WO1992000470A1 - Torsional vibration damper - Google Patents

Torsional vibration damper Download PDF

Info

Publication number
WO1992000470A1
WO1992000470A1 PCT/GB1991/000535 GB9100535W WO9200470A1 WO 1992000470 A1 WO1992000470 A1 WO 1992000470A1 GB 9100535 W GB9100535 W GB 9100535W WO 9200470 A1 WO9200470 A1 WO 9200470A1
Authority
WO
WIPO (PCT)
Prior art keywords
torsional vibration
vibration damper
damper according
resilient means
end cap
Prior art date
Application number
PCT/GB1991/000535
Other languages
French (fr)
Inventor
Ralph Anthony Upton
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 WO1992000470A1 publication Critical patent/WO1992000470A1/en

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
    • 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
    • F16F15/12353—Combinations of dampers, e.g. with multiple plates, multiple spring sets, i.e. complex configurations

Definitions

  • the present invention relates to torsional vibration dampers and in particularly to torsional vibration dampers suitable for use in a friction clutch.
  • the present invention aims to provide a torsional vibration damper having a high torsional stiffness.
  • the present invention provides a torsional vibration damper comprising a driving member and a driven member mounted for rotation relative thereto, first and second end caps mounted on the members, and resilient means interposed between the end caps to resist said relative rotation, the resilient means comprising two resilient members mounted side by side.
  • the resilient members may be at substantially the same distance from the axis of the damper.
  • the torsional vibration damper further comprises auxiliary resilient means interposed between the end caps and acting to resist said relative rotation after a predetermined initial rotation.
  • the torsional vibration damper further comprises stop means which limits movement of the end caps against the auxiliary resilient means.
  • one end cap has a projection, the auxiliary resilient means being mounted on the projection.
  • the end cap has a stud and the auxiliary resilient means has a hole therein for mounting it on the stud.
  • the end cap has a hole therein and the auxilary resilient means has a stud thereon for engagement with the hole.
  • the torsional vibrational damper further comprises a packing member between the driving member and the driven member the packing member being frictionally rotatable relative to the driving member or the driven member.
  • the torsional vibrational damper comprises a plurality of packing members circumferentially spaced around the damper.
  • the packing member or members may be mounted on the driving member.
  • Fig 1 is a section through a clutch driven plate assembly including a torsional vibration damper according to a first embodiment of the present invention
  • Fig 2 is a view of the assembly of fig 1 without the side plates and hub;
  • Fig 3 is a view of a side plate of the assembly of fig 1;
  • Fig 4 is an enlarged view of one of the end caps of fig
  • Fig 5 and Fig 6 are views of an elastomeric buffer of the assembly of Fig 1,
  • Fig 7 is a section through a clutch driven plate assembly including a torsional vibration damper according to a second embodiment of the invention
  • Fig 8 is a view, similar to Fig 2 , of the assembly of Fig 7, nd
  • Fig 9 is a graph showing the torque characteristic of the a s embly of Figs 1 to 6.
  • a clutch driven plate comprises a driven member in the form of a hub 10 having a radially extending hub flange 12.
  • a driving member in the form of an annular carrier plate 14 has a central aperture 15.
  • Two annular friction facings 18,20 are mounted one on either side of an outer region 22 of the carrier plate 14.
  • Two annular support plates 24,26 are mounted one on either side of an inner region 28 of the carrier plate 14.
  • the central apertures 30 of the support plates 24,26 are the same size as the central aperture 16 of the carrier plate 14.
  • the carrier plate 14 is fitted over the flange 12 so that it is rotatable relative to the flange.
  • Two annular side plates 40,42 as shown in Fig 3 are mounted one on either side of the hub flange 12.
