US20080287233A1 - Tightener for a Belt Drive Operating in the Presence of Oil - Google Patents

Tightener for a Belt Drive Operating in the Presence of Oil Download PDF

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Publication number
US20080287233A1
US20080287233A1 US11/912,117 US91211705A US2008287233A1 US 20080287233 A1 US20080287233 A1 US 20080287233A1 US 91211705 A US91211705 A US 91211705A US 2008287233 A1 US2008287233 A1 US 2008287233A1
Authority
US
United States
Prior art keywords
tightener
arm
base plate
oil
pin
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.)
Abandoned
Application number
US11/912,117
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English (en)
Inventor
Michele Cantatore
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CADOGAN SQUARE CLO BV
EFIBANCA SpA
INTERBANCA SpA
JP MORGAN EUROPE Ltd
Royal Bank of Scotland PLC
Banca Nazionale del Lavoro SpA
Citibank NA
JPMorgan Chase Bank NA
Eaton Vance Short Duration Diversified Income Fund
Original Assignee
Dayco Europe SRL
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 Dayco Europe SRL filed Critical Dayco Europe SRL
Assigned to DAYCO EUROPE S.R.L. CON UNICO SOCIO reassignment DAYCO EUROPE S.R.L. CON UNICO SOCIO ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CANTATORE, MICHELE
Publication of US20080287233A1 publication Critical patent/US20080287233A1/en
Assigned to JPMORGAN CHASE BANK N.A., JPMORGAN CHASE BANK N.A., MILAN BRANCH, CADOGAN SQUARE CLO B.V., CITIBANK N.A. - MILAN, EFIBANCA S.P.A., INTERBANCA S.P.A., THE ROYAL BANK OF SCOTLAND PLC, J.P. MORGAN EUROPE LIMITED, EATON VANCE SHORT DURATION DIVERSIFIED INCOME FUND, BANCA NAZIONALE DEL LAVORO S.P.A. reassignment JPMORGAN CHASE BANK N.A. SECURITY AGREEMENT Assignors: DAYCO EUROPE S.R.L.
Assigned to JPMORGAN CHASE BANK N.A., J.P. MORGAN EUROPE LIMITED, EATON VANCE SHORT DURATION DIVERSIFIED INCOME FUND, THE ROYAL BANK OF SCOTLAND PLC, INTERBANCA S.P.A., JPMORGAN CHASE BANK N.A., MILAN BRANCH, BANCA NAZIONALE DEL LAVORO S.P.A., EFIBANCA S.P.A., CADOGAN SQUARE CLO B.V., CITIBANK N.A. - MILAN reassignment JPMORGAN CHASE BANK N.A. CORRECTIVE ASSIGNMENT TO CORRECT THE ADDRESS OF THE THIRD ASSIGNEE PREVIOUSLY RECORDED ON REEL 025095 FRAME 0525. ASSIGNOR(S) HEREBY CONFIRMS THE SECURITY AGREEMENT. Assignors: DAYCO EUROPE S.R.L.
Assigned to DAYCO EUROPE S.R.L reassignment DAYCO EUROPE S.R.L RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: BANCA NAZIONALE DEL LAVORO S.P.A, CADOGAN SQUARE CLO B.V., CITIBANK N.A. - MILAN, EATON VANCE SHORT DURATION DIVERSIFIED INCOME FUND, EFIBANCA S.P.A., INTERBANCA S.P.A., J.P. MORGAN EUROPE LIMITED, JPMORGAN CHASE BANK N.A., MILAN BRANCH, JPMORGAN CHASE BANK, N.A., THE ROYAL BANK OF SCOTLAND PLC
Assigned to DEUTSCHE BANK AG, LONDON BRANCH, DEUTSCHE TRUSTEE COMPANY LIMITED reassignment DEUTSCHE BANK AG, LONDON BRANCH SECURITY AGREEMENT Assignors: DAYCO EUROPE S.R.L
Assigned to DAYCO EUROPE S.R.L reassignment DAYCO EUROPE S.R.L RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: DEUTSCHE BANK AG, LONDON BRANCH (AS AGENT AND AS SUCCESSOR TRUSTEE TO DEUTSCHE TRUSTEE COMPANY LIMITED)
Abandoned legal-status Critical Current

