NL1031825C2 - Continuously variable transmission, has endless chain with links connected together by paired hinge pins extending around two pairs of cone pulleys - Google Patents
Continuously variable transmission, has endless chain with links connected together by paired hinge pins extending around two pairs of cone pulleys Download PDFInfo
- Publication number
- NL1031825C2 NL1031825C2 NL1031825A NL1031825A NL1031825C2 NL 1031825 C2 NL1031825 C2 NL 1031825C2 NL 1031825 A NL1031825 A NL 1031825A NL 1031825 A NL1031825 A NL 1031825A NL 1031825 C2 NL1031825 C2 NL 1031825C2
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- Netherlands
- Prior art keywords
- continuously variable
- transmission
- hinge pins
- pair
- variable transmission
- Prior art date
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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
- F16H9/12—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 built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members
- F16H9/16—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 built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members using two pulleys, both built-up out of adjustable conical parts
- F16H9/18—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 built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members using two pulleys, both built-up out of adjustable conical parts only one flange of each pulley being adjustable
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- 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
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/32—Friction members
- F16H55/52—Pulleys or friction discs of adjustable construction
- F16H55/56—Pulleys or friction discs of adjustable construction of which the bearing parts are relatively axially adjustable
-
- 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
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/66—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings
- F16H61/662—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members
- F16H2061/66295—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members characterised by means for controlling the geometrical interrelationship of pulleys and the endless flexible member, e.g. belt alignment or position of the resulting axial pulley force in the plane perpendicular to the pulley axis
-
- 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
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/66—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings
- F16H61/662—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members
- F16H61/66272—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for continuously variable gearings with endless flexible members characterised by means for controlling the torque transmitting capability of the gearing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmissions By Endless Flexible Members (AREA)
Abstract
Description
Titel: Continu variabele transmissieTitle: Continuously variable transmission
De uitvinding heeft betrekking op een continu variabele transmissie omvattende een met de ingaande transmissieas te koppelen eerste paar instelbare kegelschijven, een loskoppelbaar met de uitgaande transmissieas verbonden tweede 5 paar instelbare kegelschijven en een over deze kegelschijven verlopend eindloos transmissieorgaan, waarbij de door de oppervlakken van de kegelschijven ingesloten hoek kleiner is dan 22 graden.The invention relates to a continuously variable transmission comprising a first pair of adjustable cone disks to be coupled to the input transmission shaft, a second pair of adjustable cone disks detachably connected to the outgoing transmission axis and an endless transmission member extending over these cone disks, the endless transmission member running through the surfaces of the cone discs enclosed angle is less than 22 degrees.
Een dergelijke transmissie is op zich bekend uit 10 EP 0 896 171 A2 respectievelijk EP 0 798 492 Al. Deze beide publicaties beschrijven een continu variabele transmissie waarin het daarin toegepaste eindloze transmissieorgaan wordt gevormd door een metalen "duwband" van de soort die in de praktijk wordt aangeduid als de "VDT duwband".Such a transmission is known per se from EP 0 896 171 A2 and EP 0 798 492 A1, respectively. Both of these publications describe a continuously variable transmission in which the endless transmission member used therein is formed by a metal "push belt" of the type referred to in practice as the "VDT push belt".
15 Bij een dergelijke continu variabele transmissie treedt in de praktijk het bezwaar op dat bij kleine(re) waarden van de door de oppervlakken van de kegelschijven ingesloten hoek, in het bijzonder in het bereik van 10 tot 16 graden, de tussen twee poelieschijven ingesloten dwarselementen van de duwband 20 bij het vrijkomen van deze poelieschijven niet direct van het gekromde part van de daardoor beschreven baan overgaan in het rechte part van deze baan doch nog enige tijd tussen de schijven ingeklemd blijven en dus over een korte afstand de gekromde baan voortzetten. De overgang van het gekromde part 25 van de baan naar het rechte part geschiedt aldus niet geleidelijk doch abrupt en dit is de oorzaak van een lager rendement en een merkbare verhoging van het niveau van het door de transmissie opgewekte geluid.In the case of such a continuously variable transmission, in practice the drawback arises that in the case of small (er) values of the angle enclosed by the surfaces of the conical discs, in particular in the range of 10 to 16 degrees, the transverse elements enclosed between two pulley discs of the push belt 20 on release of these pulley sheaves do not immediately change from the curved part of the path described thereby to the straight part of this path but remain wedged between the sheaves for some time and thus continue the curved path over a short distance. The transition from the curved part 25 of the path to the straight part thus takes place not gradually but abruptly and this is the cause of a lower efficiency and a noticeable increase in the level of the noise generated by the transmission.