  • the side plates 40,42 are secured to the hub flange 12 by rivets 44 and extend radially outwards on either side of the carrier plate 14.
  • the carrier plate 14 and support plates 24,26 each have eight apertures which are aligned to form carrier- windows 46.
  • the side plates 40,42 each have eight side Plate windows 48 which are aligned with the carrier windows 46.
  • each carrier window 46 a pair of end caps 50,52 is mounted in each carrier window 46.
  • Each end cap 50,52 comprises a back plate 54 which rests against a respective end 56,58 of one of the carrier windows 46, a stop 60 protruding from the back plate 54 near it:: radially outer end 62, and an end cap projection 63 protruding from the back plate near its radially inner end 66.
  • a stud 64 protrudes from one end cap projection 63 (shown in fig 4), and a buffer 68, having a hole 67 therein, (shown in fig 5) is mounted on the stud such that it extends beyond the end of the stud.
  • the buffer is of elastomeric material.
  • an abutment surface 70 is formed opposite the buffer 68.
  • each end cap 50,52 extends out through opposite side plate windows 48 and rest against the ends 73, 74 of the side plate windows 43.
  • a spring mounting 76 protrudes from each lug 72.
  • a pair of helical springs 80 is mounted on each pair of opposite spring mountings 76.
  • Each pair of springs 80 comprises an inner spring 82 and an outer spring 84.
  • Eight packing members 86 are riveted to each of the support plates 24,26. Each packing member 86 fits between two of the carrier windows 46 and is shaped such that its edges 88 coincide with the ends 56,58 of the carrier windows 46. The packing members 86 are in frictional contact with the side plates 4 ⁇ , 42.
  • the buffer 63 contacts the abutment surface 70.
  • the buffer 68 then acts as an auxiliary resilient means and further rotation is against the force of the springs 80,82,84 and the buffer 68. This increases the torque required for further rotation. If enough torque is applied the stops 60 come into contact (as shown in dotted outline in Fig 2) preventing further rotation. In the embodiment shown, the total possible rotation in either direction is 7.5 degrees.
  • Rotation of the carrier 14 relative to the side plates is also damped by friction between the packing members 86 and the side plates 4 ⁇ , 42.
  • the second embodiment differs form the first in that the packing members 86 are replaced by a pair of packing disks 90,92.
  • the packing disks are the same shape and thickness as the support plates 94, 96 but they are countersunk to receive the heads 98 of the rivets 100.
  • the end caps 102, 104 of the second embodiment are identical to each other. Instead of the stud 64 in the first embodiment, each end cap 102,104 has a hole 106 and the buffer 108 has a stud 110 for inserting in the hole in one end cap 104.
  • the buffer 108 is also glued onto the end cap 104.
  • the buffer can be attached to the end cap 104 by glue only, so that the holes 106 in the end caps 102,104 and the stud 110 on the buffer 108 are not needed.
  • Fig 9 shows the estimated torque characteristics of the driven plate assembly of the first embodiment of the invention.
  • the first stage a represents the torque provided by the springs before the buffers come into operation at a rotation of 6.25. Thereafter the buffers provide extra torque.
  • Curve b shows the characteristic for buffers made of Hytrel b4 ⁇ 75 and b shows the characteristic for buffers of Hytrel 6346.
  • the springs alone provide a torque equal to the maximum engine torque, the buffers only coming into operation to smooth out irregularities in the torque applied to the driven plate.
  • the main resilient means could be made from elastomeric material.

Landscapes

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

Abstract

A clutch driven plate comprises twin hub flanges (40, 42) with a carrier plate (14) mounted for rotation relative thereto. A pair of end caps (50, 52) is mounted in aligned windows in the flanges (40, 42) and carrier plate (14). Two pairs of concentric springs (82, 84) are mounted, side by side, between the end caps (50, 52) to resist rotational movement between the flanges (40, 42) and the carrier plate (14).