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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
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
    • F16H7/1209—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley with vibration damping means
    • F16H7/1218—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley with vibration damping means of the dry friction type
    • 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
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
    • F16H7/1254—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means
    • F16H7/1281—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means where the axis of the pulley moves along a substantially circular path
    • 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
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0802—Actuators for final output members
    • F16H2007/081—Torsion springs
    • 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
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/0829—Means for varying tension of belts, ropes, or chains with vibration damping means
    • F16H7/0831—Means for varying tension of belts, ropes, or chains with vibration damping means of the dry friction type

Definitions

  • the present invention relates to a tightener for a belt drive operating in the presence of oil.
  • Known belt drives such as for driving an internal combustion engine camshaft, are normally used in dry applications, in which a tightener is used to maintain correct tension of the belt.
  • Cam tighteners for dry applications comprising a fixed member with a supporting pin; a spring-loaded cam arm; an idle pulley fitted to the cam arm and cooperating with a timing belt; and a bushing of friction material interposed radially between the fixed pin and the cam arm to damp vibration of the belt.
  • chains are normally used, which cooperate with a shoe to maintain correct tension.
  • FIG. 1 shows an exploded view in perspective of a tightener in accordance with the present invention
  • FIG. 2 shows a front view of FIG. 1 ;
  • FIG. 3 shows a section along line III-III in FIG. 2 .
  • Number 1 in FIG. 1 indicates a tightener for a belt drive operating in the presence of oil, and comprising a fixed pin 2 ; a metal cam arm 3 mounted for rotation on fixed pin 2 and connected to a tensioning spring 4 ; and a hollow pulley 5 radially surrounding cam arm 3 and cooperating with and contacting a cog belt.
  • fixed pin 2 has a cylindrical mounting surface 6 having an axis A; a through hole 7 having an axis B eccentric with respect to axis A; an end shoulder 8 ; and a contoured head 9 at the opposite end of cylindrical surface 6 to end shoulder 8 .
  • Through hole 7 extends through contoured head 9 , which is symmetrical with respect to a plane through axes A and B.
  • Cam arm 3 fits radially onto mounting surface 6 by means of a bushing 10 made of antifriction material, e.g. teflon, and has an annular housing 11 , and a cylindrical outer surface 12 having an axis C eccentric with respect to axes A and B. More specifically, cylindrical outer surface 12 supports hollow pulley 5 by means of a bearing 13 , and housing 11 is open towards end shoulder 8 , houses the whole of tensioning spring 4 , and has a slot for connection to an end portion 14 of tensioning spring 4 .
  • a bushing 10 made of antifriction material, e.g. teflon
  • Cam arm 3 is supported axially by an annular base plate 15 connected perpendicularly to fixed pin 2 , and by a friction ring 16 interposed between cam arm 3 and base plate 15 and made of material capable of maintaining friction even in the presence of oil, such as BERAL 1122 marketed by Federal-Mogul Friction Products Gmbh.
  • the friction material used comprises an oil-resistant binder comprising caoutchouc; and a mixture of additives for obtaining friction in the presence of oil and comprising rock wool, magnesium oxide, graphite, and clay.
