DE2828524A1 - Pulley for adjustable ratio belt drive - has radially sliding belt supports between axially movable discs which set pulley dia. - Google Patents
Pulley for adjustable ratio belt drive - has radially sliding belt supports between axially movable discs which set pulley dia.Info
- Publication number
- DE2828524A1 DE2828524A1 DE19782828524 DE2828524A DE2828524A1 DE 2828524 A1 DE2828524 A1 DE 2828524A1 DE 19782828524 DE19782828524 DE 19782828524 DE 2828524 A DE2828524 A DE 2828524A DE 2828524 A1 DE2828524 A1 DE 2828524A1
- Authority
- DE
- Germany
- Prior art keywords
- pulley
- belt drive
- dia
- discs
- axially movable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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
- F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
- F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
- F16H9/04—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes
- F16H9/10—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley provided with radially-actuatable elements carrying the belt
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmissions By Endless Flexible Members (AREA)
Abstract
Description
Verstellbares Umschlingungsgetriebe Adjustable belt drive
Die Erfindung bezieht sich auf ein verstellbares Umschlingungsgetriebe mit zwei Kegelscheibenpaaren, die axial gegeneinander verschiebbar sind, und mit einem Zugmittel zur Drehmomentübertragung.The invention relates to an adjustable belt drive with two pairs of conical disks, which can be axially displaced against one another, and with a traction device for torque transmission.
Derartige Getriebe mit einstellbarer Ubersetzung sind seit längerem bekannt. Als Zugmittel werden entweder Keilriemen oder Stahlketten verwendet. Die Drehzahlverstellung erfolgt durch Zusammenschieben des einen Kegelscheibenpaares und entsprechendes Auseinanderrücken des anderen Kegelscheibenpaares, Eine Schwierigkeit beim Bau derartiger Getriebe liegt darin, daß al das Zugmittel unterschiedliche, sich zum Teil widersprechende Antorderungen gestellt werden müssen.Such transmissions with adjustable ratios have been around for a long time known. Either V-belts or steel chains are used as traction means. the The speed is adjusted by pushing one pair of conical disks together and moving the other pair of conical disks apart, a difficulty in the construction of such a transmission is that al the traction means different, Sometimes contradicting requests have to be made.
So muß das Zugmittel 1. zur Ubertragung des Drehmoments eine hohe Zugfestigkeit in der Längsrichtung aufweisen, 2. muß es in der Querrichtung eine hohe Druckfestigkeit aufweisen, da durch die Kegelscheiben eine Pressung ausgeübt wird, 3. muß die Reibung zwischen dem Zugmittel und den Kegelscheiben in tangentialer Richtung möglichst hoch, i n radialer Richtung jedoch möglichst niedrig sein.So the traction means 1. must have a high torque to transmit the torque Have tensile strength in the longitudinal direction, 2. it must have a tensile strength in the transverse direction have high compressive strength, since the conical disks exert a pressure 3. the friction between the traction mechanism and the conical pulleys must be tangential Direction as high as possible, but as low as possible in the radial direction.
Schließlich ist es aus verschiedenen Gründen vorteilhaft, wenn das Gewicht des Zugmittels möglichst niedrig ist.After all, there are several reasons why it is beneficial if that Weight of the traction device is as low as possible.
Aufgabe der vorliegenden Erfindung ist es, ein verstellbares Umschlingungsgetriebe anzugeben, bei dem zur Vermeidung der obengenannten Schwierigkeiten allein die Funktion der Drehmomentübertragung durch das Zugmittel erfüllt wird, während die übrigen Funktionen von anderen Bauteilen übernommen werden.The object of the present invention is to provide an adjustable belt transmission specify, in which to avoid the above-mentioned difficulties only the function the torque transmission is fulfilled by the traction mechanism, while the rest Functions are taken over by other components.
Diese Aufgabe wird durch die im Kennzeichen des Patentanspruchs 1 enthaltenen Merkmale gelöst.This task is achieved by the characterizing part of claim 1 contained features solved.
In der Zeichnung ist schematisch ein Ausführungsbeispiel der Erfindung dargestellt.An exemplary embodiment of the invention is shown schematically in the drawing shown.
Fig. 1 zeigt eine Seitenansicht der beiden Kegelscheibenpaare, Fig. 2 zeigt einen Schnitt durch ein Kegelscheibenpaar, Fig. 3 ist eine Draufsicht von Fig. 2.Fig. 1 shows a side view of the two pairs of conical pulleys, Fig. 2 shows a section through a pair of conical disks, FIG. 3 is a plan view of FIG Fig. 2.
In Fig. 1 ist jeweils die hintere Kegelscheibe 2,2a des Getriebes dargestellt. Die Kegelflächen 4 sind mit radial gerichteten Nuten 3 versehen. In die Nuten 3 tauchen die Enden von Tragstäben 7 ein, die parallel zur Welle 9 gerichtet sind. Über den Tragstäben 7 liegt ein Flachriemen 8.In Fig. 1 is the rear conical pulley 2.2a of the transmission shown. The conical surfaces 4 are provided with radially directed grooves 3. In the grooves 3 immerse the ends of support rods 7, which are directed parallel to the shaft 9 are. A flat belt 8 lies over the support rods 7.
