WO2013097884A1 - Courroie de transmission pour une transmission à variation continue ayant des éléments transversaux pourvus de zones de contact - Google Patents

Courroie de transmission pour une transmission à variation continue ayant des éléments transversaux pourvus de zones de contact Download PDF

Info

Publication number
WO2013097884A1
WO2013097884A1 PCT/EP2011/006610 EP2011006610W WO2013097884A1 WO 2013097884 A1 WO2013097884 A1 WO 2013097884A1 EP 2011006610 W EP2011006610 W EP 2011006610W WO 2013097884 A1 WO2013097884 A1 WO 2013097884A1
Authority
WO
WIPO (PCT)
Prior art keywords
transverse member
contact area
recess
drive belt
transverse
Prior art date
Application number
PCT/EP2011/006610
Other languages
English (en)
Inventor
Cornells Johannes Maria VAN DER MEER
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to EP11808174.4A priority Critical patent/EP2798236A1/fr
Priority to JP2014549366A priority patent/JP5921713B2/ja
Priority to PCT/EP2011/006610 priority patent/WO2013097884A1/fr
Publication of WO2013097884A1 publication Critical patent/WO2013097884A1/fr

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
    • 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

Definitions

  • the present invention relates to a drive belt for a continuously variable transmission having two pulleys, each having two pulley sheaves with an at least partially conical surface for wedging-in the drive belt.
  • the known drive belt comprises an endless carrier that is composed of a set of nested, flexible metal rings and a number of transverse members that together form an essentially continuous row along the circumference of the endless carrier and that each define a recess that opens towards an axial or lateral side of the drive belt and wherein the endless carrier is located.
  • Such a drive belt with generally C-shaped transverse members is known from, for example, the European patent publication No. EP-A-0 014 013, in particular figure 1 thereof.
  • the transverse members push each other along the circumference of the endless carrier from a driven pulley to a driving pulley of the transmission.
  • the front main face of a respectively succeeding transverse member is in contact with the rear main face of a respectively preceding transverse member, exerting a pushing force on such preceding transverse member in the process.
  • the entire head section takes part in such pushing contact.
  • vibrations occur in the drive belt, i.e. in the trajectory part thereof that spans from the driving pulley to the driven pulley, which vibrations are disadvantageous in that noise and/or mechanical stress is generated thereby.
  • the vibrations can be favourably reduced.
  • the said contact between the transverse members is realised through at least two contact areas, which areas are part of a main face of the transverse member.
  • one such contact area is located in the base part of each transverse member, radially outward from the tilting edge, and a second contact area is located in the top part of each transverse member close to an upper side thereof.
  • a radial separation between the said two contact areas is to be maximised, at least within the constraints dictated by the geometry and the manufacturing process of the transverse member.
  • the contact areas in accordance with the invention protrude relative to other parts of the main face concerned (i.e. those parts surrounding the contact areas) .
  • the thickness of the transverse member is thus greater than at the location of the said other parts of the main face concerned.
  • greater thickness is small in absolute terms and will typically be in the order of magnitude of between a minimum of five to ten and a maximum of around a hundred micrometres.
  • the thickness at the contact area in the top part of the transverse member is preferably somewhat greater than at the contact area located in the base part thereof.
  • the surface area of the contact area in the top part of the transverse member is equal to or larger than the surface area of the contact area in the base part of the transverse member .
  • the said two contact areas each extend to the axial sides of the transverse member.
  • one part contact area part in the base part is located below the recess and extends over a major part, preferably over the whole, of the axial extent thereof.
  • the said contact area located in the top part of the transverse member is composed of two parts, each such respective contact area part likewise being located towards a respective axial side of the transverse member.
  • the present invention is based on the technical insight that without the said defined contact areas, relatively high lying, i.e. projecting areas will occur randomly in each transverse member of the drive belt. As a result a point of (initial) contact between the transverse members varies randomly along the circumference of the drive belt and the abovementioned, detrimental vibrations can easily occur.
  • the measure (s) according to the invention it is ensured in a relatively simple and reliable manner that the contact between the transverse members is in principle uniform throughout the drive belt.
  • figure 5 shows a first embodiment of a generally C- shaped transverse member according to the present invention
  • figure 6 shows a second embodiment of a generally C- shaped transverse member according to the present invention.
  • figure 7 shows a third embodiment of a generally C- shaped transverse member according to the present invention.
  • Figure 1 diagrammatically shows the central parts of a continuously variable transmission for the drive of, for example, passenger motor vehicles.
  • This transmission is known per se and comprises at least a first and a second drive wheel, or pulley 1, 2 and a drive belt 3 accommodated between the conical sheaves 4,. 5 of the pulleys 1 and 2.
  • At least one sheave 4 of each pulley 1, 2 is axially movable over a respective pulley shaft 6, 7.
  • electronically controllable and hydraulically acting movement means are generally accommodated in the transmission, which means are not shown in the figures.
  • the known drive belt 3 is composed of an endless carrier 31 and a number of transverse members 32 that are mounted on the carrier 31 in an essentially contiguous row along the circumference thereof.
  • the transverse members 32 are accommodated in the drive belt 3 so as to be freely movable along the circumference of the drive belt 3.
  • Figures 2 provides a close-up of the transverse member 32, looking in the circumferential direction L of the drive belt 3, and figure 3 provides a side view of the transverse member 32, looking from the right to the left of figure 2.
  • the known transverse member 32 is shaped similar to the letter "C", i.e. is generally C-shaped.
  • the known transverse member 32 defines a centrally located recess 33 that is open towards one axial side of the transverse member 32.
  • the known transverse member 32 thus includes three main parts 34, 35, 36, whereof a first or base part 34 lies below or inward from the recess 33 in the radial direction R, whereof a second or connecting part 35 lies in line with the recess 33 in the axial direction A and whereof a third or top part 36 lies radially outward from the recess 33.
  • the endless carrier 31 is located in the said recess 33.
  • the base part 34 is provided with a pulley contact face 37 for producing the friction contact with the pulley sheaves 4, 5.
  • These pulley contact faces 37 of the transverse member 32 are mutually oriented at an angle ⁇ that corresponds to an angle ⁇ that is defined between the conical sheaves 4, 5 of the pulleys 1, 2 (figure 1) .
  • the typical construction of the endless carrier 31 is shown, that includes a number of radially nested rings.
  • the present invention is schematically illustrated in a first embodiment thereof.
  • the front main face 39 of the transverse member 32 is designed with two so-called contact areas 50 and 60 that are indicated by the hatchings and that are raised relative to the remaining, other parts of the front main face 39.
  • the thickness of the transverse member 32 i.e. the separation or distance between its front main face 39 and its rear main face 38, is greater than outside these areas 50, 60.