  • the physical characteristics of the material used are: specific weight (measured at 20° C.) 2.04*10 ⁇ 3 kg/cm ⁇ 3; thermal conductivity 1.00 W/m*° C.; approximate dry friction coefficient 0.47; and approximate oil-bath friction coefficient 0.10.
  • cam arm 3 has an integral, radially peripheral collar 17 facing base plate 15 and defining a seat to make friction ring 16 radially integral with cam arm 3 .
  • Base plate 15 comprises an inner edge 18 which rests axially on end shoulder 8 ; and a projection 19 projecting towards cam arm 3 and cooperating both with arm 3 , to define two limit positions, and with an end portion (not shown) opposite end portion 14 , to tension spring 4 .
  • cam arm 3 and contoured head 9 of fixed pin 2 define an annular seat 21 coaxial with axis A and for housing a supporting cup made of plastic, a Belleville washer 24 , and a circular cover plate 25 .
  • cup 23 comprises, integrally, a flat portion 26 perpendicular to axis A; and a peripheral edge 27 parallel to axis A.
  • Peripheral edge 27 houses Bellville washer 24 radially, and, together with cover plate 25 , defines an annular gap 28 to allow oil in to lubricate Belleville washer 24 and mounting surface 6 .
  • Belleville washer 24 is pressed axially against flat portion 26 by cover plate 25 .
  • cover plate 25 is connected angularly rigidly to contoured head 9 by a matching shape fit, and is fixed axially by caulking.
  • Tightener 1 is fitted to a wall of an internal combustion engine by means of a screw 29 housed inside through hole 7 . More specifically, contoured head 9 is bounded by a supporting surface 30 projecting axially with respect to cover plate 25 , and end shoulder 8 is bounded by a supporting surface 31 projecting axially with respect to base plate 15 , so that, when tightener 1 is fixed to the engine, the head 32 of screw 29 cooperates with supporting surface 30 , and supporting surface 31 directly contacts the wall of the engine to keep base plate 15 detached.
  • the pull exerted by the screw is therefore transmitted to fixed pin 2 , and the axial load of friction ring 16 , which is much less than the pull exerted by the screw, is controlled accurately by sizing Belleville washer 24 .
  • Belleville washer 24 in fact, is used in the maximum-compression condition, in which it exerts substantially constant force alongside minor variations in the axial dimension of cam arm 3 , caused, for example, by in-service wear of friction ring 16 .
  • tightener 1 comprises numerous component parts in common with a dry-operating tightener, thus enabling mass production cost benefits. More specifically, by replacing friction ring 16 with a PTFE ring, tightener 1 may also be used dry.
  • tensioning spring 4 is housed axially inside housing 11 of cam arm 3 provides for reducing length to adapt to applications featuring belts operating in the presence of oil, and which generally tend to replace chains which permit particularly short lengths.
  • friction ring 16 may be housed inside a groove defined by cam arm 3 , or may be glued.
  • Hollow pulley 5 and bearing 13 may be replaced by a shoe having a ring member fitted to cylindrical outer surface 12 and integral with cam arm 3 .
  • supporting cup 23 may be eliminated, and Belleville washer 24 may contact cam arm 3 directly, provided gap 28 is sized to allow sufficient oil through to lubricate the surfaces in relative motion.
  • the friction material used comprises a caoutchouc-based binder if a flexible friction ring 16 is required. If a rigid friction ring is required, caoutchouc is not used.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Transmission Devices (AREA)
  • Pulleys (AREA)
  • Advancing Webs (AREA)
  • Jigs For Machine Tools (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
US11/912,117 2005-04-20 2005-04-20 Tightener for a Belt Drive Operating in the Presence of Oil Abandoned US20080287233A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2005/000230 WO2006111988A1 (en) 2005-04-20 2005-04-20 Tightener for a belt drive operating in the presence of oil

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2005/000230 A-371-Of-International WO2006111988A1 (en) 2005-04-20 2005-04-20 Tightener for a belt drive operating in the presence of oil

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US13/271,457 Division US8690718B2 (en) 2005-04-20 2011-10-12 Tightener for a belt drive operating in the presence of oil

Publications (1)

Publication Number Publication Date
US20080287233A1 true US20080287233A1 (en) 2008-11-20

Family

ID=34968018

Family Applications (2)

Application Number Title Priority Date Filing Date
US11/912,117 Abandoned US20080287233A1 (en) 2005-04-20 2005-04-20 Tightener for a Belt Drive Operating in the Presence of Oil
US13/271,457 Active 2025-09-17 US8690718B2 (en) 2005-04-20 2011-10-12 Tightener for a belt drive operating in the presence of oil

Family Applications After (1)

Application Number Title Priority Date Filing Date
US13/271,457 Active 2025-09-17 US8690718B2 (en) 2005-04-20 2011-10-12 Tightener for a belt drive operating in the presence of oil

Country Status (7)

Country Link
US (2) US20080287233A1 (de)
EP (1) EP1877683B1 (de)
JP (1) JP4772865B2 (de)
CN (1) CN101218453B (de)
AT (1) ATE502233T1 (de)
DE (1) DE602005027001D1 (de)
WO (1) WO2006111988A1 (de)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050124447A1 (en) * 2001-11-13 2005-06-09 Olivier Message Instrumented take-up unit and related control method
US20080176687A1 (en) * 2007-01-22 2008-07-24 Holger Schever Tensioner and installation assembly
US20100145591A1 (en) * 2007-03-27 2010-06-10 Dayco Europe S.R.L. Drive for an internal combustion engine comprising an oil wet toothed belt and a tensioning shoe
US20100190594A1 (en) * 2007-06-05 2010-07-29 Adriano Rolando Pulley tensioner for an oil wet belt drive
US20110045929A1 (en) * 2006-12-04 2011-02-24 Adriano Rolando Pulley tensioner for a belt drive for use in contact with oil
US20110218066A1 (en) * 2007-06-05 2011-09-08 Adriano Rolando Pulley tensioner for an oil wet belt drive
CN102261443A (zh) * 2010-05-27 2011-11-30 盖茨优霓塔传动系统(苏州)有限公司 张紧器
US8690718B2 (en) 2005-04-20 2014-04-08 Dayco Europe S.R.L. Con Unico Socio Tightener for a belt drive operating in the presence of oil
US20140287859A1 (en) * 2012-10-22 2014-09-25 Litens Automotive Partnership Tensioner with increased damping
US20160215859A1 (en) * 2013-09-11 2016-07-28 Litens Automotive Partnership Tensioner with increased damping and arm on base cup configuration
US20180320764A1 (en) * 2015-10-28 2018-11-08 Litens Automotive Partnership Tensioner with first and second damping members and increased damping
US20180363742A1 (en) * 2017-06-16 2018-12-20 Gates Corporation Tensioner
CN109611523A (zh) * 2019-02-20 2019-04-12 无锡永凯达齿轮有限公司 高阻尼正时皮带张紧轮
US10753436B2 (en) * 2018-06-20 2020-08-25 Gates Corporation Tensioner
US10989280B2 (en) * 2017-06-16 2021-04-27 Gates Corporation Tensioner
US11168767B2 (en) * 2018-10-23 2021-11-09 Gates Corporation Tensioner
US11359702B2 (en) * 2019-07-25 2022-06-14 Shihwen Chan Multi-configuration belt tensioner
US11421561B2 (en) * 2017-07-05 2022-08-23 Gates Corporation Synchronous belt drive system

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7951030B2 (en) 2008-12-04 2011-05-31 The Gates Corporation Tensioner
DE202010017870U1 (de) * 2010-09-03 2012-11-27 Schaeffler Technologies AG & Co. KG Exzenter-Spannrolle
US8734279B2 (en) * 2011-06-08 2014-05-27 Gates Corporation Tensioner
US8926462B2 (en) 2012-10-24 2015-01-06 The Gates Corporation Tensioner
ITTO20131032A1 (it) * 2013-12-17 2015-06-18 Dayco Europe Srl Tenditore per una trasmissione a cinghia
DE102015222203B4 (de) * 2015-11-11 2020-03-12 Schaeffler Technologies AG & Co. KG Spielfreie Pendellagerung am Entkopplungsspanner
US20180056157A1 (en) * 2016-08-27 2018-03-01 Bernard Cohen Backyard tailgating golf game
US10995829B2 (en) * 2017-06-16 2021-05-04 Gates Corporation Tensioner
US11255414B2 (en) * 2019-05-15 2022-02-22 Gates Corporation Tensioner
CN116888383A (zh) * 2021-02-26 2023-10-13 戴科知识产权控股有限责任公司 具有平衡扭转弹簧力的高偏移皮带张紧器

