GB2193788A - Friction clutch driven plate - Google Patents

Friction clutch driven plate Download PDF

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Publication number
GB2193788A
GB2193788A GB08712956A GB8712956A GB2193788A GB 2193788 A GB2193788 A GB 2193788A GB 08712956 A GB08712956 A GB 08712956A GB 8712956 A GB8712956 A GB 8712956A GB 2193788 A GB2193788 A GB 2193788A
Authority
GB
United Kingdom
Prior art keywords
driven plate
hub
spring
projections
body part
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.)
Granted
Application number
GB08712956A
Other versions
GB2193788B (en
GB8712956D0 (en
Inventor
Anthony John Curtis
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.)
Automotive Products PLC
Original Assignee
Automotive Products PLC
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 Automotive Products PLC filed Critical Automotive Products PLC
Publication of GB8712956D0 publication Critical patent/GB8712956D0/en
Publication of GB2193788A publication Critical patent/GB2193788A/en
Application granted granted Critical
Publication of GB2193788B publication Critical patent/GB2193788B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • F16F15/121—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon using springs as elastic members, e.g. metallic springs
    • F16F15/123—Wound 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/32—Belleville-type 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • F16F15/129—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon characterised by friction-damping means
    • F16F15/1292—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon characterised by friction-damping means characterised by arrangements for axially clamping or positioning or otherwise influencing the frictional plates

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

A friction clutch driven plate is provided in which a spring 50, Fig. 2, is interposed between a radial hub flange 8 (on the hub 4 of the driven plate 2) and radial side plate 26 (also on the hub) of a carrier assembly carrying friction facings 12, 14. The spring 50, which is axially deformable can take up axial play between the side plate 26 and hub flange 8 and comprises a resilient and initially flat ring shaped part 51, Fig. 4, having circumferentially spaced axial projections 56 on one side face 52 of the ring and circumferentially spaced axial projections 58 on the other side face 54 of the ring. The projections 56 alternate with the projections 58. Flat bearing faces 57 and 59, on the projections 56 and 58 respectively, rub against radial sides of the hub flange and the side plate. The spring 50 is formed of synthetic plastics material. <IMAGE>