Abstract

L'invention concerne un élément transversal (32), dans l'ensemble en forme de C, pour une courroie de transmission (3), qui délimite un évidement (33) en situation centrale et ouvert vers un côté axial de celle-ci. L'élément transversal (32) comprend une partie de base (34) située au-dessous de l'évidement (33), une partie de liaison (35) alignée avec l'évidement (33) et une partie supérieure (36) située au-dessus de l'évidement (33), lequel élément transversal (32) est pourvu d'un bord incliné (18) constituant une transition entre une section supérieure et une section inférieure trapézoïdale de l'élément transversal (32). Une face principale (39) de l'élément transversal (32) est dotée d'au moins deux zones de contact (50, 60) qui sont en relief par rapport aux autres parties de cette face principale (39) et dont une zone de contact inférieure (50) est située au-dessus du bord incliné (18) dans ladite partie de base (34) et dont une surface de contact supérieure (60) est située dans ladite partie supérieure (36).
PCT/EP2011/006610 2011-12-30 2011-12-30 Courroie de transmission pour une transmission à variation continue ayant des éléments transversaux pourvus de zones de contact WO2013097884A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP11808174.4A EP2798236A1 (fr) 2011-12-30 2011-12-30 Courroie de transmission pour une transmission à variation continue ayant des éléments transversaux pourvus de zones de contact
JP2014549366A JP5921713B2 (ja) 2011-12-30 2011-12-30 接触領域を備えた横方向部材を有する、無段変速機用の駆動ベルト
PCT/EP2011/006610 WO2013097884A1 (fr) 2011-12-30 2011-12-30 Courroie de transmission pour une transmission à variation continue ayant des éléments transversaux pourvus de zones de contact

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/006610 WO2013097884A1 (fr) 2011-12-30 2011-12-30 Courroie de transmission pour une transmission à variation continue ayant des éléments transversaux pourvus de zones de contact

Publications (1)

Publication Number Publication Date
WO2013097884A1 true WO2013097884A1 (fr) 2013-07-04

Family

ID=45478268

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/006610 WO2013097884A1 (fr) 2011-12-30 2011-12-30 Courroie de transmission pour une transmission à variation continue ayant des éléments transversaux pourvus de zones de contact

Country Status (3)

Country Link
EP (1) EP2798236A1 (fr)
JP (1) JP5921713B2 (fr)
WO (1) WO2013097884A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018122399A1 (fr) 2016-12-30 2018-07-05 Robert Bosch Gmbh Procédé de fabrication d'un segment transversal pour une courroie d'entraînement d'une transmission à variation continue

