WO2022100781A1 - Chaîne à articulations et transmission à variation continue à poulie - Google Patents

Chaîne à articulations et transmission à variation continue à poulie Download PDF

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Publication number
WO2022100781A1
WO2022100781A1 PCT/DE2021/100832 DE2021100832W WO2022100781A1 WO 2022100781 A1 WO2022100781 A1 WO 2022100781A1 DE 2021100832 W DE2021100832 W DE 2021100832W WO 2022100781 A1 WO2022100781 A1 WO 2022100781A1
Authority
WO
WIPO (PCT)
Prior art keywords
link
chain
conical
twenty
plates
Prior art date
Application number
PCT/DE2021/100832
Other languages
German (de)
English (en)
Inventor
Carsten TRAUTMANN
Original Assignee
Schaeffler Technologies AG & Co. KG
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 Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Publication of WO2022100781A1 publication Critical patent/WO2022100781A1/fr

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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
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G5/00—V-belts, i.e. belts of tapered cross-section
    • F16G5/16—V-belts, i.e. belts of tapered cross-section consisting of several parts
    • F16G5/18—V-belts, i.e. belts of tapered cross-section consisting of several parts in the form of links

Definitions

  • the present invention relates to a plate link chain for a conical pulley belt transmission with infinitely variable transmission ratio, whose rocker joints connecting the individual chain links formed by plate sets with several link plates are designed as pairs of rocker pressure pieces with rolling surfaces supported on one another and pushed into recesses in the chain plates.
  • three chain links arranged adjacently in the direction of rotation of the link chain form a chain link group.
  • the link chain is formed by a large number of chain link groups placed directly next to one another in the direction of rotation, the link plates within a chain link group being arranged point-symmetrically to the center point of the chain link group over the entire width of the link chain.
  • the invention relates to a conical pulley belt transmission for a motor vehicle that can be steplessly adjusted in terms of transmission ratio.
  • a link chain is used as a looping means in a mechanically adjustable continuously variable transmission of a motor vehicle.
  • a mechanically adjustable continuously variable transmission known as a Continuously Variable Transmission, or CVT for short, allows the ratio to be continuously adjusted without any interruption in traction.
  • the link chain has chain links lined up next to each other, which are connected by pressure pieces. In the case of the chains currently on the market, the pressure pieces are axially secured using securing elements, for example short pieces of wire.
  • the link chain (or CVT link chain or CVT chain) has the following properties:
  • High torques can be transmitted with the CVT chain.
  • Thicker shackles which can be used optionally, on the outside of the strand even out the stress distribution.
  • the element is characterized by low internal friction losses due to the rolling of the rocker pressure pieces and thus guarantees good transmission efficiency.
  • the CVT chain is insensitive to track misalignment thanks to the optionally crowned end faces of the rocker pressure pads. In combination with optionally curved conical pulleys, the additional component of the toe offset that inevitably occurs during adjustment is reduced. Furthermore, the CVT chain is insensitive to pulley set deformation under load, angular errors and relative torsion between the fixed and movable conical pulley. It therefore does not require any ball guides for the axially movable conical pulleys.
  • the strand can be designed as a three-tab joint, thus enabling a short basic division.
  • a short chain link only the shackle of a plate is located between the adjacent joints.
  • EP 2 587 091 B1 discloses a link chain for a continuously variable transmission of a motor vehicle, wherein an element assembly of the link chain is formed by three consecutive chain elements, the arrangement pattern in the respective element assemblies being the same and the number of links in three link units contained in each element assembly is 9, 8 and 8, respectively.
  • the invention is based on the object of providing a link chain or a continuously variable transmission with a link chain, with this(these) being further optimized with regard to wear properties.