Description

SPECIFICATION Friction clutch driven plate This invention concerns a friction clutch driven plate.
Clutch driven plates are known comprising a central hub provided with a hub flange fast in rotation with said hub, a friction material carrier assembly mounted on said hub such that the hub and carrier assembly can rotate one relative to the other to a limited extent, and said carrier assembly comprising a side plate axially spaced from the hub flange. It is known to the interpose between the side plate and hub flange a fibre washer bearing against the hub flange, a metal hysteresis washer bearing against the fibre washer and having tags at its outer periphery engaging with the side plate to be fast in rotation with the side plate, and either a metal Belleville spring washer or a wavey metal spring washer bearing against the side plate and the hysteresis washer.
According to a first aspect of the invention a friction clutch driven plate comprises a central hub provided with a hub flange fast in rotation with said hub, a friction material carrier assembly mounted on said hub such that the hub and carrier assembly can rotate one relative to the outer to a limited extent, said carrier assembly comprising a side plate axially spaced from the hub flange, a ring shaped spring surrounding an axis of the driven plate and disposed between the side plate and the hub flange to take up axial play between said side plate and hub flange, said spring comprising ring shaped body part provided at a first side with circumferentially spaced first projections projecting axially of the ring shaped body part away from said body part and provided at an opposite second side with circumferentially spaced second projections projecting axially of the ring shaped body part away from said body part and in an opposite direction to the first projections, said first projections at said first side of the body part being opposite spaces between said second projections at said second side of the body part, and said ring shaped body part being resilient and axially deformable.
According to a second aspect of the invention a friction clutch driven plate comprises a central hub provided with a hub flange fast in rotation with said hub, a friction material carrier assembly mounted on said hub such that said hub and carrier assembly can rotate one relative to the other to a limited extent, said carrier assembly comprising a side plate axially spaced from the hub flange, and a spring of synthetic plastics material between the side plate and the hub flange to take up axial play between said side plate and hub flange.
The plastics spring may be a ring. That ring may have a plurality of substantially axially projecting circumferentially spaced projections on one side alternating with opposite and substantially axially projecting circumferentially spaced projections on the opposite side of the ring.
The plastics spring may bear directly on the hub flange and/or may bear directly on the side plate. The plastics spring may thus act as an hysteresis washer and may replace the aforementioned three components in above mentioned known driven plate, namely the fibre washer, the metal hysteresis washer, and the metal spring washer. Therefore a clutch driven plate may be formed in accordance with the second aspect of the invention which may be cheaper to produce since the plastics spring can replace three hitherto required parts and be subjected to less wear by reason of the metal to plastics contact between the plastics spring and the hub and hub flange.
Each aspect of the invention will now be further described, by way of example, with reference to the accompanying drawings in which: Fig. 1 is a plan view of a friction clutch driven plate formed according to the first and second aspects of the invention; Fig.2 is a section on the line Il-Il in Fig.1; Fig.3 is a plan view of the spring in the driven plate in Fig.1; Fig.4 is a section on line IV--IV in Fig.3, and Fig.5 is a view similar to Fi-g.4 of the spring undergoing axial deformation.
With reference to the drawings, a friction clutch driven plate 2, for rotation about axis X, comprises a metal hub 4 internally splined at 6 to engage an axially splined shaft (not shown), for example, an input shaft to a motor vehicle gear box. The driven plate may be used in a clutch to transmit rotary motion from a prime mover for example, an internal combustion engine of a motor vehicle. Integral with the hub 4 is an hub flange 8 having windows 10.
Two annular facings 12 and 14 of friction material are riveted at 16 in known manner to resilient, peripheral segments 18 (known per se) of metal disc 20 forming part of a friction material carrier assembly 22 further comprising axially spaced, annular, metal side plates 24 and 26 on either side of the hub flange 8.
The segment disc 20 and the side plates 24 and 26 are locked fast together by stop rivets 28 (known per se) disposed in known peripheral notches 30 in the hub flange 8 allowing a limited relative rotation between the hub 4 and carrier assembly 22, about the axis X, to an extent limited by the angular width of the notches about the axis. In known manner torsional vibration damping springs 32 are disposed in the windows 10, and in coincident windows 34, 36 and 38 in the segment disc 20 and side plates 24 and 26, respectively. A spacer washer 40 of synthetic plastics ma terial is disposed between the hub 4 and the inner peripheries of the side plate 24 and segment disc 20. The spacer washer has a peripheral flange 42 between the hub flange 8 and the side plate 24.That flange 42 has axially projecting ribs 44 forming dogs engaging in notches 46 in the inner peripheries of the side plate 24 and disc 20.
A spring 50 is disposed about the hub 6 and between the hub flange 8 and the side plate 26. The spring 50 comprises a resilient ring shaped body 51 (Figs.3 and 4), which before the ring 51 is subject to any axial forces thereof, is (as shown in Figs.3 and 4) substantially flat or planar in a given plane.
The ring 51 has substantially flat opposite end faces 52 and 54 in Figs.3 and 4 which show that the unstressed ring has the shape of a portion of a right cylinder in which the portion is bounded by two axially spaced planes each containing a respective said end face 52 or 54 and extending at substantially a right angle to the axis of the cylinder. Similar lands or castellations forming projections 56 and 58 extend, axially of the ring 51, from the end faces 52 and 54 and are such that when the ring 51 is flat, as Figs.3 and 4, the projections 56 are on one side of the plane of the ring and the projections 58 are on the opposite side of that plane. In plan view the projections are substantially rectangular.The projections 56 are substantially equi-angularly spaced about the spring 50 as are projections 58 but these latter are located substantially mid-way between the projections 56 whereby the projections on one side of the ring are staggered or alternate with the projections on the opposite side. When the spring 50 is clamped between two opposed flat faces such as face 26A of the side plate 26 and face 8A of the hub flange 8 the spring can be axially deformed resiliently into an attitude exemplified in Fig.5 in which the ring 51 adopts a substantially sinusoidal shape circumferentially.
But on the ciamping force relaxing, the spring 50 can resume a shape more akin to that in Fig.4. Therefore if the carrier assembly 22 is moved axially the right in Fig.2, relatively to the hub flange 8, the spring 50 becomes axially deformed in a manner indicated by Fig.5.
But on that moving force relaxing, the spring 50 can resile axially to take up axial play between the hub flange 8 and side plate 26 and axially centralise the carrier assembly 22 with respect to the hub 4.
The spring 50 also acts to provide an hysteresis effect during relative rotation between the hub 4 and carrier assembly 22,since the projections 56 have flat faces 57 which bear on the hub flange 8 and the projections 58 have flat faces 59 which bear on the side plate 26. Each of the bearing faces 57, 59 extends substantially radially of the axis of the ring 51 and also circumferentially of the ring.
Also as can be understood from Fig.4 each of the flat bearing faces 57 or 59 lies in a plane which is transverse, for example at 90 , to the axis of the ring 51.
In a particular embodiment the spring 50 is made of synthetic plastics material. That can be any plastics material which gives the spring adequate resilence to positively resile after an axial deformation. For example the spring may be made of polytetrafluoroethylene (PTFE) or a polyamide. Of those two a polyamide is preferred, for example a nylon 66, as we believe that a spring 50 of nylon 66 has the better capacity to resile to its original shape after axial deformation than one of PTFE.

