GB2144810A - Friction clutch - Google Patents
Friction clutch Download PDFInfo
- Publication number
- GB2144810A GB2144810A GB08411452A GB8411452A GB2144810A GB 2144810 A GB2144810 A GB 2144810A GB 08411452 A GB08411452 A GB 08411452A GB 8411452 A GB8411452 A GB 8411452A GB 2144810 A GB2144810 A GB 2144810A
- Authority
- GB
- United Kingdom
- Prior art keywords
- friction clutch
- flange
- pulse transmitter
- clutch according
- pressure plate
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
- F02P7/06—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle
- F02P7/061—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle pick-up devices without mechanical contacts
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D13/00—Friction clutches
- F16D13/58—Details
- F16D13/70—Pressure members, e.g. pressure plates, for clutch-plates or lamellae; Guiding arrangements for pressure members
- F16D13/71—Pressure members, e.g. pressure plates, for clutch-plates or lamellae; Guiding arrangements for pressure members in which the clutching pressure is produced by springs only
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D13/00—Friction clutches
- F16D13/58—Details
- F16D13/70—Pressure members, e.g. pressure plates, for clutch-plates or lamellae; Guiding arrangements for pressure members
- F16D2013/706—Pressure members, e.g. pressure plates, for clutch-plates or lamellae; Guiding arrangements for pressure members the axially movable pressure plate is supported by leaf springs
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
A friction clutch comprises an annular pulse transmitter (22) having a plurality of pulse transmitting elements (23, 24) affixed to that side of the tunnel-like openings (20) of the housing (2) which is remote from the pressure plate (8) for the determination of the necessary parameters for the operation of a motor vehicle internal combustion engine on the flywheel (9) of which the friction clutch can be mounted. The pulse transmitter is reinforced or additionally braced between the openings (20) to avoid vibration thereof. <IMAGE>
Description
SPECIFICATION
Friction clutch
The invention relates to a friction clutch, especially for motor vehicles, with a diaphragm spring which on the one hand is supported against a component part, such as a housing, and on the other hand acts against a pressure plate, the housing being of cup-like or cap-like form and having at least over a portion of its circumference a flange-like rim which contains a plurality of tunnel-like passages extending axially away from the pressure plate, on the side of which passages remote from the pressure plate there is secured an annular pulse transmitter having a plurality of pulsetransmitting elements.
With the aid of the annular pulse transmitter attached to such a friction clutch, various parameters, which are necessary, in the case of any particular application, for the reliable operation of the motor vehicle l.C. engine, on the flywheel of which the clutch is mounted, can be detected by means of one or more scanners or receivers and, if necessary, can be corrected, or operating functions which are subject to these parameters can be introduced and/or adjusted or corrected. With a pulse transmitter so arranged it is possible inter alia, for example to determine the instanteous speed of the l.C. engine as well as the ignition point or other paramters, so that inter alia a correction or adjustment of the ignition point and/or of the fuel feed which may be necessary in dependence upon the operating conditions is possible.Thus, for example, in the case of I.C. engines fitted with fuel injection pumps, both the quantity of fuel injected and also the injection period can be determined in a particularly simple manner in dependence on the operating conditions of the l.C. engine.
In the prior friction clutch of the kind initially referred to, which however is not well known, the annular pulse transmitter is secured by means of riveted connections to three tunnel-like passages distributed around the circumference of the clutch housing and are provided for the reception of the leaf springs which connect the pressure plate to the clutch housing. Such a method of attaching the pulse transmitter is not, however, satisfactory in many cases, since in view of the vibrations or oscillations which occur during the use of a motor vehicle, the pulse transmitter likewise begins to oscillate between the points of attachment, so that the measurements are affected or falsified, and furthermore the pulse transmitter may be destroyed by fatigue fractures.
The basic object of the present invention is to provide a construction or fixing for pulse transmitters attached to friction clutches which reliably withstands oscillations or vibrations and hence also fatigue fractures, while at the same time a national and economical construction of the friction clutch is maintained.
This is achieved according to one constructional form of the invention, in friction clutches of the kind intiially referred to, in that the annular pulse transmitter has a reinforcement formed thereon at least between the positions at which it is secured to the tunnellike passages.
The provision of such a reinforcement makes it possible to vary the cross-section of the annular pulse transmitter at least in particular regions in a particularly simple manner and hence to influence the moment of inertia or moment of resistance against bending, so that the oscilltory mode of the pulse transmitter is also varied.
