 19904039815 DE 4039815 A DE4039815 A DE 4039815A DE 4039815 C1 DE4039815 C1 DE 4039815C1
Authority
DE
Germany
Prior art keywords
piston rod
tensioning
lever
belt drive
damping member
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 - Fee Related
Application number
DE19904039815
Other languages
German (de)
Inventor
Hans Dipl.-Ing. Schwiedessen
Gerd Dipl.-Ing. 7000 Stuttgart De Niemeier
Rolf Dipl.-Ing. Klingmann (Fh), 7067 Pluederhausen, De
Ulrich Dipl.-Ing. Conrad (Fh), 7144 Asperg, De
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.)
Daimler Benz AG
Original Assignee
Mercedes Benz 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 Mercedes Benz AG filed Critical Mercedes Benz AG
Priority to DE19904039815 priority Critical patent/DE4039815C1/en
Application granted granted Critical
Publication of DE4039815C1 publication Critical patent/DE4039815C1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
    • F16H7/1209—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley with vibration damping means
    • F16H7/1236—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley with vibration damping means of the fluid and restriction type, e.g. dashpot
    • 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
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
    • 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
    • F02B2275/06—Endless member is a belt
    • 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
    • F16H2007/0893—Circular path

Landscapes

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

Abstract

The belt drive tensioner incorporates a spring (17)-loaded tension roller (1). A damping member (10) consists of a piston rod (14) and securing eyelets (8) and is attached by the latter to a support (5). A tensioning lever is pivoted on the support and is moved by a handle. The tension spring is integrated in the damping member, with the piston rod divided into two sections (24,25), joined by a link (23). One piston rod section (24) is pivoted by an eyelet (27) onto the support and forms the tensioning lever. The securing eyelet has a sleeve (28) for inserting a grip bar (30) as handle. ADVANTAGE - Compact design for belt drive prestressing.

Description

Die Erfindung betrifft eine Spannvorrichtung für einen Hüll­ trieb, insbesondere Riementrieb, gemäß den im Oberbegriff des Patentanspruchs 1 angegebenen Merkmalen.The invention relates to a tensioning device for an envelope drive, especially belt drive, according to the in the preamble of Features specified claim 1.

Eine Spannvorrichtung der gattungsgemäßen Bauart ist aus der DE-PS 32 08 184 bekannt. Dabei wird eine Vorspannung des Rie­ mentriebs durch Schwenken eines separat an einem Tragteil an­ gebrachten Spannhebels erzielt, welcher über eine an ihm ein­ gehängte Spannfeder eine Spannrolle gegen den Riementrieb drückt. Durch die Verwendung eines gesondert angebrachten Spannhebels und einer Spannfeder ist jedoch zusätzlicher Bau­ raum und Montageaufwand erforderlich. Zudem ist die Spannfeder gegenüber äußeren Einflüssen ungeschützt aufgehängt, so daß die Funktionstüchtigkeit des Riementriebs leicht gefährdet werden kann.A clamping device of the generic type is from the DE-PS 32 08 184 known. Thereby a preload of the Rie drive by pivoting one separately on a support part brought tension lever achieved, which one on him suspended tension spring a tension roller against the belt drive presses. By using a separately attached Clamping lever and a tension spring is additional construction space and assembly effort required. In addition, the tension spring hung unprotected against external influences, so that the Functionality of the belt drive are at risk can.

Ferner sind aus der DE-OS 39 15 227 A1 und der US-PS 47 90 801 bei Riemenspannvorrichtungen hydraulisch arbeitende Dämpfungs­ elemente bekannt, in welchen eine Spannfeder integriert ist. Jedoch kann bei diesen Spannvorrichtungen zum Zwecke beispiels­ weise eines Riemenwechsels die Spannrolle nur langsam und mit erheblichem Aufwand von einer gespannten in eine entspannte Stellung und wieder zurück gebracht werden.Furthermore, from DE-OS 39 15 227 A1 and US-PS 47 90 801 Hydraulic damping in belt tensioners elements known in which a tension spring is integrated. However, in these tensioners for example the belt tensioner only slowly and with a belt change considerable effort from a tense to a relaxed Position and brought back again.

Der Erfindung liegt die Aufgabe zu Grunde, eine Spannvorrich­ tung gattungsgemäßer Bauart zu schaffen, bei der Bauraum gespart und ohne wesentlichen Mehraufwand an Bauteilen eine Vorspannung des Hülltriebes ermöglicht wird.The invention is based on the object, a cocking device to create generic design in the construction space  saved and one without significant additional effort on components Biasing of the enveloping drive is made possible.

