GB2166220A - Divided fly-wheel - Google Patents

Divided fly-wheel Download PDF

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Publication number
GB2166220A
GB2166220A GB08525611A GB8525611A GB2166220A GB 2166220 A GB2166220 A GB 2166220A GB 08525611 A GB08525611 A GB 08525611A GB 8525611 A GB8525611 A GB 8525611A GB 2166220 A GB2166220 A GB 2166220A
Authority
GB
United Kingdom
Prior art keywords
wheel
fly
primary
disc
cover
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Withdrawn
Application number
GB08525611A
Other versions
GB8525611D0 (en
Inventor
Franz Hartig
Nobert Pieper
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
Publication of GB8525611D0 publication Critical patent/GB8525611D0/en
Publication of GB2166220A publication Critical patent/GB2166220A/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • F16F15/131—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 the rotating system comprising two or more gyratory masses
    • F16F15/13164—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 the rotating system comprising two or more gyratory masses 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F16C19/525—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to temperature and heat, e.g. insulation
    • 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
    • F16F2222/00—Special physical effects, e.g. nature of damping effects
    • F16F2222/02—Special physical effects, e.g. nature of damping effects temperature-related

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  • 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

The divided fly-wheel for an internal combustion engine of a motor vehicle comprises a primary fly-wheel (3) and a secondary fly-wheel (5) coupled rotationally elastically with the primary fly-wheel (3) through a rotational vibration damper (9). The rotational vibration damper (9) comprises a central disc (13) which is secured by its external circumference to the primary fly-wheel (3), and cover discs (17, 19) arranged axially on both sides of the central disc (13), of which cover discs the cover disc (19) adjacent to the secondary fly-wheel (5) is secured with its external circumference to the secondary fly-wheel (5) and is mounted by its internal circumference on a bearing extension (11) of the primary fly-wheel (3). Thus the bearing (39) is thermally uncoupled from the secondary fly-wheel (5) and the transmittability of comparatively high torques is ensured. <IMAGE>

