GB2296958A - Clutch assembly and crankshaft attachment means including an adhesive - Google Patents

Clutch assembly and crankshaft attachment means including an adhesive Download PDF

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Publication number
GB2296958A
GB2296958A GB9603054A GB9603054A GB2296958A GB 2296958 A GB2296958 A GB 2296958A GB 9603054 A GB9603054 A GB 9603054A GB 9603054 A GB9603054 A GB 9603054A GB 2296958 A GB2296958 A GB 2296958A
Authority
GB
United Kingdom
Prior art keywords
flywheel
mating surfaces
output end
crankshaft
clutch
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
GB9603054A
Other versions
GB2296958B (en
GB9603054D0 (en
Inventor
Wolfgang Baier
Reinhart Deppert
Jens Schneider
Hilmar Goebel
Andreas Gebauer
Alfred Eusemann
Heiko Schulz-Andres
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.)
ZF Sachs AG
Original Assignee
Fichtel and Sachs AG
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 Fichtel and Sachs AG filed Critical Fichtel and Sachs AG
Priority claimed from GB9405955A external-priority patent/GB2277363B/en
Publication of GB9603054D0 publication Critical patent/GB9603054D0/en
Publication of GB2296958A publication Critical patent/GB2296958A/en
Application granted granted Critical
Publication of GB2296958B publication Critical patent/GB2296958B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • 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
    • 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
    • F16F15/1207—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 the supporting arrangement of the damper unit
    • 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
    • F16F15/30—Flywheels
    • F16F15/315—Flywheels characterised by their supporting arrangement, e.g. mountings, cages, securing inertia member to shaft
    • F16F15/3153—Securing inertia members to the shafts
    • 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
    • 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
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/12—Mounting or assembling

Landscapes

  • 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 clutch assembly comprises a flywheel 7, a clutch pressure plate unit 3 and a clutch plate 5 is secured to the output end 11 of a crankshaft 15 of an internal combustion engine by an adhesive bond between a region of the axially extending mating surfaces 33, 35 and/or a region of the radially extending mating surfaces 51, 53. The axially extending mating surfaces 33, 35 may be dimensioned to provide a sliding fit or press fit. Roll pins 63, for transmitting the grater part of the torque, are inserted into axially aligned bores 59, 61 in the output end 11 and the flywheel 7 respectively. A clamping screw 55 may be provided to axially secure the output end 11 and flywheel 7. The adhesive serves to seal the mating surfaces to prevent corrosion and in its uncured state, during mounting, acts as a lubricant. Flywheel 7 can be removed by using, for example, hydraulically actuated pulling devices acting through threaded bore 57.