Die Aufgabe ist erfindungsgemäß durch die im Patentanspruch 1 angegebenen kennzeichnenden Merkmale gelöst.The object is according to the invention in that in claim 1 specified characteristic features solved.

Dabei ist die Spannfeder im Dämpfungselement integriert, wobei Bauraum eingespart wird. Des weiteren ist die Kolbenstange des Dämpfungselementes in zwei über ein Gelenk verbundene Kolben­ stangenabschnitte geteilt, wobei ein Kolbenstangenabschnitt mit einem Befestigungsauge am Tragteil schwenkbar gelagert ist und den Spannhebel bildet. Dadurch wird eine Vorspannung des Hülltriebes ohne wesentlichen Mehraufwand an Bauteilen ermög­ licht. Die Montage der Spannfeder entfällt, da ein derartiges Dämpfungselement mit Spannfeder ein einzelnes vormontiertes Bauteil bildet.The tension spring is integrated in the damping element, whereby Space is saved. Furthermore, the piston rod of the Damping element in two pistons connected by a joint divided rod sections, with a piston rod section is pivotally mounted on the supporting part with a fastening eye and forms the tension lever. This will bias the Envelope drive possible without significant additional effort on components light. The assembly of the tension spring is not necessary because of such Damping element with tension spring a single pre-assembled Component forms.

Als weitere vorteilhafte Ausgestaltung ist nach Anspruch 2 am Befestigungsauge eine Hülse zum Einstecken beispielsweise einer Griffstange zum Verschwenken des Spannhebels vorgesehen.As a further advantageous embodiment, according to claim 2 Fastening eye a sleeve for inserting one, for example Handlebar provided for pivoting the clamping lever.

In der nachfolgenden Zeichnungsbeschreibung wird ein Ausfüh­ rungsbeispiel der Erfindung näher erläutert.In the following description of the drawing, an exec Example of the invention explained in more detail.

Eine Spannvorrichtung mit einer Spannrolle 1 zum Nachspannen eines Riemens 2 besteht aus einem zweiarmigen drehbaren Rol­ lenhebel 3, der über seine Drehachse 4 an einem feststehenden Tragteil 5, z. B. an dem Gehäuse einer Brennkraftmaschine, be­ festigt ist. Ein Ende 6 des Rollenhebels 3 trägt die Spannrolle 1, die gegen den aufliegenden Riemen 2 drückt. Am anderen Ende 7 des Rollenhebels 3 ist ein Befestigungsauge 8 angebracht, welches mit einem Mantelrohr 9 eines Dämpfungselementes 10 ver­ bunden ist. Am Boden 11 des Dämpfungselementes 10, das von dem Mantelrohr 9 umhüllt ist, ist eine Zylinderbuchse 12 angebracht, in die ein Ende 13 einer in das Mantelrohr 9 ra­ genden Kolbenstange 14 eintaucht. Zwischen einem Stützring 15, der das Ende 13 der Kolbenstange 14 mit Abstand umgibt, und einem am Boden 11 ausgebildeten Anschlag 16 stützt sich eine die Zylinderbuchse 12 koaxial umgebende Spannfeder 17 ab, die den Boden 11 mit der Zylinderbuchse 12 und die Kolbenstange 14 in entgegengesetzte Richtungen auseinanderdrückt. Das Ende 13 weist außerdem ein Drosselventil 18 auf, das einen innerhalb der Zylinderbuchse 12 liegenden Arbeitsraum 19 mit einem mit Öl gefüllten Vorratsraum 20 verbindet, welcher von einer Innen­ seite 21 des Mantelrohres 9 und einer Außenseite 22 der Zylin­ derbuchse 12 begrenzt wird. Die aus dem Mantelrohr 9 ragende Kolbenstange 14 besitzt außerhalb des Mantelrohrs 9 ein Gelenk 23, welches die Kolbenstange 14 in zwei Abschnitte 24 und 25 gliedert. Der Abschnitt 24 ist dabei schwenkbar und bildet ei­ nen Spannhebel der Spannvorrichtung. Der Abschnitt 24 weist an einem oberen Ende 26 ein Befestigungsauge 27 auf, das am Trag­ teil 5 ortsfest gelagert ist. Diametral dem Abschnitt 24 ge­ genüberliegend ist am Befestigungsauge 27 eine Hülse 28 befes­ tigt, in der ein Ende 29 einer Griffstange 30 eingesteckt wer­ den kann.A tensioning device with a tensioning roller 1 for retensioning a belt 2 consists of a two-armed rotatable lever len 3 , which on its axis of rotation 4 on a fixed support member 5 , z. B. on the housing of an internal combustion engine, be fastened. One end 6 of the roller lever 3 carries the tension roller 1 , which presses against the belt 2 lying thereon. At the other end 7 of the roller lever 3 , a mounting eye 8 is attached, which is connected to a jacket tube 9 of a damping element 10 connected. At the bottom 11 of the damping element 10 , which is enveloped by the jacket tube 9 , a cylinder sleeve 12 is attached, in which one end 13 of a piston rod 14 in the jacket tube 9 ra dips. Between a support ring 15 which surrounds the end 13 of the piston rod 14 with spacing, and a formed on the bottom 11 of the stop 16 is supported a cylinder sleeve 12 coaxially surrounding the tension spring 17 from which the floor 11 with the cylinder liner 12 and the piston rod 14 in opposite Directions apart. The end 13 also has a throttle valve 18 which connects one lying inside the cylinder liner 12 working space 19 having an oil-filled reservoir 20, which side of an inner 21 of the casing tube 9 and an outer side 22 of the Zylin the bushing is limited 12th The piston rod 14 protruding from the tubular casing 9 has a joint 23 outside the tubular casing 9 , which divides the piston rod 14 into two sections 24 and 25 . The section 24 is pivotable and forms egg NEN clamping lever of the clamping device. The section 24 has at an upper end 26 a mounting eye 27 which is mounted on the supporting part 5 stationary. Diametrically opposite the portion 24 is open at genüberliegend fastening eye 27, a sleeve 28 Untitled buildin, in which one end 29 is inserted a handlebar 30 who the can.

