GB2079897A - Mounting clutch plates - Google Patents
Mounting clutch plates Download PDFInfo
- Publication number
- GB2079897A GB2079897A GB8120751A GB8120751A GB2079897A GB 2079897 A GB2079897 A GB 2079897A GB 8120751 A GB8120751 A GB 8120751A GB 8120751 A GB8120751 A GB 8120751A GB 2079897 A GB2079897 A GB 2079897A
- Authority
- GB
- United Kingdom
- Prior art keywords
- friction
- flange
- side plates
- hub
- hub member
- 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- Withdrawn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
- 238000013016 damping Methods 0.000 claims abstract description 36
- 239000002184 metal Substances 0.000 claims description 4
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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
- F16F15/129—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
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 friction-clutch driven plate comprises a hub member 11 having a radial flange 13 and a friction-disc carrier incorporating two side plates 21 and 22 rivetted to each other at 23. Relative axial movement between the friction disc carrier and hub member is controlled by coil springs 26 in windows 14, 24 and 25. Friction damping of this relative movement is provided externally of the side plates by means of an annular corrugated spring 34 urging side plate 21 into frictional engagement with a boss 16 of flange 13 and reacted either by a support disc 31 held by a circlip 32 in groove 33 or by a plate 131 held by an interference fit. The axial loading of the friction device is readily adjustable without dismantling major components such as the side plates. <IMAGE>
Description
SPECIFICATION
Friction clutch driven plate
The invention relates to driven plates for friction clutches. A typical friction-clutch driven plate comprises a hub member having a radial flange, a friction-disc carrier incorporating two side plates secured to each other and spaced one to each side of the radial flange for limited angular movement with respect to the hub member, and friction damping means and circumferentially acting resilient means operative between the flange and the side plates to control said angular movement and damp out torsional vibrations.
It is important that the degree of friction damping is matched accurately to the characteristics of the engine and transmission with which the clutch is to be used so the amount of friction damping must be controlled within close limits during manufacture of the driven plate.
It is conventional to provide the friction damping by inserting a bellevilie spring between one side plate and the flange to load the two parts of the driven plate, i.e., the hub member and the carrier axially with respect to each other. Washers of friction material are often arranged between the two parts of the driven plate but metal to metal contact can be employed if required. A problem with the. conventional arrangements is that the spring loading varies quite substantially in response to small variations in the distance between the two side plates and this distance is subject to tolerance build up so that it is difficult to control accurately. The result is that many clutch driven plates which are manufactured do not meet the specifications for friction damping.In order to correct the degree of friction damping it is necessary completely to dismantle the driven plate to gain access to the friction damping elements between the side plates.
An object of the invention is to provide a friction-clutch driven plate in which friction damping is provided between two parts thereof in such a way that the degree of friction damping can be controlled accurately.
According to the invention a friction clutch driven plate comprising a hub member having a radial flange, a friction disc carrier incorporating two side plates secured to each other and spaced one to each side of the radial flange for limited angular movement with respect to the hub member and friction damping means and circumferentially acting resilient means operative between the flange and the side plates to control said angular movement and damp out torsional vibrations is characterised in that the friction damping means comprises an axially operating damping spring acting on the outer face of one side plate to urge the side plate into frictional engagement with the flange (or with a friction washer supported by the flange) and reacted by a stop carried by the hub externally of said side plates the load of the damping spring being adjustable to permit adjustment of the friction damping without dismantling the hub member and friction disc carrier.
Preferably the stop is readily removable without separating the side plates from each other.
Preferably the effective position of the stop is axially adjustable. The stop may comprise a circlip arranged in a groove in the hub member in which case effective adjustment of the axial position of the stop is provided by substituting circlips of varying thicknesses or by shims. Aiternatively, the stop may comprise a sheet metal sleeve having a flange which is an interference fit on the hub member and is axially adjustable by sliding it along the hub member.
Embodiments of the invention will now be described with reference to the accompanying drawings in which:
Figure 1 is a diagrammatic cross section through a driven plate according to the invention; and
Figure 2 is a view corresponding to part of
Figure 1 showing a modification.