De uitvinding beoogt een continu variabele transmissie 30 van de in de aanhef genoemde soort te verschaffen welke dit bezwaar mist. Volgens de uitvinding wordt hiertoe voorgesteld dat het eindloos transmissieorgaan wordt gevormd door een transmissieketting met paarsgewijs met elkaar gecombineerde langwerpige scharnierpennen en door deze scharnierpennen 031825 2 onderling gekoppelde schalmen, waarbij van elk paar scharnierelementen steeds één scharnierelement koppeloverbrengend samenwerkt met de oppervlakken van de kegelschij ven.The invention has for its object to provide a continuously variable transmission 30 of the type mentioned in the preamble which does not have this drawback. To this end, according to the invention, it is proposed that the endless transmission member be formed by a transmission chain with elongated hinge pins paired in pairs and mutually coupled links by these hinge pins 031825 2, one hinge element of each pair of hinge elements cooperating in a coupling manner with the surfaces of the conical discs.
5 Opgemerkt wordt dat een dergelijke transmissieketting op zich bekend is uit EP 0 741 255 Al (GCI).It is noted that such a transmission chain is known per se from EP 0 741 255 A1 (GCI).
Bij voorkeur ligt de in het voorgaande bedoelde ingesloten in het bereik van 10 tot 16 graden en is bij voorkeur gelijk aan 12 graden.Preferably, the aforementioned enclosed is in the range of 10 to 16 degrees and is preferably equal to 12 degrees.
10 Gebleken is dat bij toepassing van de volgens de uitvinding voorgestelde maatregelen de voordelen van het verkleinen van de door de kegelschijven ingesloten kegelhoek zoals hierboven voorgesteld, te weten: lagere trekkrachten in het transmissieorgaan, kleinere axiale verplaatsing van de 15 poelieschijven en lagere knijpkrachten op deze poelieschijven, behouden blijven.It has been found that when applying the measures proposed according to the invention the advantages of reducing the cone angle enclosed by the cone discs as proposed above, namely: lower tensile forces in the transmission member, smaller axial displacement of the pulley discs and lower pinching forces on these pulley sheaves.
Het zal duidelijk zijn dat de voorgestelde maatregel kan worden toegepast bij een symmetrische CVT - waarbij dus de respectievelijke tophoeken van de kegelschijven onderling gelijk 20 zijn - alsook bij een asymmetriche CVT, waar deze hoeken van elkaar verschillen.It will be clear that the proposed measure can be applied with a symmetrical CVT - so that the respective top angles of the cone discs are mutually equal - as well as with an asymmetrical CVT, where these angles differ from each other.
De uitvinding wordt toegelicht aan de hand van de tekening. Hierin toont: fig. 1 zeer schematisch een continu variabele transmissie 25 volgens de uitvinding; fig. 2 een schema van de tijdens bedrijf in de drijfriem van een dergelijke transmissie optredende krachten.The invention is explained with reference to the drawing. Herein: Fig. 1 shows very diagrammatically a continuously variable transmission according to the invention; Fig. 2 shows a diagram of the forces occurring during operation in the drive belt of such a transmission.
Fig. 1 toont zeer schematisch hoe een aandrijvende motor 1 tijdens bedrijf via bijvoorbeeld een vloeistofkoppeling 2 is 30 gekoppeld met de ingaande as 3 van een continu variabele transmissie (CVT) 4, waarvan de uitgaande as 6 via een aan/uit koppeling 8 en de uitgaande as 10 daarvan is gekoppeld met een drijfwerk 12 waarin de rotatiebeweging van deze as 10 kan worden omgekeerd; de uitgaande as 14 van dit drijfwerk 12 is gekoppeld 35 met een differentieel 16 waarvan de uitgaande assen 18a, 18b, de wielen 20a, 20b aandrijven. Het zal de vakman duidelijk zijn dat in de praktijk de koppeling 8, de assen 10, 14, het drijfwerk 12 en de differentieel 16 gewoonlijk tot één constructieve eenheid zullen zijn gecombineerd. De koppeling 2 zou kunnen vervallen 3 wanneer de koppeling 8 een vloeistofkoppeling of een wegrij koppeling is.FIG. 1 shows very diagrammatically how a driving motor 1 is coupled during operation via, for example, a fluid coupling 2, to the input shaft 3 of a continuously variable transmission (CVT) 4, the output shaft 6 of which via an on / off coupling 8 and the output shaft 10 thereof is coupled to a gear 12 in which the rotational movement of this shaft 10 can be reversed; the output shaft 14 of this gear 12 is coupled to a differential 16, the output shafts 18a, 18b of which drive the wheels 20a, 20b. It will be apparent to those skilled in the art that in practice the coupling 8, the shafts 10, 14, the gear 12 and the differential 16 will usually be combined into one structural unit. The coupling 2 could be omitted 3 if the coupling 8 is a fluid coupling or a drifting coupling.