Description

SPECIFICATION Divided fly-wheel The invention relates to a divided fly-wheel for an internal combustion engine, especially of a motor vehicle.
A divided fly-wheel for an internal combustion engine of a motor vehicle is known from Fed.German Publ. Spec. No. 29 31 423, in which a primary fly-wheel screwed to a crankshaft of the internal combustion engine is coupled rotationally elastically through a rotational vibration damper with a secondary fly-wheel. The secondary flywheel forms the counter pressure plate of a conventional friction clutch. The rotational vibration damper comprises two annular central discs which are coupled at their external circumference in frictional engagement with the primary fly-wheel, also two annular cover discs arranged axially on both sides of the pair of central discs, which are connected rotationally elastically through springs with the central discs.The cover disc axially adjacent to the primary fly-wheel carries on its internal circumference a hub part which is rotatably mounted on an annular extension of the primary fly-wheel. The secondary fly-wheel is screwed together with the other cover disc on this hub. In this known divided flywheel the relatively short heat-conduction distance between the secondary fly-wheel, which is thermally loaded by the friction clutch, and the bearing retaining the secondary fly-wheel on the primary flywheel, is disadvantageous Since the secondary fly-wheel in operation can heat to several 100"C, excess temperatures can lead to bearing damage.
In the pending German Patent Application P 34 12 961.8 a similar devided fly-wheel is described in which however the secondary fly-wheel is mounted through the central disc of the rotational vibration damper on the primary fly-wheel. This kind of mounting protects the bearing against unacceptably great heating, since it lengthens the path of the heat flux.
It is the problem of the invention to produce a divided fly-wheel, especially for use in a friction clutch of a motor vehicle, which can be produced with comparatively low production expense and comparatively low costs, is durably loadable even in the case of a high torque to be transmitted and further thermally uncouples the rotation bearing of the secondary fly-wheel from the latter.
The fly-wheel according to the invention comprises a primary fly-wheel for connection with the crankshaft of the internal combustion engine and a secondary fly-wheel rotatably mounted through a rotational vibration damper on the primary flywheel or on a bearing part firmly connected therewith. The rotational vibration damper couples the secondary fly-wheel rotationally elastically with the primary fly-wheel. The rotational vibration damper comprises a central annular disc which is preferably firmly connected by its external circumference with the primary fly-wheel, also two cover discs, supported rotationally elastically on the central disc, on both axial sides of the central disc. The cover discs are secured at their external circumference on the secondary fly-wheel.One of the cover discs, preferably the cover disc axially adjacent to the secondary fly-wheel, is rotatably mounted on the bearing part of the primary fly-wheel.Discs of this kind can be produced in a simple way from sheet metal and permit relatively long heat conduction paths for the thermal relief of the bearing.
since the torques are introduced in each case in the region of the external circumference of the discs, even relatively high torques can be transmitted without problem.
An example of embodiment of the invention is to be explained in greater detail below by reference to a drawing. The drawing shows an axial longitudinal section through a divided fly-wheel of an internal combustion engine of a motor vehicle.
The drawing shows a fly-wheel 1 having two inertia masses with a primary fly-wheel 3 and a secondary fly-wheel 5. The fly-wheels 3, 5 have substantially disc form. The primary fly-wheel 3 is screwed coaxially with screws 6 to a crankshaft 7 of the internal combustion engine (not illustrated further). The secondary fly-wheel 5 is rotatably mounted and axially fixed through a rotational vibration damper 9 on a bearing ring 11 secured to gether with the primary fly-wheel 3 by means of the screws 6 on the crankshaft 7. The secondary fly-wheel 5 in the usual way forms on its side axially remote from the crankshaft 7 the counter-pressure-application face of a motor vehicle friction clutch which is not otherwise further illustrated.
The rotational vibration damper 9 couples the secondary fly-wheel 5 rotationally elastically with the primary fly-wheel 3 and comprises an annular central disc 13 which is secured at its external circumference for example with screws 15 to the primary fly-wheel 3. Axially between the central disc 13 and the primary fly-wheel 3 there is arranged a first annular cover disc 17, and axially between the central disc 13 and the secondary fly-wheel 5 there is provided a second cover disc 19. The cover discs 17, 19 are secured in common to the secondary flywheel 5 by their external circumference by means of distance rivets 21, with axial spacing from one another.The distance rivets 21 pass through apertures 23 which are elongated in the circumferential direction, in the region of the external circumference of the central disc 13 and together with the apertures 23 limit the range of rotation by which the fly-wheels 3, 5 are rotatable in relation to one another. In windows 25 of the central disc 13 for the one part and windows 27, 29 of the cover discs 17, 19, aligned axially with these windows, for the other part there are seated helical compression springs 31 which are resiliently stressed in the relative rotation of the fly-wheels 3, 5. The drawing shows only one of these springs 31, several of which are arranged in a circle in distribution in the circumferential direction.The cover discs 17, 19 are connected with one another by stiffening connection pieces 33 radially within the circle of arrangement.The rotational vibration damper 9 comprises conventional friction damper devices 35, friction ally stressed on relative rotation, which however are not to be explained here.
The cover disc 19 axially adjacent to the secondary fly-wheel 5 lies against the secondary fly-wheel 5 only in the region of the distance rivets 21, and otherwise extends with axial spacing from the secondary fly-wheel 5. On its internal circumference the cover disc 19 carries a bearing extension piece 37 protruding axially towards the primary fly-wheel 3, which extension radially outwardly overlaps the bearing ring 11 and is rotatably mounted by means of a ball-bearing 39 on the bearing ring. The ballbearing 39 is pressed with its outer race ring into the bearing extension 37. From the outer edge of the bearing ring 11 axially remote from the primary fly-wheel 3 an annular shoulder 41 protrudes radially outwards which fixes the inner race ring of the ball-bearing 39 axially between itself and a distance ring 43 supported on the primary fly-wheel 3.
An annular shoulder 45 protruding radially inwards from the free end of the bearing extension piece 37 grasps behind the outer race ring of the ball-bear ing 39 and fixes the secondary fly-wheel 5 axially on the primary fly-wheel 3.
The central disc 13 is expediently formed as a sheet metal stamping. The cover discs 17, 19 are preferably deep-drawn sheet metal pieces which reduces the production expense of the fly-wheel 1.
The cover disc 19 uncouples the ball-bearing 39 thermally from the secondary fly-wheel 5, which can heat up to 500 C. by reason of the friction heat generation of the clutch, for example in the starting of the motor vehicle. Since the torque from the primary fly-wheel 3 is transmitted to the central disc 13 and also the torque from the cover discs 17, 19 is transmitted to the secondary fly-wheel 5 in the region of the external circumference of these discs and fly-wheels, comparatively great torques can reliably be transmitted.

Claims (10)