Bei der Montage des Riemens 2 nimmt der Rollenhebel 3 zunächst die durch unterbrochene Linien gekennzeichnete entspannte Lage ein. Wird der Spannhebel mittels der Griffstange 30 im Uhrzei­ gersinn geschwenkt, scheren die Abschnitte 24 und 25 auseinan­ der, wobei das Dämpfungselement 10 eine seitlich verschobene Abwärtsbewegung erfährt. Dadurch wird der Rollenhebel 3 entge­ gen dem Uhrzeigersinn gedreht, wobei die an ihm angebrachte Spannrolle 1 den Riemen 2 nach oben drückt und diesen spannt. Ein Punkt maximaler Spannung ist dann erreicht, wenn der Winkel zwischen den beiden Abschnitten 24, 25 180° beträgt. Diese kön­ nen dabei mit einer Befestigungsschraube 31 in dieser Stellung fixiert werden, wobei die Befestigungsschraube 31 durch zwei an den Abschnitten 24 und 25 dafür vorgesehenen Gewindebohrungen 32, 33 geschraubt wird. Dadurch wird eine definierte Vor­ spannungseinstellung am Riemen 2 erzielt.When assembling the belt 2 , the roller lever 3 first assumes the relaxed position indicated by broken lines. If the tension lever is pivoted clockwise by means of the handle bar 30 , the sections 24 and 25 shear apart, the damping element 10 experiencing a laterally displaced downward movement. As a result, the roller lever 3 is rotated counterclockwise, the tensioning roller 1 attached to it pressing the belt 2 upwards and tensioning it. A point of maximum tension is reached when the angle between the two sections 24 , 25 is 180 °. This Kgs NEN be fixed in this position it with a fixing screw 31, the fastening screw 31 is screwed by two at the sections 24 and 25 provided for this purpose threaded holes 32., 33 A defined tension setting on the belt 2 is thereby achieved.

Claims (2)