  • a reduced load on the link plates and the rocker pressure pieces should be achieved by the invention.
  • the individual rocker joints connecting the chain links formed by plate assemblies with several link plates are designed as pairs of rocker pressure pieces that are pushed into recesses in the link plates and have rolling surfaces that are supported on one another, with three chain links arranged adjacent to each other in the direction of rotation of the plate-link chain forming a chain link group.
  • the link chain is formed by a large number of chain link groups placed directly next to one another in the direction of rotation, the link plates within a chain link group being arranged point-symmetrically to the center point of the chain link group over the entire width of the link chain.
  • each chain link group of the link chain has a width of exactly thirty link plates of a predetermined link plate width.
  • the middle chain link of the chain link group with link plates occupies link plate positions on the first link plate position, on the sixth link plate position, on the eighth link plate position, on the eleventh link plate position, on the fourteenth link plate position, on the seventeenth link plate position, on the twentieth link plate position, on the twenty-third link plate position, on the twenty-fifth link plate position and on the thirtieth link plate position.
  • a first chain link arranged immediately adjacent to the middle chain link with link plates occupies link plate positions on the third link plate position, on the fourth link plate position, on the ninth link plate position, on the twelfth link plate position, on the fifteenth link plate position, on the eighteenth link plate position, on the twenty-first link plate position the twenty-fourth link plate position, the twenty-sixth link plate position, and the twenty-ninth link plate position.
  • a second chain link arranged immediately adjacent to the middle chain link occupies link plates on the link plate positions of the second link plate position, the fifth link plate position, the seventh link plate position, the tenth link plate position, the thirteenth link plate position, the sixteenth link plate position, the nineteenth link plate position, the twenty-second link plate position, the twenty-seventh - th link plate position and the twenty-eighth link plate position.
  • a link plate is an essential part of a link chain.
  • the link plate is a plate-like, elongated plate that has one or more through-openings transverse to its longitudinal extension and the plate surface for the passage and acceptance of so-called rocker pressure pieces (also referred to as pressure pieces or rocker pieces).
  • a cradle pressure piece is an essential part of the link chain.
  • the cradle pressure piece forms a so-called cradle joint together with the passage opening of the link plate through which it is guided. Due to the rocker joint design of the link chain, it is possible to realize small running circles on the cone pulleys and thus a high gear spread.
  • a part or a structural configuration is referred to as a securing element, which serves to ensure that the link plates cannot move laterally axially from the pressure pieces.
  • the pressure pieces are secured at least at one of their axial ends with a welded piece of wire or the like.
  • the link plates of a chain link for the plurality of chain link positions are formed by a single link plate, so that within a chain link group has link plates with a first link plate width and with a second link plate width that is different from the first link plate width.
  • each chain link group is formed by eighteen link plates with the smallest link plate width, whereby the effort in terms of assembly and storage of parts can be further optimized.
  • a continuously adjustable conical pulley belt transmission comprising a first pair of conical pulleys arranged on a first shaft and a second pair of conical pulleys arranged on a second shaft and a link chain arranged for torque transmission between the first pair of conical pulleys and the second pair of conical pulleys, wherein the Plate chain according to the invention, as described above, is formed.