Description

TORSIONAL VIBRATION DAMPER
The present invention relates to torsional vibration dampers and in particularly to torsional vibration dampers suitable for use in a friction clutch.
The present invention aims to provide a torsional vibration damper having a high torsional stiffness.
The present invention provides a torsional vibration damper comprising a driving member and a driven member mounted for rotation relative thereto, first and second end caps mounted on the members, and resilient means interposed between the end caps to resist said relative rotation, the resilient means comprising two resilient members mounted side by side. The resilient members may be at substantially the same distance from the axis of the damper.
Preferably the torsional vibration damper further comprises auxiliary resilient means interposed between the end caps and acting to resist said relative rotation after a predetermined initial rotation.
Preferably the torsional vibration damper further comprises stop means which limits movement of the end caps against the auxiliary resilient means.
Conveniently one end cap has a projection, the auxiliary resilient means being mounted on the projection. Optionally the end cap has a stud and the auxiliary resilient means has a hole therein for mounting it on the stud.
Preferably the end cap has a hole therein and the auxilary resilient means has a stud thereon for engagement with the hole.
In a preferred embodiment the torsional vibrational damper further comprises a packing member between the driving member and the driven member the packing member being frictionally rotatable relative to the driving member or the driven member.
Optionally the torsional vibrational damper comprises a plurality of packing members circumferentially spaced around the damper.
The packing member or members may be mounted on the driving member.
Preferred embodiments of the present invention will now be described by way of example only with reference to the accompanying drawings in which :-
Fig 1 is a section through a clutch driven plate assembly including a torsional vibration damper according to a first embodiment of the present invention;
Fig 2 is a view of the assembly of fig 1 without the side plates and hub;
Fig 3 is a view of a side plate of the assembly of fig 1; Fig 4 is an enlarged view of one of the end caps of fig
1;
Fig 5 and Fig 6 are views of an elastomeric buffer of the assembly of Fig 1,
Fig 7 is a section through a clutch driven plate assembly including a torsional vibration damper according to a second embodiment of the invention,
Fig 8 is a view, similar to Fig 2 , of the assembly of Fig 7, nd
Fig 9 is a graph showing the torque characteristic of the a s embly of Figs 1 to 6. Referring to Fig 1, a clutch driven plate comprises a driven member in the form of a hub 10 having a radially extending hub flange 12.
A driving member in the form of an annular carrier plate 14 has a central aperture 15.
Two annular friction facings 18,20 are mounted one on either side of an outer region 22 of the carrier plate 14. Two annular support plates 24,26 are mounted one on either side of an inner region 28 of the carrier plate 14. The central apertures 30 of the support plates 24,26 are the same size as the central aperture 16 of the carrier plate 14. The carrier plate 14 is fitted over the flange 12 so that it is rotatable relative to the flange.
Two annular side plates 40,42 as shown in Fig 3 are mounted one on either side of the hub flange 12. The side plates 40,42 are secured to the hub flange 12 by rivets 44 and extend radially outwards on either side of the carrier plate 14.
The carrier plate 14 and support plates 24,26 each have eight apertures which are aligned to form carrier- windows 46. The side plates 40,42 each have eight side Plate windows 48 which are aligned with the carrier windows 46.
Referring to Fig 2 a pair of end caps 50,52 is mounted in each carrier window 46. Each end cap 50,52 comprises a back plate 54 which rests against a respective end 56,58 of one of the carrier windows 46, a stop 60 protruding from the back plate 54 near it:: radially outer end 62, and an end cap projection 63 protruding from the back plate near its radially inner end 66. A stud 64 protrudes from one end cap projection 63 (shown in fig 4), and a buffer 68, having a hole 67 therein, (shown in fig 5) is mounted on the stud such that it extends beyond the end of the stud. In this embodiment the buffer is of elastomeric material. On the other end cap 50, an abutment surface 70 is formed opposite the buffer 68.
Four lugs 72, (see figs 1 and 3) one on either side of each end cap 50,52, extend out through opposite side plate windows 48 and rest against the ends 73, 74 of the side plate windows 43. A spring mounting 76 protrudes from each lug 72.
A pair of helical springs 80 is mounted on each pair of opposite spring mountings 76. Each pair of springs 80 comprises an inner spring 82 and an outer spring 84.
Eight packing members 86 are riveted to each of the support plates 24,26. Each packing member 86 fits between two of the carrier windows 46 and is shaped such that its edges 88 coincide with the ends 56,58 of the carrier windows 46. The packing members 86 are in frictional contact with the side plates 4∅, 42.
In operation, rotation of the carrier plate 14 relative to the hub 10 and side plates 4∅, 42 causes one end 56 of the carrier window 46 to move towards the opposite end 74
of the side plate window 48. This urges the two end caps 50,52 together against the force of the springs 80,82,84 which act as main resilient means. After further rotation the buffer 63 contacts the abutment surface 70. The buffer 68 then acts as an auxiliary resilient means and further rotation is against the force of the springs 80,82,84 and the buffer 68. This increases the torque required for further rotation. If enough torque is applied the stops 60 come into contact (as shown in dotted outline in Fig 2) preventing further rotation. In the embodiment shown, the total possible rotation in either direction is 7.5 degrees.
Rotation of the carrier 14 relative to the side plates is also damped by friction between the packing members 86 and the side plates 4∅, 42.
Referring to Figs 7 and 8, the second embodiment differs form the first in that the packing members 86 are replaced by a pair of packing disks 90,92. The packing disks are the same shape and thickness as the support plates 94, 96 but they are countersunk to receive the heads 98 of the rivets 100. The end caps 102, 104 of the second embodiment are identical to each other. Instead of the stud 64 in the first embodiment, each end cap 102,104 has a hole 106 and the buffer 108 has a stud 110 for inserting in the hole in one end cap 104. The buffer 108 is also glued onto the end cap 104. The buffer can be attached to the end cap 104 by glue only, so that the holes 106 in the end caps 102,104 and the stud 110 on the buffer 108 are not needed.
Fig 9 shows the estimated torque characteristics of the driven plate assembly of the first embodiment of the invention. The first stage a represents the torque provided by the springs before the buffers come into operation at a rotation of 6.25. Thereafter the buffers provide extra torque. Curve b shows the characteristic for buffers made of Hytrel b4∅75 and b shows the characteristic for buffers of Hytrel 6346. The springs alone provide a torque equal to the maximum engine torque, the buffers only coming into operation to smooth out irregularities in the torque applied to the driven plate.
As an alternative to the helical springs the main resilient means could be made from elastomeric material.