Description

MEANS FOR ATTACHING A CLUTCH ASSEMBLY TO A CRANKSHAFT This invention relates to means for attaching an assembly comprising a flywheel, a friction clutch pressure plate unit and a driven clutch plate to an output end of a crankshaft of an internal combustion engine.
Known friction clutches of motor vehicles as a rule comprise a one-part or two-part flywheel onto which a pressure plate unit is detachably screwed. The pressure plate unit includes an axially movable pressure plate which is attached to a clutch housing for rotation with it, but is guided to be axially movable, the clutch housing being screwed to the flywheel, and biased towards the flywheel by a main clutch spring, usually a diaphragm spring. The pressure plate and the flywheel form friction faces for a driven clutch plate which is arranged between them and of which the hub is secured for rotation with, but is axially movable on, an input shaft of a gearbox which follows in the power train of the motor vehicle.
The other face of the flywheel is screwed onto an end flange of the crankshaft of the engine by means of a number of screws distributed around the axis of rotation of the flywheel.
In known friction clutches the clutch plate and the diaphragm spring, looking in an axial direction, overlie the screws which hold the flywheel onto the end flange of the crankshaft. Accordingly, for mounting the friction clutch the flywheel must first be screwed onto the end flange before the clutch plate is put in place and the pressure plate unit screwed onto the flywheel. This method of assembly is not only time-consuming, but has the drawback that the clutch cannot be checked before assembly including the clutch plate and the flywheel, for the maintenance of constructional standards.
From DE-A-41 17 571 it is known to provide both the clutch plate and the diaphragm spring with holes which are aligned axially with the screws provided for attaching the flywheel to the end flange of the crankshaft. In this way the pressure plate unit, the clutch plate and the flywheel can be put together to form a unit (modular clutch) before mounting on the crankshaft. The attachment screws can be screwed into the end flange of the crankshaft through the holes in the clutch plate and the diaphragm spring.
From DE-A-33 15 232 it is known to screw onto the output end of the crankshaft a modular clutch, in which the clutch housing extends over the rim of the flywheel and is therefore not detachably secured to it, being screwed onto the output end of the crankshaft by means of a central screw. The output end of the crankshaft contains a central hole in its face provided with an internal screw thread into which the central screw is screwed. The central screw has a radially projecting flange which clamps the flywheel against the axial end face of the output end of the crankshaft. The central screw is in the form of a hollow screw and contains in addition a pilot bearing which radially guides the end of the gearbox input shaft which projects through the hub of the clutch disc.The torque which is transmitted through the radial flange of the central screw is however comparatively small as only limited tightening torques can be achieved on the central screw.
From DE-A-40 13 298 it is known to attach the flywheel of a modular clutch to the crankshaft by providing the mutually axially facing surfaces of an end flange of the crankshaft and of the flywheel with radially extending splines or teeth (e.g. a Hirth spline) and again to secure the flywheel axially on the output end of the crankshaft by means of a central screw which also contains the pilot bearing for the gearbox input shaft. In this case the central screw only takes care of the axial clamping, whilst the torque is transmitted from the crankshaft to the flywheel by means of the radial splines.The central screw, which is screwed into a central threaded opening in the output end of the crankshaft, is provided in the region of the pilot bearing centrally with keying faces, into which a torque-applying tool can be inserted through the hub of the clutch plate in order to tighten the central screw on the crankshaft.
Finally, it is known from the book by K.
Wiecking and R. Gebauer "The Engines of Passenger Motor Vehicles", Verlag Chr. Belser, Stuttgart, 1952, Page 314, Fig. 341, to secure the flywheel of a known friction clutch onto the output end of the crankshaft by means of a conical press-fit coupling.
The output end carries an external cone which tapers towards the clutch plate and on which an internal conical surface of the hub of the flywheel is fitted.
The output end of the crankshaft terminates in a screwed stub onto which a nut is screwed to retain the flywheel. However, this known construction does not permit the assembly of the pressure plate unit, the clutch plate and the flywheel as a modular clutch.
It is an aim of the invention to provide an arrangement which, using simple means, permits an assembly of the clutch pressure plate unit, the clutch plate and the flywheel, to be secured to the output end of the crankshaft in one step and in a way which allows no radial play between the assembly and the crankshaft. The assembly step should be capable of being carried out very simply.
According to the invention, means for attaching an assembly comprising a flywheel, a friction clutch pressure plate unit and a driven clutch plate to an output end of a crankshaft of an internal combustion engine, comprises an adhesive on substantially axially extending mating surfaces and/or on radially extending mating surfaces of the flywheel and the output end to secure the flywheel to the output end.
This arrangement permits the assembly to be mounted on the output end of the crankshaft in a simple manner, with the flywheel being secured to the crankshaft to provide a significant proportion of the torque-transmitting capacity of the flywheel-crankshaft connection.
The substantially axially extending mating surfaces take care of the radial location of the flywheel on the output end of the crankshaft. The axially extending mating surfaces are preferably cylindrical, so that they allow the radially extending surfaces to be secured by the adhesive.
The cylindrical mating surfaces can be of dimensions suitable for a sliding fit or a press fit, so that they can be employed in addition to the adhesive for transmitting the torque. The adhesive, which is cured after assembly, serves as a lubricant during assembly to reduce the axial forces needed to effect assembly. It also takes care of sealing the mating surfaces in order to prevent fretting corrosion.
The radial mating surfaces preferably extend radially outside the substantially axially extending mating surfaces.
Roll pins may be inserted in axially aligned bores in the output end and the flywheel, in order to transmit torque.
It will be understood that the invention can be employed not only with a one-piece flywheel but also with a two-part flywheel, having two relatively rotatable flywheel masses which are coupled together for resilient relative rotation, one of them being for connection to the crankshaft and the other carrying the pressure plate unit.
An embodiment of the invention is described in conjunction with the accompanying drawings, of which the single figure is a partial axial section through a clutch assembly to the output end of the crankshaft of an internal combustion engine of a motor vehicle.
The figure shows a motor vehicle friction clutch 1, of which the pressure plate unit indicated generally at 3 is combined with a driven clutch plate 5 and a flywheel 7 to form an assembly. The assembly is mounted by attachment means 9 on the output end 11 of a crankshaft 15, rotating about an axis 13, of an internal combustion engine of the motor vehicle. The clutch assembly forms a so-called "modular clutch", in which the pressure plate unit 3, the clutch plate 5 and the flywheel 7 are combined to form the clutch assembly before being mounted on the output end 11 of the crankshaft 15 so that the clutch as a whole can be checked for functioning and for the maintenance of constructional standards.
The pressure plate unit 3 has, in the usual manner, a clutch housing 17 which is secured to the flywheel 7 either detachably or alternatively in a manner which is not detachable in operation, for example by welding. A substantially annular pressure plate 19 is secured to the clutch housing 17, for example by means of tangential leaf springs, not shown, so that it can rotate with the plate but is relatively axially movable. The pressure plate 19 is urged by a diaphragm spring 29 held on the clutch housing 17 towards the flywheel 7 which forms an opposing pressure plate. The clutch plate 5 is coupled in a rotationally resilient manner to a hub 25 in a known manner through a torsional vibration damper 23.The clutch plate 5 is guided by means of its hub 25 to be rotationally secure but axially movable on an input shaft, indicated at 27, of a gearbox which follows the clutch 1 in the torque-transmitting power train.
The diaphragm spring 29 clamps the friction linings 21 frictionally against the flywheel 7 and the pressure plate 19. By means of a withdrawal device, not shown, but acting on spring tongues 31 of the diaphragm spring 29, the pressure plate can be relieved of load and the clutch disengaged.
It will be understood that the friction clutch 1 illustrated represents simply an example of a clutch which can be employed within the scope of the invention. For example, the flywheel 7 could be a so-called "two-part flywheel" comprising two flywheel masses which are rotatable relative to one another about the axis 13 and of which a first one is designed to be mounted on the output end 11 by means of the attachment means 9, whilst the second mass carries the pressure plate unit 3. The two flywheel masses are coupled together in a rotationally resilient manner by means of a torsional vibration damper. In this arrangement the damper 23 can be omitted.
The output end 11 of the crankshaft 15 has a cylindrical central opening 33. This opening 33 is engaged by a cylindrical projection 35 which extends axially from the flywheel 7. The cylindrical internal surface of the opening 33 and the cylindrical external surface of the cylindrical projection 35 form mutually associated mating surfaces which locate the flywheel 7 radially on the output end 11. The output end 11 has a surface 51 extending radially perpendicular to the axis 13, which engages face to face with a radially extending surface 53 of the flywheel 7. The surfaces 51, 53 form radially mating surfaces which locate the flywheel 7 axially relative to the output end 11.The cylindrical mating surfaces of the opening 33 and the cylindrical projection 35, and the radially mating surfaces 51, 53, are secured with adhesive, which transmits the torque from the crankshaft 15 to the flywheel 7. In this arrangement the radial mating surfaces 51, 53 extend radially outside the cylindrical mating surfaces.
To increase the torque transmitting capacity between the cylindrical mating surfaces the opening 33 and the cylindrical projection 35 can be dimensioned to provide a sliding fit or a press fit. The adhesive serves to seal the mating surfaces to prevent corrosion. The adhesive is in its uncured state during the mounting of the clutch assembly on the crankshaft, and so acts as a lubricant, and by virtue of this the axial forces used during assembly can be reduced. A central clamping screw 55 is screwed in through the cylindrical projection 35 into a threaded bore 57 in the crankshaft 15. The clamping screw can if desired be removed after assembly.
In addition to the adhesive bond, roll pins 63 are inserted in axially aligned bores 59, 61, parallel to the axis 13, in the output end 11 and the flywheel 7 respectively. The roll pins 63 are arranged spaced apart on a pitch circle 65 centred on the axis 13 and by virtue of their radially resilient characteristics they take up tolerances both radially and circumferentially. By suitable selection of the shear strength of the roll pins the greater part of the torque can be transmitted through these pins. In that case the clamping screw 55 serves primarily for axial location, which has the advantage that for mounting the flywheel 7 only comparatively small tightening torques need to be applied.It will be understood that the clamping screw 55 can be omitted altogether when axial location is achieved by other means, for example by using adhesive on the mating surfaces or by a press fit of the cylindrical mating surfaces.
Removal of the flywheel 7 from the crankshaft 15 can be achieved using hydraulically actuated pulling devices acting through the threaded bore 57, or in any other suitable way.
In the embodiment explained above the flywheel carries a central projection which engages in an opening in the face of the output end of the crankshaft. The central projection takes care of radial location and guides the flywheel free of any tilting errors on the crankshaft. Alternatively, embodiments are also possible in which the crankshaft carries a cylindrical projection which engages in a central opening in the flywheel and here it locates the flywheel radially through substantially axially extending mating surfaces.

Claims (8)

1. Means for attaching an assembly comprising a flywheel, a friction clutch pressure plate unit and a driven clutch plate to an output end of a crankshaft of an internal combustion engine, comprises an adhesive on substantially axially extending mating surfaces and/or on radially extending mating surfaces of the flywheel and the output end to secure the flywheel to the output end.
2. Means as claimed in claim 1, in which the substantially axially extending mating surfaces are formed by cylindrical surfaces.
3. Means as claimed in claim 1 or claim 2, in which the substantially axially extending mating surfaces are dimensioned to provide a sliding fit.
4. Means as claimed in claim 1 or claim 2 in which the substantially axially extending mating surfaces are dimensioned to provide a press fit.
5. Means as claimed in any preceding claim, in which the flywheel is located on the output end of the crankshaft by means of the substantially axially extending mating surfaces.
6. Means as claimed in any preceding claim, in which the radial mating surfaces extend radially outside the substantially axially extending mating surfaces.
7. Means as claimed in any preceding claim, in which roll pins are inserted in axially aligned bores in the output end and the flywheel.
8. Means for attaching an assembly comprising a flywheel, a friction clutch pressure plate unit and a driven clutch plate to an output end of a crankshaft of an internal combustion engine substantially as described herein with reference to and as illustrated in the accompanying drawings.
GB9603054A 1993-03-26 1994-03-25 Means for attaching a clutch assembly to a crankshaft Expired - Fee Related GB2296958B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4309873 1993-03-26
GB9405955A GB2277363B (en) 1993-03-26 1994-03-25 Means for attaching a clutch assembly to a crankshaft

Publications (3)

Publication Number Publication Date
GB9603054D0 GB9603054D0 (en) 1996-04-10
GB2296958A true GB2296958A (en) 1996-07-17
GB2296958B GB2296958B (en) 1997-10-08

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Family Applications (2)

Application Number Title Priority Date Filing Date
GB9603055A Expired - Fee Related GB2296959B (en) 1993-03-26 1994-03-25 Means for attaching a clutch assembly to a crankshaft
GB9603054A Expired - Fee Related GB2296958B (en) 1993-03-26 1994-03-25 Means for attaching a clutch assembly to a crankshaft

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB9603055A Expired - Fee Related GB2296959B (en) 1993-03-26 1994-03-25 Means for attaching a clutch assembly to a crankshaft

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10008728A1 (en) * 2000-02-24 2001-08-30 Wilo Gmbh Electric motor for driving pump or fan, has holding arrangement with bolt attached to shaft end, protruding through central impeller wheel bore with head on contact surface enclosing bore
FR2918728B1 (en) * 2007-07-11 2010-01-15 Renault Sas SHAFT LOCKING AND TORQUE VARIATION DAMPING DEVICE FOR TRANSMISSION OF MOTOR VEHICLE.

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3653320A (en) * 1969-05-17 1972-04-04 Berstorff Gmbh Masch Hermann Calendar adjustment mechanism
US4172678A (en) * 1977-03-24 1979-10-30 Siemens Aktiengsellschaft Fastening a rotor on a shaft
GB2127938A (en) * 1982-09-29 1984-04-18 Dana Corp Method of forming a composite drive shaft tube
GB2156937A (en) * 1984-03-30 1985-10-16 Gkn Bound Brook Limited Apparatus for and method of production of a camshaft
US4915536A (en) * 1987-09-29 1990-04-10 Dana Corporation Modular yoke end
GB2236162A (en) * 1989-08-24 1991-03-27 Mannesmann Ag Conical adhesive hub connection
GB2243666A (en) * 1990-04-26 1991-11-06 Fichtel & Sachs Ag A combination of a crankshaft and a flywheel
JPH0891925A (en) * 1994-09-27 1996-04-09 Suzuki Motor Corp Barium titanate-based semiconductor ceramic

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3635320A (en) * 1969-12-31 1972-01-18 Anthony Capanna Clutch flywheel
GB2237077B (en) * 1989-10-05 1993-09-15 Automotive Products Plc Friction clutch assemblies
FR2689192B1 (en) * 1992-03-31 1994-05-27 Valeo DEVICE FOR FIXING A FLYWHEEL ON THE CRANKSHAFT OF AN INTERNAL COMBUSTION ENGINE AND ITS FLYWHEEL.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3653320A (en) * 1969-05-17 1972-04-04 Berstorff Gmbh Masch Hermann Calendar adjustment mechanism
US4172678A (en) * 1977-03-24 1979-10-30 Siemens Aktiengsellschaft Fastening a rotor on a shaft
GB2127938A (en) * 1982-09-29 1984-04-18 Dana Corp Method of forming a composite drive shaft tube
GB2156937A (en) * 1984-03-30 1985-10-16 Gkn Bound Brook Limited Apparatus for and method of production of a camshaft
US4915536A (en) * 1987-09-29 1990-04-10 Dana Corporation Modular yoke end
GB2236162A (en) * 1989-08-24 1991-03-27 Mannesmann Ag Conical adhesive hub connection
GB2243666A (en) * 1990-04-26 1991-11-06 Fichtel & Sachs Ag A combination of a crankshaft and a flywheel
JPH0891925A (en) * 1994-09-27 1996-04-09 Suzuki Motor Corp Barium titanate-based semiconductor ceramic

Also Published As

Publication number Publication date
GB2296959B (en) 1997-10-08
GB2296958B (en) 1997-10-08
GB9603054D0 (en) 1996-04-10
GB2296959A (en) 1996-07-17
GB9603055D0 (en) 1996-04-10

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Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20020325