Claims (20)

1. A friction cluth driven plate comprising a central hub provided with a hub flange fast in rotation with said hub, a friction material carrier assembly mounted on said hub such that the hub and carrier assembly can rotate one relative to the other to a limited extent, said carrier assembly comprising a side plate axially spaced from the hub flange, a ring shaped spring surrounding an axis of the driven plate and disposed between the side plate and the hub flange to take up axial play between said side plate and hub flange, said spring comprising ring shaped body part provided at a first side with circumferentially spaced first projections projecting axially of the ring shaped body part away from said body part and provided at an opposite second side with circumferentially spaced second projections projecting axially of the ring shaped body part away from said body part and in an opposite direction to the first projections, said first projections at said first side of the body part being opposite spaces between said second projections at said second side of the body part, and said ring shaped body part being resilient and axially deformable.
2. A driven plate as claimed in Claim 1, in which, initially before the spring is subject to any axially directed force, said ring shaped body part is substantially flat or planar in a given plane and the first projections project on one side of the plane and the second projection project on the opposite side of the plane.
3. A driven plate as claimed in Claim 1 or Claim 2 in which, initially before the spring is subject to any axially directed force, said body part has substantially the shape of a portion of a right cylinder in which the portion is bounded by two axially spaced planes each extending at substantially a right angle to the axis of the cylinder.
4. A driven plate as claimed in any one preceding claim, in which each said projection has a substantially flat bearing face extending substantially radially of the axis of the ring shaped body part and also circumferentially of said ring shaped body part, each said bearing face lies in a plane extending transversely to the axis of said ring shaped body part, and the bearing faces on the first projections all face in the same general axial direction which is opposite to the general axial direction in which the bearing faces on the second projections face.
5. A driven plate as claimed in any one preceding claim, in which said spring bears directly on said hub flange.
6. A driven plate as claimed in any one preceding claim, in which said spring bears directly on said side plate.
7. A driven plate as claimed in any one preceding claim, in which said spring is formed of synthetic plastics material.
8. A driven plate as claimed in Claim 7, in which the plastics material is a polyamide or polytetrafluoroethylene.
9. A friction clutch driven plate as claimed in Claim 1, in which said spring is substantially as hereinbefore described with reference to the accompanying drawings.
10. A friction clutch including a driven plate as claimed in any one preceding claim.
11. A motor vehicle having a clutch as claimed in Claim 10.
12. A friction clutch driven plate comprising a central hub provided with a hub flange fast in rotation with said hub, a friction material carrier assembly mounted on said hub such that the hub and carrier assemly can rotate one relative to the other to a limited extent, said carrier assembly comprising a side plate axially spaced from the hub flange, and a spring of synthetic plastics material between the side plate and the hub flange to take up axial play between said side plate and hub flange.
13. A driven plate as claimed in Claim 12, in which the plastics spring is a ring.
14. A driven plate as claimed in Claim 13, in which the ring has a plurality of substantially axially projecting circumferentially spaced projections on one side alternating with oppositely and substantially axially projecting circumferentially spaced projections on the opposite side of the ring.
15. A driven plate as claimed in any one of Claims 12 to 14, in which said plastics spring bears directly on said hub flange.
16. A driven plate as claimed in any one of Claims 12 to 14, in which said plastics spring bears directly on said side plate.
17. A driven plate as claimed in any one of Claims 12 to 16 in which the plastics material is a polyamide or polytetrafluorethylene.
18. A friction clutch driven plate as claimed in Claim 12, in which said plastics spring is substantially as hereinbefore described with reference to the accompanying drawings.
19. A friction clutch including a driven plate as claimed in any one of claims 12 to 18.
20. A motor vehicle having a clutch as claimed in Claim 19.
GB8712956A 1986-08-15 1987-06-03 Friction clutch driven plate Expired - Lifetime GB2193788B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB868619870A GB8619870D0 (en) 1986-08-15 1986-08-15 Friction clutch driven plate

Publications (3)

Publication Number Publication Date
GB8712956D0 GB8712956D0 (en) 1987-07-08
GB2193788A true GB2193788A (en) 1988-02-17
GB2193788B GB2193788B (en) 1990-05-30

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GB868619870A Pending GB8619870D0 (en) 1986-08-15 1986-08-15 Friction clutch driven plate
GB8712956A Expired - Lifetime GB2193788B (en) 1986-08-15 1987-06-03 Friction clutch driven plate

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB868619870A Pending GB8619870D0 (en) 1986-08-15 1986-08-15 Friction clutch driven plate