It may be advantageous, especially in the case of pulse transmitters which have the pulse-transmitting elements in the region of their outer edges, for the pulse transmitter to have, radially inwardly of the pulse-transmitting elements, a profiling which extends in the direction away from the pressure plate and which may extend over the entire circumference of the pulse transmitter. Such a profiling may advantageously be formed by an angularly bent part provided on the inner edge of the pulse transmitter. For many applications, it may be of advantage if the profiling is formed by an angularly bent part having a number of angular bends. The last-mentioned arrangement may be particularly advantageous for shifting natural frequency of the annular pulse transmitter to a range which lies outside the normal speed range of the internal combustion engine.
According to another constructional form of the invention, the basic object of the invention is achieved in that the annular pulse transmitter has between its points of attachment to the tunnei-like passages a further support which is supported on the flange-like rim. By means of this arrangment, the unsupported length of the pulse transmitter between its points of attachment to the tunnel-like passages is reduced and the oscillating characteristic of the pulse transmitter improved.
It may be particularly advantageous if such a further support is formed by a riveted joint bridging the clearance between the flange of the housing and the plane of the pulse transmitter. Such a riveted joint may be constituted in a particularly advantageous manner by a spacing bolt which extends in the axial direction of the friction clutch, the said bolt being riveted at one of its ends to the flange and at the other end to the pulse transmitter.
According to another constructional variant, it may be advantageous if the further support is constituted by at least one supporting element extending from the annular pulse transmitter in the direction towards the flange and resting upon the latter. Such a supporting element may, in a particularly advantageous manner, be formed as an integral component part of the annular pulse-transmitter, in that it is, for example, stamped out of sheet metal in one piece with the pulse transmitter.
In order to suppress oscillation of the pulse transmitter in the axial direction of the friction clutch, it may be particularly advantageous if the annular pulse transmitter is so formed that, after it has been secured to the cup-like or cap-like housing of the friction clutch, the supporting elements bear on the flange with a prestressing force acting in the direction towards the said flange. Such a prestressing force or prestress may be produced in a particularly advantageous manner by forming operations performed in the axial direction on the pulse transmitter or on the pulse-transmitt- ing elements which are formed integrally therewith.
In order to suppress an oscillation of the pulse transmitter, it may moreover be expedient if the supporting element is rigidly connected to the flange, e.g. by being welded or riveted to the said flange.
The invention will now be described in greater detail by way of example with reference to Figures 1 to 7, in which
Figure 1 shows in elevation a friction clutch with the annular pulse transmitter affixed to it,
Figure 2 shows a section according to the line ll-ll of Figure 1,
Figure 3 shows a section according to the line Ill-Ill of Figure 1,
Figures 4 to 7 show further possible arrangements of the invention.
The friction clutch shown in Figures 1 to 3 consists of a housing 2 fixed to the flywheel 9 of an internal combustion engine, to which housing an annular pulse transmitter 3 is attached, and furthermore of a diaphragm spring 4 with radially inwardly directed tongues 5 which are engaged by an actuating device (not specifically shown) for operating the friction clutch.The diaphragm spring 4 is supported at its radially outer part, as viewed circumferentially against abutment zones 6 of the housing 2 and radially further inwards against projections 7 on an axially movable pressure plate 8 and consequently urges this pressure plate in the direction towards the fly wheel 9 to which the friction clutch 2 is affixed, so that the friction linings 10 of the friction disk 11, which is radially fixed with respect to, but axially slidable on, a gear shaft (not shown), are clamped between the flywheel 9 and the pressure plate 8.
The tongue transmission between the pressure plate and the housing takes place via leaf spring elements 1 2 which on the one hand are connected via rivets 14 to projections 1 3 on the pressure plate 8 and on the other hand via rivets 1 5 to the housing 2. The clips 16, which serve as the abutment and withdrawal means, are affixed at the same time by means of the rivets 1 4. These clips 1 6 extend radially inwards from their fixing point to that side of the diaphragm spring which faces towards the housing and engage in spaced relationship over the outer margin 4a of the diaphragm spring and form abutment zones 1 7 opposite the said outer margin.Radially further inwards the clips 1 6 have a withdrawal abutment 1 8 by means of which a positive withdrawal of the pressure plate is effected when the clutch is disengaged.
The housing 2 of the friction clutch 1 has a caplike or cup-like or plate-like region 2a which is adjoined on the radially outer side by a flange-like rim 2b which extends circumferentially of the cover 2.