  • the conical disks of the first pair of conical disks and the conical disks of the second pair of conical disks each have a conical disk angle that is greater than seven angular degrees and smaller than thirteen angular degrees, which is measured in particular between nine angular degrees and eleven point five angular degrees. This achieves an optimized interaction with the link chain constructed according to the invention.
  • the invention can also be further developed in such a way that the conical disks of the first pair of conical disks and the conical disks of the second pair of conical disks are made of case-hardened steel called CrMo or CoNiMo, which also allows for a low-wear interaction of the link chain constructed according to the invention with the conical disks of the transmission is beneficial.
  • the conical pulley belt drive it can be provided that the conical pulley belt drive with its pairs of conical pulleys is designed to be driven on the input side at a speed of approximately 4000 rpm to 6500 rpm and on the output side at a speed of approximately 12000 rpm. so that an operation is guaranteed within which a wear-reduced operation of the link chain is made possible.
  • the invention can also be implemented in an advantageous manner in that the driving conical disk pair is designed to transmit a torque of at least 150 Nm.
  • the cone pulley pair is optimized for a torque range up to a maximum of 460 Nm.
  • FIG. 1 shows a partial section of a link chain according to the prior art in a perspective view
  • FIG. 2 in the upper illustration, a conventional link chain in a detail in a plan view and in the lower illustration, a sectional view along a rocker pressure piece of an link chain, the structure and designations of the individual elements of a link chain are discussed on the basis of these schematic representations,
  • Figure 3 shows the basic structure of a chain link group in a schematic representation, in a plan view, with the upper representation showing three individual chain links and the lower representation showing a combination of these three chain links in the form of a chain link group consisting of the three chain links,
  • FIG. 4 shows a link chain constructed according to the invention in a partial section in a top view
  • FIG. 5 shows a schematic representation of a CVT transmission unit with a conical pulley belt transmission, integrated into the drive train of a hybrid vehicle.
  • FIG. 1 shows a link chain 1 according to the prior art for a mechanically adjustable continuously variable transmission for a motor vehicle.
  • This plate link chain 1 comprises a plurality of link plates 2, a plurality of rocker pressure pieces 5 and a plurality of securing elements 50, the rocker pressure pieces 5 for the articulated connection of the link plates 2 transverse to a longitudinal direction of the plate link chain 1 in recesses 20 of the link plates 2 to form rocker joints 4 are arranged, and the link plates 2 are arranged secured via the securing elements 50 against axial migration from the rocker pressure pieces 5 .
  • Figure 2 shows a conventional link chain 1 in the upper representation in a detail in a plan view and in the lower representation a sectional view along a rocker pressure piece 5 of a rocker joint 4 of a link chain 1, with the basis of these schematic representations of the structure and the designations of the individual elements of a link chain 1 should be clarified.
  • the upper illustration is easy to see how the individual chain links 3; 3- 1 , 3-2, 3-3 arranged one behind the other within the link chain 1 form individual chain link groups 30 and the chain link groups 30 of identical construction arranged one behind the other form the link chain 1 .
  • the arrangement of the individual link plates 2 at corresponding successive link plate positions KLP, from a first link plate position KLP1 to a last link plate position KLPn, over the width B of the link plate assembly can be seen.
  • the width B of the chain link assembly corresponds approximately to the inner distance between two securing elements 50 on the rocker pressure piece 5 shown.
  • the outer chain width b also shown, corresponds approximately to the axial length of a rocker pressure piece 5 - measured in its center axis.
  • Figure 3 shows the basic structure of a chain link group 30 in a schematic representation, in a plan view.
  • three isolated chain links 3; 3-1, 3-2, 3-3 and the lower illustration shows a combination of these three chain links 3-1, 3-2, 3-3 in the form of one of the three chain links 3-1, 3-2, 3 -3 existing chain link group 30 shown as part of a link chain 1.
  • the individual chain links 3 are via rocker joints 4 - formed by the two pressure pieces 5 of adjacent chain links 3, which penetrate the openings 20 within the link plates 2 of a chain link 3, linked or connected to one another.
  • a link chain 1 is composed of a large number of chain link groups 30 of the same structure which are arranged one behind the other and are connected to one another.
  • link chain 1 has a plurality of link links 2 over its width (link assembly width) B transversely to the longitudinal extension of the link chain 1 .
  • Each link plate 2 is assigned a link plate position KLP seen over the width B of the link chain 1 - represented here by the link plate positions from the first link plate position "one" KLP1 (below) to the last link plate position "n" KLPn (above).
  • FIG. 4 shows a link chain 1 constructed according to the invention in a partial section in a plan view.
  • the link chain 1 shown is designed for a conical pulley belt transmission 100 of a motor vehicle that can be steplessly adjusted in terms of transmission ratio.
  • the individual chain links 3 formed by plate assemblies with several link plates 2 connecting rocker joints 4 are designed as pairs of rocker pressure pieces 5 pushed into recesses 20 of the link plates 2 with rolling surfaces W supported on one another.
  • Each chain link group 3; 3-1, 3-2, 3-3 has a width B of exactly thirty link plates 2 of a predetermined link plate width b1, the middle chain link 3-2 of the chain link group 30 link plates 2 of the predetermined link plate width b1 on the link plate positions KLP one KLP1, six KLP6, eight KLP8, eleven KLP11, fourteen KLP14, seventeen KLP17, twenty KLP20, twenty three KLP23, twenty six twenty five KLP25 and thirty KLP30.
  • a first chain link 3-1 arranged adjacent to the middle chain link 3-2 has link plates 2 on the link plate positions KLP three KLP3, four KLP4, nine KLP9, twelve KLP12, fifteen KLP15, eighteen KLP18, twenty-one KLP21, twenty-four KLP24, twenty-six KLP26 and twenty-nine KLP29 on, while a second chain link 3-3 link plates 2 arranged adjacent to the middle chain link 3-2 on the link plate positions KLP two KLP2, five KLP5, seven KLP7, ten KLP10, thirteen KLP13, sixteen KLP16, nineteen KLP19, twenty-two KLP22, twenty-seven KLP27 and twenty-eight KLP28 occupied.
  • Each chain link group 3 is formed by thirty link plates 2 of the same link plate width b1.
  • FIG. 5 shows Figure shows a CVT transmission unit with a conical pulley belt transmission 100, integrated into the drive train of a hybrid vehicle in a schematic representation.
  • the conical pulley belt transmission 100 (also referred to as a variator) comprises a first pair of conical pulleys 300 with a than first conical disk 301 designed as a fixed disk and with an axially displaceable second conical disk 302 designed as a movable disk and a second conical disk set 500 with a first conical disk 501 designed as a fixed disk and a second conical disk 502 configured as a movable disk so as to be axially displaceable, as well as one of the two conical disk sets 300; 500 connecting means designed as a link chain 1.
  • the CVT transmission unit also includes an actuator unit AE, by means of which the displacement disks 302; 502 of first and second pulley sets 300; 500 are axially adjustable in such a way that a desired translation between the first set of conical disks 300 and the second set of conical disks 500 can be set.
  • the first set of conical pulleys 300 can be driven via an electric machine EM and/or an internal combustion engine BKM. Between the internal combustion engine BKM and the driven variator, the electric machine EM is integrated into the drive train via a separating clutch arranged on the internal combustion engine side and a separating clutch arranged on the variator side.
  • the second set of conical pulleys 500 is connected to a drive axle of the motor vehicle via a transmission unit.
  • the actuator unit AE is controlled via a control unit that is not shown.
  • FIG. 5 also shows that the conical disks 301, 302 of the first conical disk pair 300 and the conical disks 501, 502 of the second conical disk pair 500 each have a conical disk angle ⁇ 1, 2. This is advantageously greater than seven angular degrees and smaller than thirteen angular degrees and particularly preferably between nine angular degrees and eleven point five angular degrees.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmissions By Endless Flexible Members (AREA)