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GB (2) GB8619870D0 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2665232A1 (en) * 1990-07-26 1992-01-31 Fichtel & Sachs Ag CLUTCH DISC.
FR2678337A1 (en) * 1991-06-25 1992-12-31 Valeo TORSION DAMPER DEVICE, IN PARTICULAR FOR AUTOMOTIVE VEHICLES.
FR2712951A1 (en) * 1993-11-26 1995-06-02 Fichtel & Sachs Ag Axially tightened friction ring torsional oscillation damper in a motor vehicle transmission.
US5431269A (en) * 1992-12-08 1995-07-11 Fichtel & Sachs Ag Transmission for a motor vehicle with a friction clutch having a clutch disc with torsionally locked friction ring
DE4345561B4 (en) * 1992-12-08 2008-01-17 Zf Sachs Ag Clutch plate with rotationally fixed friction ring - comprises base body of ring being provided with axial projections non-rotationally engaging hub teeth gaps
US8182023B2 (en) 2010-03-16 2012-05-22 Sabic Innovative Plastics Ip B.V. Plastically deformable spring energy management systems and methods for making and using the same
WO2014053128A1 (en) * 2012-10-01 2014-04-10 Schaeffler Technologies AG & Co. KG Torsional vibration damper and a friction ring for same

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4368812A (en) * 1979-08-23 1983-01-18 Luk Lamellen Und Kupplungsbau Gmbh Clutch plate
GB2123925A (en) * 1982-07-20 1984-02-08 Sachs Systemtechnik Gmbh Clutch disc for a motor vehicle friction clutch
GB2127131A (en) * 1982-09-16 1984-04-04 Daikin Mfg Co Ltd Damper disc
EP0129978A1 (en) * 1983-06-11 1985-01-02 Automotive Products Public Limited Company Friction clutch driven plate
GB2147085A (en) * 1983-09-24 1985-05-01 Fichtel & Sachs Ag Friction clutch for a motor vehicle
US4574932A (en) * 1982-03-26 1986-03-11 Valeo Torsion damping assembly for automotive clutches
GB2174478A (en) * 1985-04-25 1986-11-05 Luk Lamellen & Kupplungsbau Torsional vibration damper with a force accumulator which clamps the coaxial assemblies of the damper axially together

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4368812A (en) * 1979-08-23 1983-01-18 Luk Lamellen Und Kupplungsbau Gmbh Clutch plate
US4574932A (en) * 1982-03-26 1986-03-11 Valeo Torsion damping assembly for automotive clutches
GB2123925A (en) * 1982-07-20 1984-02-08 Sachs Systemtechnik Gmbh Clutch disc for a motor vehicle friction clutch
GB2127131A (en) * 1982-09-16 1984-04-04 Daikin Mfg Co Ltd Damper disc
EP0129978A1 (en) * 1983-06-11 1985-01-02 Automotive Products Public Limited Company Friction clutch driven plate
GB2147085A (en) * 1983-09-24 1985-05-01 Fichtel & Sachs Ag Friction clutch for a motor vehicle
GB2174478A (en) * 1985-04-25 1986-11-05 Luk Lamellen & Kupplungsbau Torsional vibration damper with a force accumulator which clamps the coaxial assemblies of the damper axially together

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2665232A1 (en) * 1990-07-26 1992-01-31 Fichtel & Sachs Ag CLUTCH DISC.
FR2678337A1 (en) * 1991-06-25 1992-12-31 Valeo TORSION DAMPER DEVICE, IN PARTICULAR FOR AUTOMOTIVE VEHICLES.
US5431269A (en) * 1992-12-08 1995-07-11 Fichtel & Sachs Ag Transmission for a motor vehicle with a friction clutch having a clutch disc with torsionally locked friction ring
DE4345561B4 (en) * 1992-12-08 2008-01-17 Zf Sachs Ag Clutch plate with rotationally fixed friction ring - comprises base body of ring being provided with axial projections non-rotationally engaging hub teeth gaps
FR2712951A1 (en) * 1993-11-26 1995-06-02 Fichtel & Sachs Ag Axially tightened friction ring torsional oscillation damper in a motor vehicle transmission.
ES2122823A1 (en) * 1993-11-26 1998-12-16 Fichtel & Sachs Ag Friction clutch for a transmission of a motor vehicle and a torsional damper for a friction clutch
US8182023B2 (en) 2010-03-16 2012-05-22 Sabic Innovative Plastics Ip B.V. Plastically deformable spring energy management systems and methods for making and using the same
US8616618B2 (en) 2010-03-16 2013-12-31 Sabic Innovative Plastics Ip B.V. Methods absorbing energy using plastically deformable coil energy absorber
US8840171B2 (en) 2010-03-16 2014-09-23 Sabic Innovative Plastics Ip B.V. Plastically deformable coil energy absorber systems
WO2014053128A1 (en) * 2012-10-01 2014-04-10 Schaeffler Technologies AG & Co. KG Torsional vibration damper and a friction ring for same

Also Published As

Publication number Publication date
GB2193788B (en) 1990-05-30
GB8712956D0 (en) 1987-07-08
GB8619870D0 (en) 1986-09-24

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