EP3959456A1 - Druckstück mit optimiertem dickenverhältnis sowie laschenkette mit druckstück - Google Patents
Druckstück mit optimiertem dickenverhältnis sowie laschenkette mit druckstückInfo
- Publication number
- EP3959456A1 EP3959456A1 EP20716696.8A EP20716696A EP3959456A1 EP 3959456 A1 EP3959456 A1 EP 3959456A1 EP 20716696 A EP20716696 A EP 20716696A EP 3959456 A1 EP3959456 A1 EP 3959456A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure piece
- thickness
- pressure
- height direction
- link chain
- 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- Withdrawn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
- 238000005096 rolling process Methods 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 9
- 238000009434 installation Methods 0.000 description 4
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
-
- 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
- F16H9/24—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using chains or toothed belts, belts in the form of links; Chains or belts specially adapted to such gearing
Definitions
- the invention relates to a pressure piece for the articulated connection of link plates of a CVT link plate chain for a drive train of a motor vehicle, in particular for a continuously variable transmission (CVT transmission).
- the invention also relates to a chain for a drive train of a motor vehicle with a plurality of La's which are hingedly connected via pressure pieces, preferably via several pressure pieces that are arranged in pairs and which engage in openings in the tabs.
- EP 1 862 700 A1 discloses a link chain for a vehicle drive in particular, with a plurality of link plates articulated to one another via pressure pieces, the pressure pieces extending transversely to the longitudinal direction of the plate chain and being arranged in openings in the chain plates and on the pressure pieces and the link plates are arranged with respective curved contact surfaces, along which the pressure pieces and link plates for force transmission rest against one another in contact surfaces and curved rolling surfaces are arranged on the pressure pieces, ent long of which the pressure pieces roll off one another for force transmission and the pressure pieces end faces for frictional contact with conical pulleys of a conical pulley belt transmission, characterized in that the end faces are configured in such a way that a contact between the pressure pieces and the conical disks in the pressure piece height direction in the upper area of the St takes place in surfaces.
- a (cradle) pressure piece and a link chain with such a pressure piece are to be provided in which the pressure piece is designed in such a way that kinking kinematics is enabled and at the same time a particularly low load on the pressure piece is achieved.
- an optimal cross-sectional ratio, in particular thickness ratio should be provided for the upper and lower cross-sectional halves of the pressure piece in order to achieve the lowest possible utilization of this and to keep the installation space of the lateral strap bracket sufficiently large.
- a thickness ratio of the pressure piece between a lower thickness of a section of the pressure piece that is lower in a height direction and an upper thickness of a section of the pressure piece that is upper in the height direction, the lower thickness and the upper thickness respectively are measured at a predetermined distance from the center of the pressure piece seen in the height direction and perpendicular to the height direction, greater than 1/1, 09 is.
- the upper thickness is a maximum of 1.09 times as large as the lower thickness.
- the pressure piece has a rolling surface, the rolling surface being symmetrical to the center viewed in the vertical direction. That is, the height and the thickness of the pressure piece is measured when the pressure piece is aligned so that an upper angle between the rolling surface of the upper section and a contour line that runs through the center seen in the height direction and parallel to the height direction is aligned, is included, corresponds to a lower angle which is closed between the rolling surface of the lower portion and the contour line. That is, when measuring the thickness and the height, the pressure piece is oriented such that the rolling surface extends from the center viewed in the height direction at the same angle to the height direction in the upward direction and in the downward direction.
- the thickness ratio can be less than or equal to 1/1.0, preferably less than 1/1.05. That is, the depth of the lower portion is less than the depth of the upper portion. As a result, sufficient installation space is made available to enable the link chain to kink even with a small running radius.
- the predetermined distance can be less than 40% of the total height of the pressure piece. Since the thickness ratio is particularly in an area near the center, i. In an area that is away from a contact area between the tab and the pressure piece, it is important not to measure the thicknesses in the outer areas.
- the predetermined distance is 20% to 35% of the total height of the pressure piece. It has been shown that the thickness ratio is decisive in this area in particular. As a particularly preferred embodiment, the thickness ratio, which is at the distance of about 30% ⁇ 5% of the total height, more preferably exactly 30% of the total height, between 1 and 1/1.09, in particular 1/1, 071, lies. It is also useful if a cross section of the pressure piece is constant in a longitudinal extension of the pressure piece. As a result, the optimal thickness ratio is held before geous enough over the entire width of the link chain in which the pressure piece is set.
- the object of the invention is also achieved by a link chain for a drive train of a motor vehicle, in particular for a continuously variable transmission.
- the link chain has a large number of links which are articulated to one another via at least one pressure piece which engages in openings in the link plates.
- the invention relates to a pressure piece with an optimal cross-sectional ratio, in particular thickness ratio, between the upper and the lower half of the pressure piece in order to achieve the lowest possible load on the pressure piece.