The friction clutch driven plate comprises a hub member 11 which is splined at 12 to enable it to be mounted on and to drive a gearbox input shaft (not shown). The hub incorporates an external flange 1 3 which incorporates a series of circumferentially spaced windows 14 and peripheral notches 1 5. The flange also incorporates a thickened boss 16, the purpose of which will be described.
Two annular side plates 21 and 22 are arranged one to each side of the flange 13. The side plates are spaced apart and joined to each other by means of a series of shouldered rivets 23 which pass through the notches 1 5 with clearance. The side plates have central apertures which engage with portions of the hub to either side of the flange 13 and so centralize the side plates with respect to the hub. The rivets 23 can move circumferentially of the hub within the notches 1 5 to an extent determined by the width of these notches with the result that the rivets and notches provide for limited relative angular movement between the side plates and the hub.
The side plates 21 and 22 each incorporate several windows 24 and 25. The windows 24 and 25 are aligned with each other and are arranged adjacent the windows 14 in the flange 13. A circumferentially acting coil spring 26 is arranged in each set of windows 24, 14, 25. Normally, the springs are in contact with both ends of the windows 24 and 25 but there may be some clearance between the ends of some of the windows 14 and the associated spring 26. In this way, the springs 26 act as circumferentially acting resilient means to control the angular movement between the side plates and the hub. A suitable non-linear spring characteristic can be achieved by selection of springs 26 and the initial clearance between some windows 14 and associated springs.
One of the side plates carries a series of externally directed spring steel segments 27 around its periphery and these segments in turn carry two annular friction facings 28 and 29.
As thus far described, the clutch driven plate is conventional. In use, the friction facings are clamped between an engine flywheei and a clutch pressure plate (not shown) to impart drive to the friction disc carrier constituted by the two side plates. The friction disc carrier in turn drives the hub through the medium of the springs 26. A conventional driven plate would also incorporate friction damping between the hub member and the carrier, interposed between at least one of the side plates and the flange 13.
The novel friction damping means which is provided in the embodiment of Figure 1 will now be described. A damping-spring support disc 31 is arranged on the hub 11 externally of the friction disc carrier and is held in position by a circlip 32 engaged in a circlip groove 33 in the hub. A corrugated annular damping spring 34 is arranged between the support disc 31 and the side plate 21
in such a way that it urges the side plate 21
against the boss 1 6 at the base of the flange 1 3.
Thus, relative rotation of the friction disc carrier
and the hub is controlled by frictional engagement
between the side plate 21 and the boss 16,
between the side plate 21 and damping spring 34,
between damping spring 34 and support disc 31
and between the support disc 31 and circlip 32.
The damping spring support disc 31 incorporates
a lip 35 to provide some protection for the spring
34. The friction damping means is designed to
provide a required amount of friction. Small
variations in various dimensions such as the
thicknesses of circlip 32, support disc 31 and side
plate 21 can result in a friction characteristic
outside the range of permissible values. If an
unsatisfactory friction value is measured during a
test on a newly manufactured driven plate, it is a
simple matter to adjust the friction damping,
without dismantling the hub member and friction
disc carrier, in the following manner. The friction
damping means is dismantled and then re
assembled with one or more different components
to adjust the degree of friction.This adjustment
could be achieved by substitution of a different
spring, by substitution of a circlip 32 or support
disc 35 of slightly different thickness or by the
incorporation of a shim between circlip 32 and
support disc 31. In any event, the adjustment can
be effected without dismantling major parts of the
driven plate. There is also less danger of achieving
an unsatisfactory friction value with the
arrangement of Figure 1 than with a conventional friction damping means. This is because the
relevant dimensions can be controlled accurately.
For example, the circlip groove 33 can be machined at the same time as the friction face of boss 16, ensuring accurate spacing. The other relevant factors are thicknesses of narrow components which can normally be controlled reasonably accurately.
There may be a range of visually distinctive corrugated springs 34, for example with different numbers of corrugations and in that case the spring loading should vary from spring to spring in a regular fashion. This simplifies the task of an operative who has to adjust the friction damping because he can simply count the corrugations on a spring which has been removed and replace it with another spring with more or less corrugationvs as required.