De CVT 4 omvat een eerste paar poelieschijven 22a, 22b aangedreven door de ingaande as 2 en van dit paar kan de 5 poelieschijf 22a door middel van een geschikt bestuurde aandrijving 24 voor het verkleinen respectievelijk vergroten van de onderlinge afstand van de poelieschijven naar de poelieschijf 22b toe respectievelijk af worden bewogen. Op soortgelijke wijze kan van het tweede paar poelieschijven, 10 aangegeven met 26a, 26b de poelieschijf 26a onder invloed van de aandrijving 28 naar de poelieschijf 26b worden toe respectievelijk af bewogen. De beide poelieschijfparen 22a, 22b; 26a, 26b zijn onderling gekoppeld door een daaromheen geslagen eindloos transmissieorgaan 30, dat volgens de uitvinding wordt 15 gevormd door een transmissieketting zoals op zich bekend uit de reeds genoemde publicatie EP 0 741 255 B2.The CVT 4 comprises a first pair of pulley sheaves 22a, 22b driven by the input shaft 2 and of this pair the pulley sheave 22a can be driven by means of a suitably controlled drive 24 for reducing or increasing the mutual distance from the pulley sheaves to the pulley sheave 22b be moved to and fro. Similarly, from the second pair of pulley sheaves, indicated by 26a, 26b, the pulley sheave 26a can be moved towards and away from the pulley sheave 26b under the influence of the drive 28. The two pulley sheave pairs 22a, 22b; 26a, 26b are mutually coupled by an endless transmission member 30 wrapped around it, which according to the invention is formed by a transmission chain as is known per se from the aforementioned publication EP 0 741 255 B2.
Een continu variabele transmissie waarbij de kegelschijven symmetrisch zijn ten opzichte van het langssymmetrievlak 42 is uit talloze publicaties, en eveneens uit de praktijk bekend. Bij 20 deze bekende transmissies is de kegelhoek β van elk der kegelschijven zoals vergroot getoond in het omcirkelde gedeelte in fig. IA, welke hoek β is de hoek die het kegelvlak 40 insluit met het langssymmetrievlak 42 van de kegelschijven, gelijk aan 11 graden, zodat de totale door de kegelschijfoppervlakken 25 ingesloten hoek gelijk is aan 22 graden.A continuously variable transmission in which the cone discs are symmetrical with respect to the longitudinal plane of symmetry 42 is known from numerous publications and also from practice. In these known transmissions, the cone angle β of each of the cone disks is shown as enlarged in the circled portion in Fig. 1A, which angle β is the angle that the cone surface 40 encloses with the longitudinal plane of symmetry 42 of the cone disks, equal to 11 degrees, so that the total angle enclosed by the conical disk surfaces 25 is 22 degrees.
Fig. 2 toont schematisch een zijaanzicht van een kegelschijf 44 waarover een eindloos transmissieorgaan 46 loopt dat schematisch is weergegeven met een streeplijn. Dit transmissieorgaan is hier een ketting zoals beschreven in 30 EP 0 741 255 die in een situatie zoals getoond in fig. 2 over het loopvlak van de poelie 44 bij benadering een halve cirkel beschrijft waarvan de loopstraal de waarde R heeft. In het trekkend part 46a van dit transmissieorgaan 46 treedt dan een trekkracht Fi op terwijl in het getrokken part 46b een 35 trekkracht F2 optreedt. Het door het transmissieorgaan 46 op de poelie 44 overgedragen koppel T wordt dan gegeven door: T = (Fj. - F2)R, 4 terwijl de verhouding tussen Fi en F2 wordt gegeven door: na F, _ sinfl — c f2 5 Daarin is: μ: de heersende wrijvingscoëfficiënt a: de omspannen boog, in de praktijk vrijwel altijd gelijk aan ca. 2,7 rad., enFIG. 2 schematically shows a side view of a conical disc 44 over which runs an endless transmission member 46 which is shown schematically with a broken line. This transmission member is here a chain as described in EP 0 741 255 which, in a situation as shown in Fig. 2, describes over the running surface of the pulley 44 approximately a semicircle whose running radius has the value R. A pulling force F1 then occurs in the pulling part 46a of this transmission member 46, while a pulling force F2 occurs in the pulling part 46b. The torque T transmitted by the transmission member 46 to the pulley 44 is then given by: T = (F 1 - F 2) R 4 while the ratio between F 1 and F 2 is given by: after F 1 : μ: the prevailing coefficient of friction a: the arched arc, in practice almost always equal to about 2.7 rad., and
β: de in het bovenstaande aan de hand van fig. IAβ: the above with reference to Fig. IA
10 toegelichte kegelhoek.10 explained cone angle.