Claims

1) A torsional vibration damper comprising a driving member and a driven member mounted for rotation relative thereto, first and second end caps mounted on the members, and resilient means interposed between the end caps to resist said relative rotation, the resilient means comprising two resilient members mounted side by side.
2) A torsional vibration damper according to Claim 1 further comprising auxiliary resilient means interposed between the end caps and acting to resist said relative rotation after a predetermined initial rotation.
3) A torsional vibration damper according to Claim 2 further comprising stop means which limits movement of the end caps against the auxiliary resilient means.
4) A torsional vibration damper according to Claim 3 wherein the stop means includes two opposed stops, one on each end cap.
5) A torsional vibration damper according to any one of Claims 2 to 4 wherein one end cap has a projection, the auxiliary resilient means being mounted on the projection.
6) A torsional vibration damper according to any one of Claims 2 to 5 wherein the end cap has a stud and the auxiliary resilient means has a hole therein for mounting it on the stud.
7) A torsional vibration damper according to any one of claims 2 to 6 wherein the end cap has a hole therein and the auxiliary resilient means has a stud thereon for engagement with the hole.
8) A torsional vibration damper according to any foregoing claim further comprising a packing member between the driving member and the driven member, the packing member being frictionally rotatable relative to the driving member or the driven member.
9) A torsional vibration damper according to Claim 8 wherein the packing member comprises a disk having windows therein.
10) A torsional vibration damper according to Claim 8 comprising a plurality of packing members circumferentially spaced around the damper.
11) A torsional vibration damper according to any one of Claims 8 to 10 wherein the packing member or members is or are mounted on the driving member.
12) A torsional vibration damper substantially as hereinbefore described with reference to the accompanying drawings.
PCT/GB1991/000535 1990-06-22 1991-04-05 Torsional vibration damper WO1992000470A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9013974.2 1990-06-22
GB9013974A GB2245336A (en) 1990-06-22 1990-06-22 Torsional vibration damper

Publications (1)

Publication Number Publication Date
WO1992000470A1 true WO1992000470A1 (en) 1992-01-09

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ID=10678063

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1991/000535 WO1992000470A1 (en) 1990-06-22 1991-04-05 Torsional vibration damper

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WO (1) WO1992000470A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2273757A (en) * 1992-12-22 1994-06-29 Fichtel & Sachs Ag Clutch plate with double-row torsion damper
FR2737546A1 (en) * 1995-08-02 1997-02-07 Fichtel & Sachs Ag CLUTCH DISC
GB2340579A (en) * 1998-08-12 2000-02-23 Mannesmann Sachs Ag Torsional vibration damper
WO2007120088A1 (en) * 2006-04-19 2007-10-25 Volvo Lastvagnar Ab A torsional vibration damper hub for a vehicle clutch

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19745053A1 (en) * 1997-10-11 1999-05-06 Mannesmann Sachs Ag Clutch disc for automotive clutches
JP6213839B2 (en) * 2014-09-19 2017-10-18 本田技研工業株式会社 Damper device for internal combustion engine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3479906A (en) * 1967-04-12 1969-11-25 Gen Motors Corp Tuned friction damper
EP0047583A1 (en) * 1980-09-10 1982-03-17 Automotive Products Public Limited Company Friction clutch driven plates
GB2090372A (en) * 1980-12-22 1982-07-07 Daikin Mfg Co Ltd Damper disc

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB394157A (en) * 1932-08-06 1933-06-22 Woerner Autoteile Heinrich Improvements in rotary shock absorbers for torque transmission
US3101600A (en) * 1962-02-12 1963-08-27 Borg Warner Vibration dampeners
IT713498A (en) * 1962-08-17
AU561285B2 (en) * 1982-10-13 1987-05-07 Daikin Seisakusho K.K. A damper disc

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3479906A (en) * 1967-04-12 1969-11-25 Gen Motors Corp Tuned friction damper
EP0047583A1 (en) * 1980-09-10 1982-03-17 Automotive Products Public Limited Company Friction clutch driven plates
GB2090372A (en) * 1980-12-22 1982-07-07 Daikin Mfg Co Ltd Damper disc

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2273757A (en) * 1992-12-22 1994-06-29 Fichtel & Sachs Ag Clutch plate with double-row torsion damper
GB2273757B (en) * 1992-12-22 1996-01-10 Fichtel & Sachs Ag Clutch plate with double-row torsion damper
FR2737546A1 (en) * 1995-08-02 1997-02-07 Fichtel & Sachs Ag CLUTCH DISC
ES2147057A1 (en) * 1995-08-02 2000-08-16 Fichtel & Sachs Ag Clutch disc assembly with wedges between torsion damping springs
GB2340579A (en) * 1998-08-12 2000-02-23 Mannesmann Sachs Ag Torsional vibration damper
GB2340579B (en) * 1998-08-12 2003-07-02 Mannesmann Sachs Ag Torsional vibration damper for use in the power train of a motor vehicle
WO2007120088A1 (en) * 2006-04-19 2007-10-25 Volvo Lastvagnar Ab A torsional vibration damper hub for a vehicle clutch
US8087508B2 (en) 2006-04-19 2012-01-03 Volvo Lastvagnar Ab Torsional vibration damper hub for a vehicle clutch

Also Published As

Publication number Publication date
GB2245336A (en) 1992-01-02
GB9013974D0 (en) 1990-08-15

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