1. Spannvorrichtung für einen Hülltrieb, insbesondere Riemen­ trieb, mit einer Spannrolle, die unter der Wirkung einer Spann­ feder eine Vorspannung im Hülltrieb erzeugt, ferner mit einem eine Kolbenstange und Befestigungsaugen aufweisenden Dämpfungs­ element, das einerseits über ein Befestigungsauge an einem die Spannrolle tragenden Rollenhebel angelenkt ist und andererseits über ein Befestigungsauge an einem Tragteil abgestützt ist, des weiteren mit einem Spannhebel, der am Tragteil schwenkbar gela­ gert und mit der Spannfeder verbunden ist und mit einer Handha­ be, mittels welcher durch Verschwenken des Spannhebels die Spannrolle aus einer entspannten in eine gespannte Stellung verschwenkbar ist, dadurch gekennzeichnet, daß die Spannfeder (17) im Dämpfungselement (10) integriert ist und daß die Kolbenstange (14) des Dämpfungselementes (10) in zwei über ein fixierbares Gelenk (23) verbundene Kolbenstangenabschnitte (24) und (25) geteilt ist, wobei der Kolbenstangenabschnitt (24) mit einem Befestigungsauge (27) am Tragteil (5) schwenkbar gelagert ist und den Spannhebel bildet.1. tensioning device for an enveloping drive, in particular belt driven, with a tensioning roller which produces a prestress in the enveloping drive under the action of a tensioning spring, furthermore with a damping element having a piston rod and fastening eyes, which on the one hand has a fastening eye on a roller lever carrying the tensioning roller is articulated and on the other hand is supported by a fastening eye on a supporting part, further with a tensioning lever which is pivotally mounted on the supporting part and is connected to the tensioning spring and with a handle by means of which the tensioning roller is pivoted from a relaxed into a by pivoting the tensioning lever Tensioned position can be pivoted, characterized in that the tension spring ( 17 ) is integrated in the damping element ( 10 ) and in that the piston rod ( 14 ) of the damping element ( 10 ) consists of two piston rod sections ( 24 ) and ( 25 ) connected via a fixable joint ( 23 ) ) is divided, with the piston rod en section ( 24 ) with a mounting eye ( 27 ) on the support member ( 5 ) is pivotally mounted and forms the clamping lever. 2. Spannvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß am Befestigungsauge (27) eine Hülse (28) zum Einstecken einer Griffstange (30) als Handhabe angebracht ist.2. Clamping device according to claim 1, characterized in that on the fastening eye ( 27 ) a sleeve ( 28 ) for inserting a handle bar ( 30 ) is attached as a handle.
DE19904039815 1990-12-13 1990-12-13 Tensioner for belt drive with sprung tension roller - has tensioning spring integrated in damping member, with sectional piston rod Expired - Fee Related DE4039815C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19904039815 DE4039815C1 (en) 1990-12-13 1990-12-13 Tensioner for belt drive with sprung tension roller - has tensioning spring integrated in damping member, with sectional piston rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19904039815 DE4039815C1 (en) 1990-12-13 1990-12-13 Tensioner for belt drive with sprung tension roller - has tensioning spring integrated in damping member, with sectional piston rod

Publications (1)

Publication Number Publication Date
DE4039815C1 true DE4039815C1 (en) 1992-05-27

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DE19904039815 Expired - Fee Related DE4039815C1 (en) 1990-12-13 1990-12-13 Tensioner for belt drive with sprung tension roller - has tensioning spring integrated in damping member, with sectional piston rod

Country Status (1)

Country Link
DE (1) DE4039815C1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1146209A2 (en) 2000-04-12 2001-10-17 Modine Manufacturing Company Fan drive
WO2006061070A1 (en) * 2004-12-07 2006-06-15 Schaeffler Kg Tensioning device for a belt drive

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3208184C1 (en) * 1982-03-06 1983-10-06 Daimler Benz Ag Tensioning device for a sleeve drive, in particular a belt drive
US4790801A (en) * 1988-04-04 1988-12-13 Ina Walzlager Schaeffler Kg Mechanic-hydraulic actuating element for a belt tightener
DE3915227A1 (en) * 1988-06-18 1989-12-21 Schroeder Werner Device for tensioning driving belts, particularly for motor vehicles

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3208184C1 (en) * 1982-03-06 1983-10-06 Daimler Benz Ag Tensioning device for a sleeve drive, in particular a belt drive
US4790801A (en) * 1988-04-04 1988-12-13 Ina Walzlager Schaeffler Kg Mechanic-hydraulic actuating element for a belt tightener
DE3915227A1 (en) * 1988-06-18 1989-12-21 Schroeder Werner Device for tensioning driving belts, particularly for motor vehicles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1146209A2 (en) 2000-04-12 2001-10-17 Modine Manufacturing Company Fan drive
EP1146209A3 (en) * 2000-04-12 2003-03-05 Modine Manufacturing Company Fan drive
WO2006061070A1 (en) * 2004-12-07 2006-06-15 Schaeffler Kg Tensioning device for a belt drive

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Legal Events

Date Code Title Description
8100 Publication of the examined application without publication of unexamined application
D1 Grant (no unexamined application published) patent law 81
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: DAIMLER-BENZ AKTIENGESELLSCHAFT, 70567 STUTTGART,

8327 Change in the person/name/address of the patent owner

Owner name: DAIMLERCHRYSLER AG, 70567 STUTTGART, DE

8339 Ceased/non-payment of the annual fee