Aus Fig. 2 geht die Lage eines Tragstabes 7 zwischen den Flegel scheiben 1,2 hervor. Durch Auseinanderschieben der Kegeischeiben 1,2 gleitet der Tragstab 7 in Richtung auf die Welle 9, wcdurch der wirksame Abrolldurchmesser für den Riemen 8 verringert wird.From Fig. 2, the position of a support rod 7 is between the flails 1.2. The support rod slides by pushing the taper disks 1, 2 apart 7 in the direction of the shaft 9, which is the effective unwinding diameter for the belt 8 is reduced.
Die Drehzahlverstellung erfolgt also in der bekannten Weise.The speed adjustment takes place in the known manner.
Damit die Tragstäbe 7 nicht durch die Fliehkraft nach außen getrieben werden, ist es notwendig, sie durch eine schwalbenschwanzähnliche Führung festzuhalten. Dies geht aus Fig. 3 hervor.So that the support rods 7 are not driven outward by centrifugal force it is necessary to hold them in place with a dovetail-like guide. This is evident from FIG. 3.
Die Nuten 3 haben einen schwalbenschwanzförmigen Querschnitt, in die die entsprechend geformten Enden 5,6 des Tragstabes 7 hinein-: passen, Um 1ein einwandfreies Gleiten der Tragstäbe 7 in den Nuten 3 zu ermöglichen, können die Stäbe aus einem Kunststoff mit selbstschmierenden Eigenschaften hergestellt sein. Als Kunststoff, der eine geringe Reibung gegenüber Metall haben muß, kann z.B.The grooves 3 have a dovetail-shaped cross-section into which the correspondingly shaped ends 5, 6 of the support rod 7 fit in, To 1 a flawless To allow sliding of the support rods 7 in the grooves 3, the rods can be made of one Plastic can be made with self-lubricating properties. As plastic, the must have a low friction against metal, e.g.
Polyamid oder PTFE verwendet werden.Polyamide or PTFE can be used.
Das Getriebe gemäß der Erfindung weist gegenüber den bekannten Ausführungen die folgenden Vorteile auf: 1. Durch die Verwendung eines leichten Flachriemens ist eine hohe Betriebsdrehzahl und damit eine hohe Leistung möglich, 2. es ist keine Schmierung notwendig, 3. die Geräuschentwicklung ist durch die geringe Masse des Flachriemens niedrig, 4. da der Riemen nur Zugkräfte übertragen muß, ist ein geringer Verschleiß zu erwarten, 5. die zur Verstellung der Kegelscheiben benötigte Kraft ist relativ gering, 6. die Baukosten des Getriebes sind daher niedrig.The transmission according to the invention has compared to the known designs the following advantages: 1. By using a lightweight flat belt a high operating speed and thus a high output is possible, 2. there is none Lubrication necessary, 3. the noise development is due to the low mass of the Flat belt low, 4. since the belt only has to transmit tensile forces, is a lower one Wear to be expected, 5. The force required to adjust the conical pulleys is relatively low, 6. the construction costs of the transmission are therefore low.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19782828524 DE2828524A1 (en) | 1978-06-29 | 1978-06-29 | Pulley for adjustable ratio belt drive - has radially sliding belt supports between axially movable discs which set pulley dia. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19782828524 DE2828524A1 (en) | 1978-06-29 | 1978-06-29 | Pulley for adjustable ratio belt drive - has radially sliding belt supports between axially movable discs which set pulley dia. |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2828524A1 true DE2828524A1 (en) | 1980-01-17 |
Family
ID=6043082
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19782828524 Withdrawn DE2828524A1 (en) | 1978-06-29 | 1978-06-29 | Pulley for adjustable ratio belt drive - has radially sliding belt supports between axially movable discs which set pulley dia. |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2828524A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0084160A1 (en) * | 1981-12-23 | 1983-07-27 | Kolbus GmbH & Co. KG | Chain drive |
US4516960A (en) * | 1983-06-20 | 1985-05-14 | Rahdener Maschinenfabrik August Kolbus | Variable speed chain drive |
US4594957A (en) * | 1983-12-10 | 1986-06-17 | Union Special Gmbh | Sewing machine belt feed with variable pitch drive pulley |
ES2924578A1 (en) * | 2021-03-25 | 2022-10-07 | Bernardez Jose Francisco Manso | Continuously variable transmission device (Machine-translation by Google Translate, not legally binding) |
-
1978
- 1978-06-29 DE DE19782828524 patent/DE2828524A1/en not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0084160A1 (en) * | 1981-12-23 | 1983-07-27 | Kolbus GmbH & Co. KG | Chain drive |
US4516960A (en) * | 1983-06-20 | 1985-05-14 | Rahdener Maschinenfabrik August Kolbus | Variable speed chain drive |
US4594957A (en) * | 1983-12-10 | 1986-06-17 | Union Special Gmbh | Sewing machine belt feed with variable pitch drive pulley |
ES2924578A1 (en) * | 2021-03-25 | 2022-10-07 | Bernardez Jose Francisco Manso | Continuously variable transmission device (Machine-translation by Google Translate, not legally binding) |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OB | Request for examination as to novelty | ||
8139 | Disposal/non-payment of the annual fee |