1. Divided fly-wheel for an internal combustion engine, comprising a) a primary fly-wheel (3) to be driven in rotation about an axis of rotation by the internal combustion engine, b) a secondary fly-wheel (5) rotatable about the rotation axis in relation to the primary fly-wheel (3), c) a rotational vibration damper (9) arranged axially between the primary fly-wheel (3) and the secondary fly-wheel (5) and coupling the secondary fly-wheel (5) rotationally elastically with the primary fly-wheel (3), having a central annular disc (13), two annular cover discs 17, 19) arranged on axially opposite sides of the central disc (13) and rotatable about the rotation axis in relation to the central disc (13), and several springs (31) arranged in windows (25, 27, 29) of the central disc (13) and the cover discs (17, 19) and stressable in the relative rotation of the central disc (13) and the cover discs (17,19), the central disc (13) being connected with the primary fly-wheel (3) and the cover discs (17, 19) being connected with the secondary flywheel (5) and at least one of the cover discs (19) being mounted in the region of its internal circumference on a bearing part (11) firmly connected with the primary fly-wheel (3), characterised in that the secondary fly-wheel (5) is secured, in the region of the external circumference of the cover disc (19) rotatably mounted on the bearing part (11), on this cover disc (19).
2. Fly-wheel according Claim 1, characterised in that the secondary fly-wheel (5) is secured on the cover disc (19) axially adjacent to it.
3. Fly-wheel according to Claim 2, characterised in that the cover disc (19) axially adjacent to the secondary fly-wheel (5) is arranged with axially spacing from the secondary fly-wheel (5), except for the region of its securing to the secondary flywheel (5).
4. Fly-wheel according to Claim 2 or 3, characterised in that the cover discs (17, 19) are secured through common distance pieces (21) with axial spacing from one another on the secondary flywheel (5).
5. Fly-wheel according to one of Claims 1 to 4, characterised in that the bearing part is formed as a bearing ring (11) axially protruding from the primary fly-wheel (3) and in that the cover disc (19) axially adjacent to the secondary fly-wheel (5) carries an axially protruding bearing extension piece (37) which is mounted through a ball-bearing (39) on the bearing ring (11).
6. Fly-wheel according to Claim 5, characterised in that the bearing ring (11) protrudes away from the primary fly-wheel (3) and the bearing extension piece (37) protrudes away from the cover disc (19), axially towards one another, and they carry on their free ends annular shoulders (41, 45) protruding radially towards one another which fix the ballbearing (39) axially between them.
7. Fly-wheel according to one of Claims 1 to 6, characterised in that the central disc (13) is firmly connected by its external circumference with the primary fly-wheel (3).
8. Fly-wheel according to one of Claims 1 to 7, characterised in that the central disc (13) is made as a sheet metal stamping.
9. Fly-wheel according to one of Claims 1 to 8, characterised in that the cover discs (17, 19) are made as deep-drawn sheet metal parts.
10. Divided fly-wheel for an internal combustion engine as claimed in Claim 1, substantially as herein described with reference to and as illustrated by the example shown in the accompanying drawing.
GB08525611A 1984-10-20 1985-10-17 Divided fly-wheel Withdrawn GB2166220A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843438534 DE3438534A1 (en) 1984-10-20 1984-10-20 SHARED FLYWHEEL

Publications (2)

Publication Number Publication Date
GB8525611D0 GB8525611D0 (en) 1985-11-20
GB2166220A true GB2166220A (en) 1986-04-30

Family

ID=6248405

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08525611A Withdrawn GB2166220A (en) 1984-10-20 1985-10-17 Divided fly-wheel

Country Status (3)

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DE (1) DE3438534A1 (en)
FR (1) FR2572151A1 (en)
GB (1) GB2166220A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2328000A (en) * 1997-06-30 1999-02-10 Mannesmann Sachs Ag Flywheel mass assembly with a loss preventer
GB2329229A (en) * 1997-08-04 1999-03-17 Luk Lamellen & Kupplungsbau Apparatus for damping torsional vibrations
FR2876431A1 (en) * 2004-10-08 2006-04-14 Valeo Embrayages Double flywheel damper for internal combustion engine of motor vehicle, has secondary flywheel with annular inertial mass centered on hub using split flat washer fixed by rivets on hub with elastic washer of torque limiter
CN107228158A (en) * 2016-03-23 2017-10-03 舍弗勒技术股份两合公司 torque transmission device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3645308C2 (en) * 1985-09-07 1995-08-24 Luk Lamellen & Kupplungsbau Torsional damping mechanism for vehicle transmission
JP2594399B2 (en) * 1992-02-17 1997-03-26 株式会社エクセディ Flywheel assembly
DE4417654C2 (en) * 1994-05-20 2001-12-06 Mannesmann Sachs Ag Torsional vibration damping device with a spacer ring

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS601497B2 (en) * 1978-08-03 1985-01-16 アイシン精機株式会社 Rotary torque transmission device
DE8412116U1 (en) * 1984-04-18 1984-08-23 Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt STORAGE OF A FLYWHEEL
DE3427171A1 (en) * 1984-07-24 1986-01-30 LuK Lamellen und Kupplungsbau GmbH, 7580 Bühl Device for compensating torsional impacts

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2328000A (en) * 1997-06-30 1999-02-10 Mannesmann Sachs Ag Flywheel mass assembly with a loss preventer
GB2329229A (en) * 1997-08-04 1999-03-17 Luk Lamellen & Kupplungsbau Apparatus for damping torsional vibrations
GB2329229B (en) * 1997-08-04 2002-05-22 Luk Lamellen & Kupplungsbau Apparatus for damping torsional vibrations
FR2876431A1 (en) * 2004-10-08 2006-04-14 Valeo Embrayages Double flywheel damper for internal combustion engine of motor vehicle, has secondary flywheel with annular inertial mass centered on hub using split flat washer fixed by rivets on hub with elastic washer of torque limiter
CN107228158A (en) * 2016-03-23 2017-10-03 舍弗勒技术股份两合公司 torque transmission device

Also Published As

Publication number Publication date
FR2572151A1 (en) 1986-04-25
DE3438534A1 (en) 1986-04-24
GB8525611D0 (en) 1985-11-20

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)