The flange-iike rim 2b, considered circumferentially of the housing 2, provides a series of abutment surfaces 1 9 for attachment to the flywheel 9 and a series of tunnel-like radial passages 20, into which the projections 1 3 of the pressure plate 8 extend and within which the circumferentailly or tangentially extending leaf springs 1 2 are accommodated.
The annular pulse transmitter 3 is supported on the side of the housing 2 remote from the pressure plate 8 in the region of the tunnel-like openings 20 and is fixed there by riveting 21. On its radially outer margin the pulse transmitter 3 has a plurality of pulsetransmitting elements 22 which are integral with the annular basic body 3a of the pulse transmitter 3 and are formed by raised parts projecting axially from the marginal region of the basic body 3a and consisting of torgues 23,24 which are respectively formed on the radially outer edge of the basic body 3a and cut out of the interior of the latter. The torgues are moreover so arranged that each radially outer torgue 23 lies opposite a torgue 24 which is located radially further inward.As can be seen from Figure 1, the pulsetransmitting elements 22 formed by the torgues 23,24 are distributed uniformly over the circumference of the pulse transmitter 3 and form two groups which are separated by the omission of the pulse-transmitting elements 22 and torgues 23,24 in the regions 25.
In the embodiment show, the pulsetransmitting elements 22 are uniformly distri bu-ted over the circumference as well as being of the same shape. For certain applications or purposes, however, the pulse-transmitting elements 22 may instead be distributed irregularly over the circumference or form groups of elements 22 that are distributed irregularly over the circumference, and elements 22 or groups of elements 22 of different kinds may be provided for producing different kinds of signals or pulses.
The annular pulse transmitter 3 has, moreover, radially inwardly of the pulse transmitting elements 22, in the region of its radially inner edge, a profiling constituted by an angularly bent flange 26 which stiffens the annular basic body 3a of the pulsetransanitter 3. The angularly bent flange 26 causes the amplitudes of the axial oscillations, that occur in the self-supporting regions 27 between the positions at which the pulse transmitter 3 is fixed to the housing 2, to be reduced to an acceptable magnitude or causes the oscillations to be suppressed. These oscillations are attributable predominantly to exciting frequencies which are produced by the internal combustion engine on which the friction clutch is mounted.Furthermore, the cross-section and hence also the moment of inertia or of resistance of the pulse transmitter 3 is altered by the angularly bent flange 26 so that the nature of its oscillations is influenced and consequently, by suitably forming the said flange the critical natural frequency of oscillation of the pulse transmitter can be fixed at a value outside the speed range of the internal combustion engine.
The cross-section of another constructional form of an annular pulse transmitter 103, is shown in Figure 4. The pulse transmitter 103 has on its outer circumference pulse-transmitting elements 22 and has on its inner edge a reinforcement 1 26 which is constituted by a profiling formed by a multi-angled portion.
The reinforcement 1 26 has, considered in cross-section, a limb 1 26a extending at least approximately parallel to the axis of the friction clutch, as well as a limb 1 26b extending at least approximately at right angles to the said limb 126a.
Figure 5 shows a further constructional form in which the annular pulse transmitter 203 has, between the parts thereof which are connected to the tunnel-like openings 20 of the housing 2, a further support 28 on the flange-like rim 2b. The disposition of this further support 28 is shown in chain-dotted lines in Figure 1. The support 28 is formed by a spacing bolt which extends in the direction of the axis of the friction clutch 1 and is connected at one of its ends with the annular pulse transmitter 203 and at the outer end to the flange-like rim 2b via rivets 28a,28b.
The annular pulse transmitter 303 shown in crosssection in Figure 6 has supporting elements 1 28 on its outer edge. The supporting elements 1 28 are constituted by tongues 1 28 which are formed integrally with the annular pulse transmitter 303, extend in the axial direction of the friction clutch and are supported on the flange-like rim 2b of the housing 2. The supporting elements 1 28 are, like the spacing bolts 28 according to Figure 5, also located between the positions at which the annular pulse transmitter is connected to the tunnel-like openings of the housing.
The supporting elements 1 28 are secured to the flange-like rim 2b of the housing 2 by means of a welded joint 29.
According to another constructional form which is shown in Figure 7, the supporting elements 1 28 have, at the ends thereof that face towards the flange-like rim 2b. a tongue 1 28a which rests upon the flange-like rim 2b and is fixed by a riveted connection 30 to the said rim 2b.