Abstract

L'invention concerne une chaîne à articulations (1). Les articulations oscillantes (4) de la chaîne, qui relient les maillons de chaîne individuels (3) formés par des ensembles de plaques comprenant une pluralité de plaques de liaison (2), se présentent sous la forme de paires de pièces de pression oscillantes (5) qui sont insérées dans des trous (20) dans les plaques de liaison (2) et ont des surfaces de roulement (W) mutuellement supportées. Selon l'invention, chaque groupe de maillons de chaîne (30) a une largeur (B) de 30 plaques de liaison exactement (2) ayant une largeur de plaque de liaison spécifiée (b1), le maillon de chaîne central (3-2) du groupe de maillons de chaîne (30) comprenant des plaques de liaison (2) dans les positions de plaque de liaison 1 (KLP1), 6 (KLP6), 8 (KLP8), 11 (KLP11), 14 (KLP14), 17 (KLP17), 20 (KLP20), 23 (KLP23), 25 (KLP25) et (KLP30), tandis qu'un premier maillon de chaîne (3-1) adjacent à la liaison de chaîne centrale (3-2) comprend des plaques de liaison (2) dans les positions des plaques de liaison 3 (KLP3), 4 (KLP4), 9 (KLP9), 12 (KLP12), 15 (KLP15), 18 (KLP18), 21 (KLP21), 24 (KLP24), 26 (KLP26) et 29 (KLP29) et qu'un second maillon de chaîne (3-3) adjacent à la liaison de chaîne centrale (3-2) comprend des plaques de liaison (2) dans des positions de plaque de liaison (KLP) 2 (KLP2), 5 (KLP5), 7 (KLP7), 10 (KLP10), 13 (KLP13), 16 (KLP16), 19 (KLP19), 22 (KLP22), 27 (KLP27) et 28 (KLP28).
PCT/DE2021/100832 2020-11-12 2021-10-15 Chaîne à articulations et transmission à variation continue à poulie WO2022100781A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020129936.2 2020-11-12
DE102020129936.2A DE102020129936B4 (de) 2020-11-12 2020-11-12 Laschenkette und Kegelscheibenumschlingungsgetriebe

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WO2022100781A1 true WO2022100781A1 (fr) 2022-05-19

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PCT/DE2021/100832 WO2022100781A1 (fr) 2020-11-12 2021-10-15 Chaîne à articulations et transmission à variation continue à poulie

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020077205A1 (en) * 2000-12-18 2002-06-20 Turner Douglas J. Link chain for a continuously variable transmission
US20050119081A1 (en) * 2001-12-14 2005-06-02 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Transmission with belt elements, especially for the transmision of force between two pairs of conical disks of the transmission
DE102015201329A1 (de) * 2015-01-27 2016-07-28 Schaeffler Technologies AG & Co. KG Umschlingungsmittel
EP2587091B1 (fr) 2011-10-31 2016-12-07 Jtekt Corporation Chaîne pour transmission variable en continu
WO2017032372A1 (fr) * 2015-08-24 2017-03-02 Schaeffler Technologies AG & Co. KG Chaîne articulée suivant un assemblage à trois plaquettes
DE102018113750A1 (de) * 2018-06-08 2019-12-12 Schaeffler Technologies AG & Co. KG Laschenkette
DE102018121505A1 (de) * 2018-09-04 2020-03-05 Schaeffler Technologies AG & Co. KG Umschlingungsmittel und CVT-Getriebe mit selbigem

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020077205A1 (en) * 2000-12-18 2002-06-20 Turner Douglas J. Link chain for a continuously variable transmission
US20050119081A1 (en) * 2001-12-14 2005-06-02 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Transmission with belt elements, especially for the transmision of force between two pairs of conical disks of the transmission
EP2587091B1 (fr) 2011-10-31 2016-12-07 Jtekt Corporation Chaîne pour transmission variable en continu
DE102015201329A1 (de) * 2015-01-27 2016-07-28 Schaeffler Technologies AG & Co. KG Umschlingungsmittel
WO2017032372A1 (fr) * 2015-08-24 2017-03-02 Schaeffler Technologies AG & Co. KG Chaîne articulée suivant un assemblage à trois plaquettes
DE102018113750A1 (de) * 2018-06-08 2019-12-12 Schaeffler Technologies AG & Co. KG Laschenkette
DE102018121505A1 (de) * 2018-09-04 2020-03-05 Schaeffler Technologies AG & Co. KG Umschlingungsmittel und CVT-Getriebe mit selbigem

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DE102020129936A1 (de) 2022-05-12
DE102020129936B4 (de) 2022-10-13

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