Het zal duidelijk zijn dat reeds een kleine afname van β en daarmee van sin β onder gelijkblijvende omstandigheden een zeer grote invloed heeft op de verhouding F±/F2 en daarmee ook 15 op het, met (Fi -F2) direct evenredige over te brengen koppel.It will be clear that already a small decrease of β and hence of sin β under the same circumstances has a very large influence on the ratio F ± / F2 and thus also on the torque to be transmitted directly proportional to (F 1 -F 2) .
0 3 1 8250 3 1 825
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1031825A NL1031825C2 (en) | 2006-05-16 | 2006-05-16 | Continuously variable transmission, has endless chain with links connected together by paired hinge pins extending around two pairs of cone pulleys |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1031825A NL1031825C2 (en) | 2006-05-16 | 2006-05-16 | Continuously variable transmission, has endless chain with links connected together by paired hinge pins extending around two pairs of cone pulleys |
| NL1031825 | 2006-05-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL1031825C2 true NL1031825C2 (en) | 2007-11-20 |
Family
ID=37421141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL1031825A NL1031825C2 (en) | 2006-05-16 | 2006-05-16 | Continuously variable transmission, has endless chain with links connected together by paired hinge pins extending around two pairs of cone pulleys |
Country Status (1)
| Country | Link |
|---|---|
| NL (1) | NL1031825C2 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0741255A1 (en) * | 1995-05-03 | 1996-11-06 | Gear Chain Industrial B.V. | Transmission chain for a cone pulley transmission |
| EP0798492A1 (en) * | 1996-03-27 | 1997-10-01 | Honda Giken Kogyo Kabushiki Kaisha | Metal v-belt type continuously variable transmission |
| EP0896171A2 (en) * | 1997-08-04 | 1999-02-10 | Honda Giken Kogyo Kabushiki Kaisha | Metal V-belt type continuously variable transmission |
| EP1304501A2 (en) * | 2001-10-19 | 2003-04-23 | Bando Chemical Industries, Ltd. | Belt continuously variable transmission |
| EP1441151A2 (en) * | 2003-01-23 | 2004-07-28 | HONDA MOTOR CO., Ltd. | Belt type continuously variable transmission |
-
2006
- 2006-05-16 NL NL1031825A patent/NL1031825C2/en not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0741255A1 (en) * | 1995-05-03 | 1996-11-06 | Gear Chain Industrial B.V. | Transmission chain for a cone pulley transmission |
| EP0741255B2 (en) * | 1995-05-03 | 2000-05-24 | Gear Chain Industrial B.V. | Transmission chain for a cone pulley transmission |
| EP0798492A1 (en) * | 1996-03-27 | 1997-10-01 | Honda Giken Kogyo Kabushiki Kaisha | Metal v-belt type continuously variable transmission |
| EP0896171A2 (en) * | 1997-08-04 | 1999-02-10 | Honda Giken Kogyo Kabushiki Kaisha | Metal V-belt type continuously variable transmission |
| EP1304501A2 (en) * | 2001-10-19 | 2003-04-23 | Bando Chemical Industries, Ltd. | Belt continuously variable transmission |
| EP1441151A2 (en) * | 2003-01-23 | 2004-07-28 | HONDA MOTOR CO., Ltd. | Belt type continuously variable transmission |
Non-Patent Citations (1)
| Title |
|---|
| ROEPER H: "ANFORDERUNGEN AN DIE DRUCKOELVERORGUNGSEINHEIT HYDRAULISCH GESTEUERTER CVT-GETRIEBE", ANTRIEBSTECHNIK, VEREINIGTE FACHVERLAGE, MAINZ, DE, vol. 26, no. 8, 1987, pages 41 - 47, XP002049540, ISSN: 0722-8546 * |
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Effective date: 20160601 |