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US7699732B2 (en) * 2001-11-13 2010-04-20 Aktiebolaget Skf Instrumented take-up unit and related control method
US8690718B2 (en) 2005-04-20 2014-04-08 Dayco Europe S.R.L. Con Unico Socio Tightener for a belt drive operating in the presence of oil
US8272983B2 (en) * 2006-12-04 2012-09-25 Dayco Europe S.R.L. Pulley tensioner for a belt drive for use in contact with oil
US20110045929A1 (en) * 2006-12-04 2011-02-24 Adriano Rolando Pulley tensioner for a belt drive for use in contact with oil
US20080176687A1 (en) * 2007-01-22 2008-07-24 Holger Schever Tensioner and installation assembly
US8326514B2 (en) 2007-03-27 2012-12-04 Dayco Europe S.R.L. Drive for an internal combustion engine comprising an oil wet toothed belt and a tensioning shoe
US20100145591A1 (en) * 2007-03-27 2010-06-10 Dayco Europe S.R.L. Drive for an internal combustion engine comprising an oil wet toothed belt and a tensioning shoe
US20100190594A1 (en) * 2007-06-05 2010-07-29 Adriano Rolando Pulley tensioner for an oil wet belt drive
US20110218066A1 (en) * 2007-06-05 2011-09-08 Adriano Rolando Pulley tensioner for an oil wet belt drive
US8292765B2 (en) * 2007-06-05 2012-10-23 Dayco Europe S.R.L. Pulley tensioner for an oil wet belt drive
US8641564B2 (en) * 2007-06-05 2014-02-04 Dayco Europe S.R.L. Pulley tensioner for an oil wet belt drive
CN102261443A (zh) * 2010-05-27 2011-11-30 盖茨优霓塔传动系统(苏州)有限公司 张紧器
US9790817B2 (en) 2012-10-22 2017-10-17 Litens Automotive Partnership Tensioner with increased damping
US20140287859A1 (en) * 2012-10-22 2014-09-25 Litens Automotive Partnership Tensioner with increased damping
US9726051B2 (en) * 2012-10-22 2017-08-08 Litens Automotive Partnership Tensioner with increased damping
US20160215859A1 (en) * 2013-09-11 2016-07-28 Litens Automotive Partnership Tensioner with increased damping and arm on base cup configuration
US9869379B2 (en) * 2013-09-11 2018-01-16 Litens Automotive Partnership Tensioner with increased damping and arm on base cup configuration
US20180320764A1 (en) * 2015-10-28 2018-11-08 Litens Automotive Partnership Tensioner with first and second damping members and increased damping
US10859141B2 (en) * 2015-10-28 2020-12-08 Litens Automotive Partnership Tensioner with first and second damping members and increased damping
US20180363742A1 (en) * 2017-06-16 2018-12-20 Gates Corporation Tensioner
US10968988B2 (en) * 2017-06-16 2021-04-06 Gates Corporation Tensioner
US10989280B2 (en) * 2017-06-16 2021-04-27 Gates Corporation Tensioner
US11421561B2 (en) * 2017-07-05 2022-08-23 Gates Corporation Synchronous belt drive system
US10753436B2 (en) * 2018-06-20 2020-08-25 Gates Corporation Tensioner
US11168767B2 (en) * 2018-10-23 2021-11-09 Gates Corporation Tensioner
CN109611523A (zh) * 2019-02-20 2019-04-12 无锡永凯达齿轮有限公司 高阻尼正时皮带张紧轮
US11359702B2 (en) * 2019-07-25 2022-06-14 Shihwen Chan Multi-configuration belt tensioner

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US20120040789A1 (en) 2012-02-16
EP1877683A1 (de) 2008-01-16
US8690718B2 (en) 2014-04-08
CN101218453A (zh) 2008-07-09
WO2006111988A8 (en) 2007-05-31
ATE502233T1 (de) 2011-04-15
JP4772865B2 (ja) 2011-09-14
WO2006111988A1 (en) 2006-10-26
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CN101218453B (zh) 2012-06-20
DE602005027001D1 (de) 2011-04-28

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