- the center of the pressure piece seen in the height direction which can also be referred to as a geometric center in the height direction, is determined based on the total height of the pressure piece when the pressure piece is in a symmetrical position with respect to the rolling side.
- the result is an optimal thickness ratio of the lower thickness to the upper thickness of 1: 1.0-1.09.
- FIG. 1 shows a section of an exemplary general embodiment of a
- Fig. 2 is a schematic cross-sectional view of a pressure piece of
- the link chain 1 shows a section of an exemplary general embodiment of a link chain 1 for a drive train of a motor vehicle.
- the link chain 1 is used in particular for a continuously variable transmission (CVT transmission).
- CVT transmission continuously variable transmission
- the link chain 1 serves as a traction device of a variator in order to connect two pairs of conical pulleys of the variator to one another.
- the link chain 1 has a multiplicity of link plates 2, which are referred to below as link plates 2.
- the plates 2 are arranged parallel to a running direction of the plate link chain 1.
- the tabs 2 are arranged side by side in several rows transverse to the direction of travel of the La chain 1.
- the tabs 2 are articulated to one another ver via rocker pressure pieces 3, which are hereinafter referred to as pressure pieces 3.
- the pressure pieces 3 engage in openings 4 of the tabs 2 or sougrei fen the openings 4 to connect them together.
- the pressure pieces 3 extend transversely to the direction of travel of the link chain 1.
- the pressure pieces 3 extend over the entire width of the link chain 1.
- the pressure pieces 3 connect adjacent straps 2 to one another transversely to the running direction.
- the tabs 2 of one row are offset in the running direction of the tab chain 1 to the tabs 2 of another row, so that the tabs 2 are connected to one another by the pressure pieces 3 in the running direction of the tab chain 1.
- the pressure pieces 3 are each arranged in pairs as a pair of pressure pieces 5.
- Each tab 2 is connected by a first pair of pressure pieces to a tab 2 located in front of it in the running direction (or to several tabs 2 located in front of it in the running direction).
- Each tab 2 is connected by a second pair of pressure pieces with a tab 2 located behind it in the running direction (or with several tabs 2 located behind it in the running direction).
- FIG. 2 shows a schematic representation of the pressure piece 3.
- the design of the pressure piece 3 according to the invention is described in more detail with reference to FIG.
- a thickness ratio of the pressure piece 3 between a lower thickness 7 of a section 8 of the pressure piece 3 that is lower in a height direction and an upper thickness 9 of a section 10 of the pressure piece 3 that is upper in the height direction is greater than 1/1, 09.
- the thicknesses 7, 9 are each at a predetermined distance 11 from the center 12 of the pressure piece 3 viewed in the height direction and perpendicular to the height direction, i.e. in a thickness direction of the pressure piece 3, measure ge.
- the height direction corresponds to the direction in which the pressure piece 3 has a ma ximal extent. The maximum extent is measured in particular in a symmetrical position of the pressure piece 3, which will be explained in more detail later.
- the thickness direction of the pressure piece 3 is perpendicular to the height direction. This means that the center 12 seen in the height direction is at half a height 13 of a total extension 14 in the height direction / total height 14.
- the height direction runs parallel to a height line 15, which is shown in FIG. 2.
- the thickness direction runs parallel to the line of the center 12, seen in the height direction, which is shown in FIG.
- the upper thickness 9 is a maximum of 1.09 times as large as the lower thickness 7.
- the thickness ratio between the lower thickness 7 and the upper thickness 9 is less than or equal to 1/1. That is, the lower thickness 7 is smaller than the upper thickness 9.
- the thickness ratio (lower depth / upper depth) is consequently between 1/1.09 ( ⁇ 0.9174) and 1. Since the extension in the thickness direction of the pressure piece 3 changes greatly over the height direction, the lower thickness becomes 7 and the upper thickness 9 each measured at the same distance from the center 12 seen in the height direction.
- the thicknesses 7, 9 are measured in particular in an area in which the thickness 7, 9 is approximately constant, ie in an area remote from a contact area between the pressure piece 3 and the tab 2, in the direction of the center.
- the predetermined distance 1 1 is less than 40% of the total height 14 of the pressure piece 3.
- the predetermined distance 1 1 is 20% to 35% of the total height of the pressure piece 3.
- the predetermined distance is about 30% ⁇ 5% , preferably exactly 30%, of the total height 14.
- the thickness ratio is less than 1/1.05. More precisely, the thickness ratio in the predetermined distance 1 1 from 30% of the total height 14 is 1/1, 071. This has proven to be particularly suitable for loading the pressure piece 3.
- a cross section of the pressure piece 3 is shown.
- the cross section of the pressure piece 3 is in a longitudinal extension of the pressure piece 3, i. perpendicular to the cross section, constant.
- the pressure piece 3 has a rolling surface 16 with which it rests on another pressure piece 3, which forms a pair of pressure pieces 5 (see FIG. 1) with the pressure piece.
- an upper angle ⁇ which is included between the rolling surface 16 of the upper section 10 and the contour line 15, which runs through the center seen in the height direction and is aligned parallel to the height direction
- a lower angle ⁇ which is between the rolling surface 16 of the lower portion 8 and the contour line 15 is included.
- the pressure piece 3 is shown in a symmetrical position in which the upper angle ⁇ corresponds to the lower angle ß ent. This means that the total height 14, the lower depth 7 and / or the upper depth 9 of the pressure piece 3 are measured in the symmetrical position in which the rolling surface 16 is aligned symmetrically to the center 12 viewed in the height direction.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmissions By Endless Flexible Members (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019110493.9A DE102019110493A1 (de) | 2019-04-23 | 2019-04-23 | Druckstück mit optimiertem Dickenverhältnis sowie Laschenkette mit Druckstück |
| PCT/DE2020/100228 WO2020216391A1 (de) | 2019-04-23 | 2020-03-23 | Druckstück mit optimiertem dickenverhältnis sowie laschenkette mit druckstück |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3959456A1 true EP3959456A1 (de) | 2022-03-02 |
Family
ID=70165763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20716696.8A Withdrawn EP3959456A1 (de) | 2019-04-23 | 2020-03-23 | Druckstück mit optimiertem dickenverhältnis sowie laschenkette mit druckstück |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20220170529A1 (de) |
| EP (1) | EP3959456A1 (de) |
| CN (1) | CN113544405A (de) |
| DE (1) | DE102019110493A1 (de) |
| WO (1) | WO2020216391A1 (de) |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5562559A (en) * | 1995-04-13 | 1996-10-08 | Borg-Warner Automotive, Inc. | Rocker joint chain with crescent shaped aperture |
| JP3091451B1 (ja) * | 1999-06-14 | 2000-09-25 | 株式会社椿本チエイン | ロッカージョイントピン型サイレントチェーン |
| DE10047979B4 (de) * | 1999-10-13 | 2013-05-16 | Schaeffler Technologies AG & Co. KG | Kette |
| US7658690B2 (en) * | 2004-12-02 | 2010-02-09 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Plate-link chain, particularly for a motor vehicle drive system |
| CN101283196B (zh) * | 2005-10-06 | 2011-09-21 | 卢克摩擦片和离合器两合公司 | 链接片、包含该链接片的链以及通过该链构成的链传动装置和装备有该链传动装置的车辆 |
| EP1862700A3 (de) * | 2006-06-02 | 2009-12-02 | LuK Lamellen und Kupplungsbau Beteiligungs KG | Laschenkette, Druckstück dafür und damit versehenes Kegelscheibenumschlingungsgetriebe |
| JP4997537B2 (ja) * | 2007-10-22 | 2012-08-08 | 株式会社ジェイテクト | 動力伝達チェーンおよび動力伝達装置 |
| US20170074352A1 (en) * | 2014-05-07 | 2017-03-16 | Schaeffler Technologies AG & Co. KG | Rocker joint for a plate link chain |
| JP6298736B2 (ja) * | 2014-08-08 | 2018-03-20 | 株式会社豊田中央研究所 | 無段変速機及び無段変速機を設計する方法 |
| DE102016204024B4 (de) * | 2016-03-11 | 2018-02-01 | Schaeffler Technologies AG & Co. KG | Laschenkette |
| DE102016215952A1 (de) * | 2016-08-25 | 2018-03-01 | Schaeffler Technologies AG & Co. KG | Umschlingungsmittel und Getriebe mit Umschlingungsmittel |
| DE102017102210A1 (de) * | 2016-09-23 | 2018-03-29 | Schaeffler Technologies AG & Co. KG | Lasche für ein als Laschenkette ausgebildetes Umschlingungsmittel, entsprechendes Umschlingungsmittel und Getriebe mit Umschlingungsmittel |
| DE102016223111A1 (de) * | 2016-11-23 | 2018-05-24 | Schaeffler Technologies AG & Co. KG | Wiegegelenkkette |
| DE102017113959B4 (de) * | 2017-06-23 | 2019-11-21 | Schaeffler Technologies AG & Co. KG | Laschenkette |
| DE102017116365B4 (de) * | 2017-07-20 | 2019-11-14 | Schaeffler Technologies AG & Co. KG | Laschenkette mit Sicherungselement |
-
2019
- 2019-04-23 DE DE102019110493.9A patent/DE102019110493A1/de not_active Ceased
-
2020
- 2020-03-23 EP EP20716696.8A patent/EP3959456A1/de not_active Withdrawn
- 2020-03-23 CN CN202080019559.2A patent/CN113544405A/zh active Pending
- 2020-03-23 WO PCT/DE2020/100228 patent/WO2020216391A1/de not_active Ceased
- 2020-03-23 US US17/442,159 patent/US20220170529A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| DE102019110493A1 (de) | 2020-10-29 |
| WO2020216391A1 (de) | 2020-10-29 |
| US20220170529A1 (en) | 2022-06-02 |
| CN113544405A (zh) | 2021-10-22 |
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