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0014013A1 (fr) 1979-01-19 1980-08-06 Van Doorne's Transmissie B.V. Courroie de transmission composite avec éléments transversaux munis de moyens de couplage mutuels
US6074317A (en) * 1996-07-30 2000-06-13 Nissan Motor Co., Ltd. Belt for continuously variable transmission with suppressed slip relative to the pulleys
EP1061285A1 (fr) 1999-06-18 2000-12-20 Honda Giken Kogyo Kabushiki Kaisha Courroie pour transmission continûment variable
WO2008077870A1 (fr) * 2006-12-27 2008-07-03 Robert Bosch Gmbh Courroie de transmission pour boîte de vitesses à variation continue comportant des éléments transversaux pourvus de zones de contact

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63187751U (fr) * 1987-05-25 1988-12-01
JP3696462B2 (ja) * 1999-06-18 2005-09-21 本田技研工業株式会社 無段変速機用ベルト

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0014013A1 (fr) 1979-01-19 1980-08-06 Van Doorne's Transmissie B.V. Courroie de transmission composite avec éléments transversaux munis de moyens de couplage mutuels
US6074317A (en) * 1996-07-30 2000-06-13 Nissan Motor Co., Ltd. Belt for continuously variable transmission with suppressed slip relative to the pulleys
EP1061285A1 (fr) 1999-06-18 2000-12-20 Honda Giken Kogyo Kabushiki Kaisha Courroie pour transmission continûment variable
WO2008077870A1 (fr) * 2006-12-27 2008-07-03 Robert Bosch Gmbh Courroie de transmission pour boîte de vitesses à variation continue comportant des éléments transversaux pourvus de zones de contact

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018122399A1 (fr) 2016-12-30 2018-07-05 Robert Bosch Gmbh Procédé de fabrication d'un segment transversal pour une courroie d'entraînement d'une transmission à variation continue

Also Published As

Publication number Publication date
EP2798236A1 (fr) 2014-11-05
JP5921713B2 (ja) 2016-05-24
JP2015503713A (ja) 2015-02-02

Similar Documents

Publication Publication Date Title
CN110637174B (zh) 用于无级变速器的传动带的横向部段以及随其提供的传动带和无级变速器
JP6580129B2 (ja) ほぼｖ字形の横断部材を備える無段変速機用の駆動ベルト
CN211314975U (zh) 传动带
EP2115319B1 (fr) Courroie de transmission pour boîte de vitesses à variation continue comportant des éléments transversaux pourvus de zones de contact
US10883567B2 (en) Transverse member for a drive belt for a continuously variable transmission
EP2798236A1 (fr) Courroie de transmission pour une transmission à variation continue ayant des éléments transversaux pourvus de zones de contact
EP3140567B1 (fr) Élément transversal destiné à une courroie d'entraînement pour transmission à variation continue et courroie d'entraînement pourvue de celui-ci
CN101208538B (zh) 具有弯曲的横向元件的推型带
JP5625485B2 (ja) 動力伝達装置
EP2738419A1 (fr) Courroie d'entraînement pour transmission à variation continue de type poulie avec des éléments transversaux pourvus de plusieurs surfaces de contact de poulie
EP3175141B1 (fr) Élément transversal généralement en forme de c pour courroie d'entraînement destinée à une transmission à variation continue
NL1043521B1 (en) A drive belt provided with a plurality of transverse segments and a ring stack that is confined in a central opening of these transverse segments
CN209943426U (zh) 用于无级变速器的传动带的横向部段
JP5532788B2 (ja) 動力伝達装置
NL2027233B1 (en) A drive belt provided with a plurality of transverse segments and a ring stack confined in a central opening of these transverse segments
NL2027215B1 (en) A drive belt provided with a plurality of transverse segments and a ring stack confined in a central opening of these transverse segments
KR20190080785A (ko) 무단 변속기용 구동 벨트를 위한 횡방향 세그먼트 및 이를 포함하는 구동 벨트
JP5614019B2 (ja) 動力伝達装置
JP2008169879A (ja) 動力伝達チェーンおよび動力伝達装置
JP2008215448A (ja) 動力伝達チェーンおよび動力伝達装置
JP2014009787A (ja) 動力伝達チェーンおよび動力伝達装置
JP2009047297A (ja) 動力伝達チェーンおよび動力伝達装置
JP2013245746A (ja) 動力伝達チェーンおよび動力伝達装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11808174

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2011808174

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2014549366

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE