CH88247A - Device for automatically holding drive belts taut. - Google Patents

Device for automatically holding drive belts taut.

Info

Publication number
CH88247A
CH88247A CH88247DA CH88247A CH 88247 A CH88247 A CH 88247A CH 88247D A CH88247D A CH 88247DA CH 88247 A CH88247 A CH 88247A
Authority
CH
Switzerland
Prior art keywords
belt
drive belts
rollers
tensioning
tension
Prior art date
Application number
Other languages
German (de)
Inventor
Cie Aktiengesellschaft Boveri
Original Assignee
Bbc Brown Boveri & Cie
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 Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Publication of CH88247A publication Critical patent/CH88247A/en

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
    • F16H7/1254—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means
    • F16H7/1281—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means where the axis of the pulley moves along a substantially circular path
    • 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
    • F16H2007/0808—Extension 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
    • F16H2007/0821—Actuators for final output members working with gravity
    • 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

Description

  

  Vorrichtung zum selbsttätigen Straffhalten von Treibriemen.    Um einen Treibriemen während des Be  triebes selbsttätig straff zu halten oder bei  Riementrieben mit von 1 verschiedenem  Übersetzungsverhältnis den umspannten Bo  gen der kleinen Scheibe zu vergrössern, be  dient man sich seit vielen Jahren einer  Spannrolle, deren Spannung durch ihr Ei  gengewicht und ein meist verstellbares Zu  satz- oder Gegengewicht gegeben ist, wobei  das Zusatz- oder Gegengewicht auch durch  die Kraft einer oder mehrerer Federn ersetzt.  werden kann. Dabei ist es aus technischen  Gründen erforderlich, die Spannrolle auf  das gezogene Trum des Riemens einwirken  zu lassen.  



  Die Erfindung bezieht sich nun auf Rie  menübertragungen mit wechselnder Kraft  richtung, bei denen also entweder der Dreh  sinn sich ändert oder die Maschine einmal  treibt und das andere Mal getrieben wird.  Nach der Erfindung werden daher zwei  Spannrollen verwendet, die nicht auf dem  gleichen Trum des Riemens laufen.  



  In der Zeichnung, die mehrere Ausfüh  rungsbeispiele des Erfindungsgegenstandes  zeigt, bedeutet jeweils a die kleine Riemen-    Scheibe und b den Riemen; mit c und d sind  die beiden Bleichgrossen Spannrollen be  zeichnet, die symmetrisch zur Verbindungs  ebene der Axe der kleinen Scheibe u mit der  Axe der grossen Riemenscheibe angeordnet  sind. Fig. 1 und 2 sind Beispiele für hori  zontalen, Fig. 3 bis 5 solche für vertikalen  Riementrieb.  



  Gemäss Fig. 1 wird die Spannung des  oberen Trums lediglich durch das Eigen  gewicht der Spannrolle c (nebst Lenker) er  zielt, während das untere Trum durch das  Fremdgewicht e angespannt wird. Nach  Fig. 2 dienen die zwei Gewichte e zum Aus  gleich der Rollengewichte, während die  Spannung des Riemens durch die gemein  same Feder f erzielt wird.  



  Bei dem Vertikaltrieb nach Fig. 3 sind  die Spannrollen c und d an Winkelhebeln  g, h aufgehängt und werden gemeinsam  durch das an einem Hebel. wirkende Ge  wicht     (Kraftglied)        c        a,ngepresst:    die von dem  Gewicht ausgeübten     Kräfte    sind durch  Pfeile angedeutet.  



  Die beiden     Ausführungsformen    nach       Fib.    4     und    5     unterscheiden    sich nur da-      durch, dass nach Fig. 4 die beiden Roller, c  und d an getrennten Punkten pendelnd auf  gehängt sind. während nach Fig. 5 die Auf  hängungsachse für die Pendelglieder beider  Rollen gemeinsam ist. In beiden Fällen wird  die Riemenspannung durch eine Feder f  als gemeinsames Kraftglied erzeugt.



  Device for automatically holding drive belts taut. In order to keep a drive belt taut automatically during operation or to enlarge the spanned arc of the small pulley in belt drives with a gear ratio different from 1, a tension pulley has been used for many years, the tension of which is counterbalanced by its own weight and a mostly adjustable closing Set or counterweight is given, the additional or counterweight also being replaced by the force of one or more springs. can be. For technical reasons, it is necessary to let the tension pulley act on the drawn strand of the belt.



  The invention now relates to belt transmissions with alternating force direction, in which either the sense of rotation changes or the machine drives once and the other time it is driven. According to the invention, therefore, two tensioning rollers are used which do not run on the same strand of the belt.



  In the drawing, which shows several Ausfüh approximately examples of the subject matter of the invention, a each denotes the small pulley and b the belt; with c and d, the two bleach-sized tensioning rollers are marked, which are arranged symmetrically to the connection plane of the axis of the small pulley u with the axis of the large pulley. Fig. 1 and 2 are examples of hori zontal, Fig. 3 to 5 those for vertical belt drive.



  According to Fig. 1, the tension of the upper run is only through the own weight of the tension pulley c (along with the handlebar) he aims, while the lower run is tensed by the external weight e. According to Fig. 2, the two weights e are used to equalize the roller weights, while the tension of the belt is achieved by the common spring f.



  In the vertical drive according to FIG. 3, the tensioning rollers c and d are suspended from angle levers g, h and are jointly connected to a lever. Acting Ge weight (force link) c a, pressed: the forces exerted by the weight are indicated by arrows.



  The two embodiments according to Fib. 4 and 5 differ only in that, according to FIG. 4, the two rollers, c and d are suspended pendulum at separate points. while according to Fig. 5 on the suspension axis for the pendulum members of both roles is common. In both cases, the belt tension is generated by a spring f as a common force element.

Claims (1)

PATENTANSPRUCH: Vorrichtung zum selbsttätigen Straffhal ten von Treibriemen mit wechselnder Kraft richtung, gekennzeichnet durch zwei Spann rollen, die nicht auf dem gleichen Trum des Riemens laufen. UNTERANSPRÜCHE 1. Vorrichtung nach Patentanspruch, da durch gekennzeichnet, dass die beiden Spannrollen gleichgross und symmetrisch zu der Verbindungsebene der Riemen- scheibenaxen angeordnet sind. 2. Vorrichtung nach Patentanspruch, da durch gekennzeichnet, dass die beiden Spannrollen durch ein gemeinsames Kraftglied an den Riemen angepresst werden. 3. Vorrichtung nach Patentanspruch und Unteranspruch 2, dadurch gekennzeich net, dass das die beiden Spannrollen an den Riemen anpressende Kraftglied eine Feder ist. 4. PATENT CLAIM: Device for the automatic tensioning of drive belts with alternating direction of force, characterized by two tension rollers that do not run on the same strand of the belt. SUBClaims 1. Device according to patent claim, characterized in that the two tensioning rollers are of the same size and are arranged symmetrically to the connecting plane of the belt pulley axes. 2. Device according to claim, characterized in that the two tensioning rollers are pressed against the belt by a common force member. 3. Device according to claim and dependent claim 2, characterized in that the force member pressing the two tension rollers on the belt is a spring. 4th Vorrichtung nach Patentanspruch und Unteranspruch 2, dadurch gekennzeich- net, dass die Spannrollen an Winkelhebeln aufgehängt sind, deren freie Hebelarme unter dem Einflusse eines gemeinsamen Gewichtes stehen. Device according to patent claim and dependent claim 2, characterized in that the tensioning rollers are suspended from angle levers, the free lever arms of which are under the influence of a common weight.
CH88247D 1920-03-08 1920-03-08 Device for automatically holding drive belts taut. CH88247A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH88247T 1920-03-08

Publications (1)

Publication Number Publication Date
CH88247A true CH88247A (en) 1921-04-16

Family

ID=4345145

Family Applications (1)

Application Number Title Priority Date Filing Date
CH88247D CH88247A (en) 1920-03-08 1920-03-08 Device for automatically holding drive belts taut.

Country Status (1)

Country Link
CH (1) CH88247A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2940189A (en) * 1957-06-21 1960-06-14 Cleveland Trencher Co Excavating machine
WO2003062669A1 (en) * 2002-01-22 2003-07-31 The Gates Corporation Belt installation tool
DE102006033125A1 (en) * 2006-07-18 2008-01-24 Schaeffler Kg Tensioning unit for belts or chains in IC engines comprises spring-loaded lever with curved lower surface which cooperates with upper surface of swiveling tensioning plate, chain or belt being fitted over curved lower surface of plate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2940189A (en) * 1957-06-21 1960-06-14 Cleveland Trencher Co Excavating machine
WO2003062669A1 (en) * 2002-01-22 2003-07-31 The Gates Corporation Belt installation tool
DE102006033125A1 (en) * 2006-07-18 2008-01-24 Schaeffler Kg Tensioning unit for belts or chains in IC engines comprises spring-loaded lever with curved lower surface which cooperates with upper surface of swiveling tensioning plate, chain or belt being fitted over curved lower surface of plate

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