According to a further constructional form, the welded connection 29 according to Figure 6 between the individual supporting elements 128 and the flange-like rim 2b is dispensed with and the supporting elements 1 28 are only resiliently supported on the flange-like rim 2b of the housing 2. The resilient loading force with which the supporting elements 1 28 bear upon the flange-like rim 2b is produced by a forming operation applied to the annular pulse transmitter in the axial direction.
As is shown in chain-dotted lines in Figures 5 and 6, the annular pulse transmitters 202 and 203 may also have an additional reinforcement 226 and 326 formed thereon.
Claims (14)
1. Friction clutch, especially for motor vehicles, with a diaphragm spring which is supported against a component part, such as a housing, and acts against a pressure plate, the housing being cup-like or cap-like form and having at least over a portion of its circumference a flange-like rim which contains a plurality of tunnel-like passages extending axially away from the pressure plate, on the side of which passages remote from the pressure plate there is secured an annular pulse transmitter having a plurality of pulsetransmitting elements, characterised in that the annular pulse transmitter (3,103,203,303) has a reinforcement (26,126,226,326) formed thereon at least between the positions (21) at which it is secured to the tunnel-like passages (20).
2. Friction clutch according to claim 1, characterised in that the pulse transmitter (3,103,203, 303) has, radially inwardly of the pulse-transmitting elements (22), a profiling (26,126,226,326) extending in the direction away from the pressure plate (8).
3. Friction clutch according to claim 2, characterised in that the profiling (26,126,226,326) is an angularly bent part.
4. Friction clutch according to one of claims 1 to 3, characterised in that the profiling (126) is an angularly bent part having a plurality of angular bends.
5. Friction clutch, especially for motor vehicles, with a diaphragm spring which is supported against a component part, such as a housing, and acts against a pressure plate, the housing being of cup-like or cap-like form and having at least over a portion of its circumference a flange-like rim which contains a plurality of tunnel-like passages extending axially away from the pressure plate, on the side of which passages remote from the pressure plate an annular pulse transmitter is secured, characterised in that the annular pulse transmitter (203,303) has between the points of attachment thereof to the tunnel-like passages (20) a further support (28, 128) which is supported on the flange-like rim.
6. Friction clutch according to one of claims 1 to 5, characterised in that the further support is formed by a riveted joint (28) bridging the clearance between the flange (2b) and the plane of the pulse transmitter (203).
7. Friction clutch according to one of claims 1 to 5, characterised in that the further support (128) is formed by at least one supporting element (1 28) extending from the annular pulse transmitter (303) in the direction towards the flange (2b) and resting upon the latter.
8. Friction clutch according to claim 7, characterised in that the supporting element (128) is an integral component part of the annular pulse transmitter (303).
9. Friction clutch according to one of claims 5 to 8, characterised in that the supporting element (128) bears on the flange (2b) with a prestressing force acting in the direction towards the said flange.
10. Friction clutch according to claim 9, characterised in that the prestress is produced by a forming operation performed on the pulse transmitter (303) in the axial direction.
11. Friction clutch according to one of claims 5 to 10, characterised in that the supporting element (128) is rigidly united with the flange (2b).
1 2. Friction clutch according to claim 11, characterised in that the supporting element (128) is welded (Fig. 6) to the flange (2b).
1 3. Friction clutch according to claim 11, characterised in that the supporting element (128) is riveted (at 30) to the flange (Fig. 7).
14. Friction clutch substantially as described with reference to Figs. 1 to 3 or any of Figs. 4 to 7 of the drawings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3316282 | 1983-05-04 | ||
| DE3347831 | 1983-07-04 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8411452D0 GB8411452D0 (en) | 1984-06-13 |
| GB2144810A true GB2144810A (en) | 1985-03-13 |
| GB2144810B GB2144810B (en) | 1987-03-04 |
Family
ID=25810525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08411452A Expired GB2144810B (en) | 1983-05-04 | 1984-05-04 | Friction clutch |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE3416316A1 (en) |
| GB (1) | GB2144810B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4934501A (en) * | 1988-05-06 | 1990-06-19 | Valeo | Power transmission with a clutch unit having shaft speed measuring means |
| US5518100A (en) * | 1992-12-07 | 1996-05-21 | Luk Lamellen Und Kupplungsbau Gmbh | Apparatus for compensating for fluctuations of torque |
| GB2305223A (en) * | 1995-09-13 | 1997-04-02 | Fichtel & Sachs Ag | Friction clutch equipped with a pulse generator providing speed indicative signals |
| EP0780588A1 (en) * | 1995-12-20 | 1997-06-25 | Valeo | Clutch unit comprising a slitted target ring |
| EP0780589A1 (en) * | 1995-12-20 | 1997-06-25 | Valeo | Clutch unit comprising a cover which is mounted on a supporting flange by means of transverse legs |
| US5868232A (en) * | 1995-08-24 | 1999-02-09 | Exedy Corporation | Clutch apparatus having a vibration dampensing mechanism, a reduced axial thickness and an undulated spring disposed within the vibration dampening mechanism |
| US6491151B1 (en) * | 1999-08-30 | 2002-12-10 | Mannesmann Sachs Ag | Friction clutch |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19813594B4 (en) * | 1998-03-27 | 2006-06-01 | Volkswagen Ag | Method for producing a two-piece donor wheel |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2151171A1 (en) * | 1971-10-14 | 1973-04-19 | Bosch Gmbh Robert | ELECTRIC SIGNAL GENERATOR |
| DE2658744A1 (en) * | 1976-12-24 | 1978-07-06 | Luk Lamellen & Kupplungsbau | Vehicle clutch leaf spring attachment - includes two sets of rivets or screws with friction rings around one set |
| FR2475228A1 (en) * | 1980-01-31 | 1981-08-07 | Renault | Target for rotational speed detector - comprises U=section ring attached to wheel circumference passing electromagnetic detector |
-
1984
- 1984-05-03 DE DE19843416316 patent/DE3416316A1/en active Granted
- 1984-05-04 GB GB08411452A patent/GB2144810B/en not_active Expired
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4934501A (en) * | 1988-05-06 | 1990-06-19 | Valeo | Power transmission with a clutch unit having shaft speed measuring means |
| US5518100A (en) * | 1992-12-07 | 1996-05-21 | Luk Lamellen Und Kupplungsbau Gmbh | Apparatus for compensating for fluctuations of torque |
| US5868232A (en) * | 1995-08-24 | 1999-02-09 | Exedy Corporation | Clutch apparatus having a vibration dampensing mechanism, a reduced axial thickness and an undulated spring disposed within the vibration dampening mechanism |
| US5992596A (en) * | 1995-08-24 | 1999-11-30 | Exedy Corporation | Clutch apparatus having a vibration dampening mechanism, a reduced axial thickness and an undulated spring disposed within the vibration dampening mechanism |
| GB2305223A (en) * | 1995-09-13 | 1997-04-02 | Fichtel & Sachs Ag | Friction clutch equipped with a pulse generator providing speed indicative signals |
| US5732810A (en) * | 1995-09-13 | 1998-03-31 | Fichtel & Sachs Ag | Friction clutch with a pulse generator |
| GB2305223B (en) * | 1995-09-13 | 1999-08-11 | Fichtel & Sachs Ag | Friction clutch equipped with a pulse generator providing speed indicative signals |
| EP0780588A1 (en) * | 1995-12-20 | 1997-06-25 | Valeo | Clutch unit comprising a slitted target ring |
| EP0780589A1 (en) * | 1995-12-20 | 1997-06-25 | Valeo | Clutch unit comprising a cover which is mounted on a supporting flange by means of transverse legs |
| FR2742827A1 (en) * | 1995-12-20 | 1997-06-27 | Valeo | CLUTCH MODULE WHOSE COVER IS FIXED TO A SUPPORTING FLANGE BY TRANSVERSE BRACKETS |
| FR2742825A1 (en) * | 1995-12-20 | 1997-06-27 | Valeo | CLUTCH MODULE HAVING A TARGET DEFINING SLOTS |
| US6491151B1 (en) * | 1999-08-30 | 2002-12-10 | Mannesmann Sachs Ag | Friction clutch |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3416316A1 (en) | 1987-05-07 |
| GB8411452D0 (en) | 1984-06-13 |
| GB2144810B (en) | 1987-03-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 727 | Application made for amendment of specification (sect. 27/1977) | ||
| 727A | Application for amendment of specification now open to opposition (sect. 27/1977) | ||
| 727B | Case decided by the comptroller ** specification amended (sect. 27/1977) | ||
| SPAC | Amended specification published ** copy of the specification now available | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19980504 |