Most of the clutch driven plate of Figure 2 corresponds to that of Figure 1 but two modifications to the friction damping means which could be incorporated together or independently are shown in Figure 2.
One modification is that the thickness of the boss 161 on the flange of the hub has been reduced to accommodate a friction washer 36 between the flange 13 and side plate 21.
The other modification is that in place of circlip 32 and circlip groove 33, the damping spring support disc 131 is in the form of a sleeve having an internal flange 37 which is an interference fit on the hub 11. During assembly, the damping spring support disc is forced on to the hub to a predetermined distance. If the measured friction value is insufficient, it is a simple matter to press the damping spring support disc further on to the hub to increase the friction. If necessary, the support disc can be removed from the hub and replaced in a new position or can be retracted a short distance to reduce the friction.
As a further modification, the corrugated annular spring 34 of either embodiment may be replaced by a belleville washer spring. Also, an additional friction washer may be provided if required between the damping spring and the side plate 21.
Claims (5)
1. Afriction-clutch driven plate comprising a hub member having a radial flange, a friction disc carrier incorporating two side plates secured to each other and spaced one to each side of the radial flange for limited angular movement with respect to the hub member and friction damping means and circumferentially acting resilient means operative between the flange and the side plates to control said angular movement and damp out torsional vibrations, characterised in that the friction damping means comprises an axially operating damping spring (34) acting on the outer face of one side plate (21) to urge said side plate into frictional engagement with the flange (13) (or with a friction washer (36) supported by the flange) and reacted by a stop (31, 32 or 131) carried by the hub externally of said side plate, the load of the damping spring being adjustable to permit adjustment of the friction damping without dismantling the hub member and friction disc carrier.
2. A friction-clutch driven plate as claimed in
Claim 1 wherein the stop is readily removable without separating the side plates from each other.
3. A friction-clutch driven plate as claimed in
Claim 1 or Ciaim 2 wherein the effective position of the stop is axially adjustable.
4. A friction-clutch driven plate as claimed in any preceding claim wherein the stop comprises a circlip arranged in a groove in the hub member.
5. A friction clutch driven plate as claimed in any one of Claims 1 to 3 wherein the stop comprises a sheet metal sleeve having a flange that is an interference fit on the hub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8120751A GB2079897A (en) | 1980-07-04 | 1981-07-06 | Mounting clutch plates |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8022013 | 1980-07-04 | ||
| GB8120751A GB2079897A (en) | 1980-07-04 | 1981-07-06 | Mounting clutch plates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2079897A true GB2079897A (en) | 1982-01-27 |
Family
ID=26276109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8120751A Withdrawn GB2079897A (en) | 1980-07-04 | 1981-07-06 | Mounting clutch plates |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2079897A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| FR2712951A1 (en) * | 1993-11-26 | 1995-06-02 | Fichtel & Sachs Ag | Axially tightened friction ring torsional oscillation damper in a motor vehicle transmission. |
| FR2795789A1 (en) * | 1999-06-29 | 2001-01-05 | Mannesmann Sachs Ag | Friction disc for clutch has friction linings on either side of disc and has hub with monolithically formed flange and drive teeth |
| CN102554572A (en) * | 2011-12-28 | 2012-07-11 | 浙江华信汽车零部件有限公司 | Processing technology for plate hub of driven plate assembly and mould component adopted in the processing technology |
-
1981
- 1981-07-06 GB GB8120751A patent/GB2079897A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| FR2712951A1 (en) * | 1993-11-26 | 1995-06-02 | Fichtel & Sachs Ag | Axially tightened friction ring torsional oscillation damper in a motor vehicle transmission. |
| FR2795789A1 (en) * | 1999-06-29 | 2001-01-05 | Mannesmann Sachs Ag | Friction disc for clutch has friction linings on either side of disc and has hub with monolithically formed flange and drive teeth |
| CN102554572A (en) * | 2011-12-28 | 2012-07-11 | 浙江华信汽车零部件有限公司 | Processing technology for plate hub of driven plate assembly and mould component adopted in the processing technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |