WO2023030690A1 - Pré-amortisseur d'embrayage interne à capacité de filtration élevée - Google Patents

Pré-amortisseur d'embrayage interne à capacité de filtration élevée Download PDF

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Publication number
WO2023030690A1
WO2023030690A1 PCT/EP2022/025405 EP2022025405W WO2023030690A1 WO 2023030690 A1 WO2023030690 A1 WO 2023030690A1 EP 2022025405 W EP2022025405 W EP 2022025405W WO 2023030690 A1 WO2023030690 A1 WO 2023030690A1
Authority
WO
WIPO (PCT)
Prior art keywords
cover plate
spring cover
damper device
washer
tabs
Prior art date
Application number
PCT/EP2022/025405
Other languages
English (en)
Inventor
Ricardo Almeida PRADO
Vilma Aline Silva MENEZES
Renan Bergamaschi Serra GERALDI
Carlos Henrique Coronado SENA
Original Assignee
Eaton Intelligent Power Limited
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 Eaton Intelligent Power Limited filed Critical Eaton Intelligent Power Limited
Priority to CN202280058932.4A priority Critical patent/CN117881908A/zh
Publication of WO2023030690A1 publication Critical patent/WO2023030690A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • F16F15/121—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon using springs as elastic members, e.g. metallic springs
    • F16F15/123—Wound springs
    • F16F15/1238—Wound springs with pre-damper, i.e. additional set of springs between flange of main damper and hub
    • F16F15/12386—Pre-damper cage construction

Definitions

  • Pre-damping assemblies may be utilized to filter torsional vibration emanating from an engine.
  • Current pre-dampers may include components that are formed of polymeric material having a hysteresis that may fail to filter engine vibrations under certain conditions and can wear quickly. There is therefore a need in the art for a predamper assembly that is robust and filters vibrations in an idle condition and also provides a high hysteresis output for a main damper to absorb vibrations in a drive and coast condition.
  • One aspect of the examples of this disclosure includes a pre-damper device including a separator shield; a first spring cover plate housed in the separator shield; a friction washer housed in the separator shield, the first spring cover plate being between the separator shield and the friction washer; a Belleville washer housed in the separator shield, the first spring cover plate and the friction washer being between the separator shield and the Belleville washer; a stack plate housed in the separator shield, the Belleville washer being between the stack plate and the separator shield; a spacer washer housed in the separator shield, the stack plate being between the spacer washer and the separator shield; and a second spring cover plate, the friction washer, the Belleville washer, the stack plate, and the spacer washer being between the first spring cover plate and the second spring cover plate.
  • the stack plate includes one or more coil springs.
  • the first spring cover plate is a bottom spring cover plate
  • the second spring cover plate is a top spring cover plate.
  • the separator shield includes a planar body portion having a first central aperture formed therein.
  • the planar body portion of the separator shield includes a plurality of circumferentially spaced uprising tabs.
  • the plurality of circumferentially spaced uprising tabs define first spaced notches.
  • at least one of the plurality of circumferentially spaced uprising tabs includes a lower contact portion, an upper contact portion, and a main damper tab.
  • the first spring cover plate includes a plate body having a second central aperture formed therein.
  • the pre-damper device further includes a plurality of first circumferentially spaced spring tabs extending radially from the plate body.
  • the plurality of first circumferentially spaced spring tabs define a plurality of second spaced notches.
  • an internal diameter of the friction washer includes a plurality of teeth formed thereon.
  • the stack plate includes a stack plate body having a third central aperture formed therein, a plurality of circumferentially spaced coil spring tabs extend radially from the stack plate body, and third spaced notches are defined by the circumferentially spaced coil spring tabs.
  • the circumferentially spaced coil spring tabs include a plurality of spring apertures, and an internal diameter of the stack plate includes teeth formed thereon.
  • the second spring cover plate includes a top plate body having a fourth central aperture formed therein, a plurality of circumferentially spaced top spring tabs extend radially from the top plate body, the first spaced notches being defined by the circumferentially spaced top spring tabs.
  • the bottom spring cover plate is positioned in the separator shield such that the first circumferentially spaced spring tabs are within the first spaced notches defined by the circumferentially spaced uprising tabs of the separator shield, each of the first circumferentially spaced spring tabs includes an upright body, and a width of the first spaced notches is such as to allow contact at a lower contact portion of the upright body.
  • the friction washer contacts the plate body of the bottom spring cover plate on a lower surface thereof to provide a controlled frictional surface
  • the Belleville washer contacts an upper surface of the friction washer applying an axial load compressing the friction washer against the plate body
  • the friction washer is rotatively coupled to a hub by a plurality of teeth
  • the Belleville washer is rotatively coupled to the hub by the plurality of teeth.
  • the spacer washer is positioned in the separator shield such that a lower surface of the spacer washer contacts the stack plate body, and an upper surface of the spacer washer contacts the top plate body of the top spring cover plate.
  • the top spring cover plate is positioned in the separator shield such that second circumferentially spaced spring tabs are positioned within the first spaced notches defined by the circumferentially spaced uprising tabs, each of the second circumferentially spaced spring tabs includes an upright body, and the width of the first spaced notches is such that there is contact at an upper contact portion of the upright body.
  • the bottom spring cover plate and the top spring cover plate are configured to transfer torque from the separator shield to and from the coil springs, and the coil springs transfer the torque coming from the bottom spring cover plate and the top spring cover plate to and from the stack plate.
  • the friction washer is compressed to the bottom spring cover plate and has relative motion with respect to the bottom spring cover plate.
  • a pre-damper assembly includes the predamper device as discussed above, and a main damper assembly coupled to the predamper device, the main damper assembly including main damper tabs arranged in notches formed in a driven disc.
  • Figure 1 is an exploded perspective view of a pre-damper assembly.
  • Figure 2 is an assembled perspective view of a pre-damper assembly.
  • Figure 3 is a perspective view of a separator shield.
  • Figure 4 is a perspective view of a bottom spring cover plate.
  • Figure 5 is a perspective view of a friction washer.
  • Figure 6 is a perspective view of a Belleville spring.
  • Figure 7 is a perspective view of a stack plate.
  • Figure 8 is a perspective view of a spacer washer.
  • Figure 9 is a perspective view of a top spring cover plate.
  • Figure 10 is a perspective view of the pre-damper assembly attached to a driven disc of a transmission.
  • Figure 11 is a partial perspective view of the pre-damper assembly attached to a driven disc of a transmission.
  • Figure 12 is a partial perspective sectional view of the pre-damper assembly attached to a driven disc of a transmission.
  • Examples of the present disclosure include a driven disc pre-damper applicable to an extensive range of dry clutches, either single disc or twin disc, able to cover all sizes of clutches from pass car, around 180 mm, to heavy duty, around 430 mm, and all torque ranges from pass car, around 100 Nm, to heavy duty, around 3500 Nm, and can be bundled with organic or ceramic facings. Accordingly, examples of the disclosure include an internal pre-damper concept that, besides the function of filtering the torsional vibration coming from an engine in idle condition, also delivers a high hysteresis output for a main damper to absorb vibrations in drive or coast conditions.
  • Typical driven discs generally present an internal pre-damper with key components made of injected polymer that delivers a low hysteresis and high wear rate interface that may fail on filtering the engine rattle in some types of engines. Accordingly, a typical damper may not be able to filter vibrations at OEM level in, e.g., Euro V engines, and may not be able to deliver an adequate performance in terms of mileage
  • a damper is configured to deliver a 100% metal pre-damper that has a higher friction coefficient due to the key component, a separator shield, that plays the role of a friction interface and controls the stackup height of a Belleville spring, which is a load element, of the main damper.
  • the separator shield also interfaces with components of the pre-damper to lock the components in place during idle functioning when the main damper is not working.
  • the pre-damper includes a separator shield, top and bottom spring covers, a stack plate, coil springs, a toothed Belleville spring, a friction washer, and a spacer washer.
  • the separator shield is the main component and configured to enclose the rest of the pre-damper components.
  • the shield is attached in the main damper (MD) stack plate through a plurality of tabs such as, e.g., four tabs, that provide rotational linkage and compress the shield against the spring covers on a flywheel side.
  • the stack plate interface may be fixed while the spring cover interface is in a friction state, so that so they both rotate together.
  • the separator shield During the pre-damper stage, there is no relative motion between the separator shield and the spring covers, but during the MD stage, there is friction between the separator shield and the spring covers. This friction generates hysteresis torque inside the pre-damper, which is responsible to absorb vibrations coming from the engine to the driveline, and vice versa.
  • the stack plate axially compresses the separator shield against the spring covers due to the axial load applied by the Belleville spring located on the opposite side of the pre-damper.
  • the top and bottom spring covers are fully enclosed by the separator shield, and are mounted on the plurality of tabs of the separator shield.
  • the spring covers transfer torque coming from the separator shield tabs to the coil springs, and vice versa.
  • the spring covers also play a role of frictional interface for the hysteresis of the pre-damper by providing a controlled surface to the friction washer to rub against.
  • the coil springs transfer the torque coming from the spring covers to the stack plate, and vice versa, and are responsible to filter the vibration coming from the engine by reducing the torsional stiffness of the system and pushing the resonance out of the engine idle range.
  • the stack plate transfers the torque coming from the coil springs to a hub, and vice versa.
  • the hub is attached to an input shaft of a transmission.
  • the PD hysteresis package is composed by the toothed Belleville spring, the friction washer, and the spacer washer.
  • the Belleville spring provides the required axial load in the package to compress the friction washer against the bottom spring cover, providing a controlled friction surface.
  • the Belleville spring also compresses the spacer washer against the stack plate and top spring cover.
  • the friction washer is compressed to the bottom spring cover and has relative motion due to the splined interface with the hub. During the pre-damper stage, the friction washer rubs against the bottom spring cover generating the pre-damper hysteresis.
  • the spacer washer does not have the same splined interface and therefore does not rotate together with the hub.
  • the friction in this component is therefore not controlled since the spacer washer can rub against both the top spring cover and the stack plate.
  • the Belleville spring also presents a splined interface against the hub, in order to prevent relative motion between the Belleville spring and the counterparts friction washer and stack plate.
  • the pre-damper assembly 20 is formed of all metal components that provide a long lasting assembly.
  • the pre-damper assembly 20 filters torsional vibration coming from the engine in an idle condition and also delivers a high hysteresis output for the main damper to absorb vibrations in the drive/coast conditions.
  • the pre-damper assembly 20 includes a separator shield 22.
  • the separator shield 22 houses the additional components of the pre- damper assembly 20.
  • the separator shield 22 includes a planar body portion 24 having a first central aperture 26 formed therein.
  • a plurality of circumferentially spaced uprising tabs 28 are formed on the planar body portion 24. Spaced notches 30 are defined by the circumferentially spaced uprising tabs 28.
  • Each of the tabs 28 includes an upright body 32 that includes a lower contact portion 34, an upper contact portion 36, and a main damper tab 38.
  • the pre- damper assembly 20 includes a bottom spring cover plate 40.
  • the bottom spring cover plate 40 includes a plate body 42 having a second central aperture 44 formed therein.
  • a plurality of circumferentially spaced spring tabs 46 extend radially from the plate body 42. Spaced notches 48 are defined by the circumferentially spaced spring tabs 46.
  • the pre- damper assembly 20 includes a friction washer 50 having upper and lower surfaces 52, 54.
  • An internal diameter 57 of the friction washer 50 includes teeth 56 formed thereon.
  • the pre- damper assembly 20 includes a Belleville washer 58 having upper and lower surfaces 60, 62.
  • An internal diameter 64 of the Belleville washer 58 includes teeth 56 formed thereon.
  • the pre- damper assembly 20 includes a stack plate 66.
  • the stack plate 66 includes a stack plate body 68 having a third central aperture 70 formed therein.
  • a plurality of circumferentially spaced coil spring tabs 72 extend radially from the stack plate body 68. Spaced notches 74 are defined by the circumferentially spaced coil spring tabs 72.
  • Coil springs 76 are disposed in spring apertures 78 formed in the circumferentially spaced coil spring tabs 72.
  • An internal diameter 79 of the stack plate 66 includes teeth 56 formed thereon.
  • the predamper assembly 20 includes a spacer washer 80 having upper and lower surfaces 82, 84.
  • the predamper assembly 20 includes a top spring cover plate 86.
  • the top spring cover plate 86 includes a top plate body 88 having a fourth central aperture 90 formed therein.
  • a plurality of circumferentially spaced top spring tabs 92 extend radially from the top plate body 88. Spaced notches 94 are defined by the circumferentially spaced top spring tabs 92.
  • the separator shield 22 is a housing for the other components including, e.g., the bottom spring cover plate 40, the friction washer 50, the Belleville washer 58, the stack plate 66, the spacer washer 80, and the top spring cover plate 86. All of the other components are disposed within an internal boundary 96 defined by the circumferentially spaced uprising tabs 28.
  • the bottom spring cover plate 40 is positioned in the separator shield 22 such that the circumferentially spaced spring tabs 46 are positioned within the spaced notches 30 defined by the circumferentially spaced uprising tabs 28.
  • the circumferentially spaced uprising tabs 28 are positioned in the spaced notches 48.
  • the width of the spaced notches 48 is such that contact at the lower contact portion 34 of the upright body 32 occurs.
  • the friction washer 50 is disposed within the separator shield 22.
  • the friction washer 50 contacts the plate body 42 of the bottom spring cover plate 40 on the lower surface 54 to provide a controlled frictional surface as will be discuss in more detail below.
  • the Belleville washer 58 is disposed within the separator shield 22 and contacts the upper surface 52 of the friction washer 50, applying an axial load compressing the friction washer against the plate body 42.
  • the friction washer 50 is rotatively coupled to a hub 100 by the teeth 56.
  • the Belleville washer 58 is rotatively coupled to the hub 100 by the teeth 56.
  • the stack plate 66 is positioned in the separator shield 22 such that the circumferentially spaced coil spring tabs 72 are positioned within the spaced notches 30 defined by the circumferentially spaced uprising tabs 28.
  • the circumferentially spaced uprising tabs 28 are positioned in the spaced notches 48.
  • the stack plate 66 is rotatively coupled to the hub 100 by the teeth 56.
  • the spacer washer 80 is positioned in the separator shield 22 such that the lower surface 84 contacts the stack plate body 68.
  • the upper surface of the spacer washer contacts the top plate body 88 of the top spring cover plate 86.
  • the top spring cover plate 86 is positioned in the separator shield 22 such that the circumferentially spaced spring tabs 92 are positioned within the spaced notches 30 defined by the circumferentially spaced uprising tabs 28.
  • the circumferentially spaced uprising tabs 28 are positioned in the spaced notches 94.
  • the width of the spaced notches 94 is such that contact at the upper contact portion 36 of the upright body 32 occurs.
  • the pre-damper assembly 20 is connected to a main damper assembly 102.
  • the main damper tabs 38 are positioned in notches 103 formed in a driven disc 104.
  • the bottom spring cover plate 40 and the top spring cover plate 86 transfer torque from the separator shield 22 to the coil springs 76, and vice versa.
  • the bottom spring cover plate 40 also plays a role of frictional interface for the hysteresis of the pre-damper assembly by providing a controlled surface for the friction washer 50 to rub against.
  • the coil springs 76 transfer the torque coming from the bottom spring cover plate 40 and the top spring cover plate 86 to the stack plate 66 and vice versa, and are responsible to filter the vibration coming from the engine by reducing the torsional stiffness of the system and pushing the resonance out of the engine idle range.
  • the stack plate 66 transfers the torque coming from the coil springs 76 to the hub 100, and vice versa.
  • the hub 100 is attached to the input shaft of a transmission.
  • the hysteresis function of the pre-damper assembly 20 is provided by the toothed Belleville washer 58, the friction washer 50 and the spacer washer 80.
  • the Belleville washer 58 provides the required axial load to compress the friction washer 50 against the bottom spring cover plate 40 providing a controlled friction surface.
  • the Belleville washer 58 also compress the spacer washer 80 against the stack plate 66 and the top spring cover plate 86.
  • the friction washer 50 is compressed to the bottom spring cover plate 40 and has relative motion to it due to the splined interface with the hub 100.
  • the friction washer 50 keeps rubbing against the bottom spring cover plate 40 generating pre-damper hysteresis.
  • the Belleville washer 58 also presents a splined interface against the hub 100 to prevent relative motion between it and the friction washer 50 and the stack plate 66.

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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

Un dispositif de pré-amortisseur comporte un blindage de séparateur, une première plaque de couverture de ressort reçue dans le blindage de séparateur, une rondelle de friction reçue dans le blindage de séparateur, la première plaque de couverture de ressort étant entre le blindage de séparateur et la rondelle de friction, une rondelle Belleville reçue dans le blindage de séparateur, la première plaque de couverture de ressort et la rondelle de friction étant entre le blindage de séparateur et la rondelle Belleville, une plaque d'empilement reçue dans le blindage de séparateur, la rondelle Belleville étant entre la plaque d'empilement et le blindage de séparateur, une rondelle d'espacement reçue dans le blindage de séparateur, la plaque d'empilement étant entre la rondelle d'espacement et le blindage de séparateur, et une seconde plaque de couverture de ressort, la rondelle de friction, la rondelle Belleville, la plaque d'empilement et la rondelle d'espacement étant entre la première plaque de couverture de ressort et la seconde plaque de couverture de ressort.
PCT/EP2022/025405 2021-08-31 2022-08-31 Pré-amortisseur d'embrayage interne à capacité de filtration élevée WO2023030690A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202280058932.4A CN117881908A (zh) 2021-08-31 2022-08-31 具有高滤除能力的内部离合器预减振器

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202163239057P 2021-08-31 2021-08-31
US63/239,057 2021-08-31

Publications (1)

Publication Number Publication Date
WO2023030690A1 true WO2023030690A1 (fr) 2023-03-09

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ID=83280334

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Application Number Title Priority Date Filing Date
PCT/EP2022/025405 WO2023030690A1 (fr) 2021-08-31 2022-08-31 Pré-amortisseur d'embrayage interne à capacité de filtration élevée

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CN (1) CN117881908A (fr)
WO (1) WO2023030690A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5988343A (en) * 1996-04-04 1999-11-23 Fichtel & Sachs Ag Clutch disc with a torsional vibration damper for a motor vehicle friction clutch
US20170152913A1 (en) * 2015-11-30 2017-06-01 Eaton Corporation Clutch pack with robust hysteresis
US9964158B2 (en) * 2013-09-03 2018-05-08 Exedy Corporation Damper disk assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5988343A (en) * 1996-04-04 1999-11-23 Fichtel & Sachs Ag Clutch disc with a torsional vibration damper for a motor vehicle friction clutch
US9964158B2 (en) * 2013-09-03 2018-05-08 Exedy Corporation Damper disk assembly
US20170152913A1 (en) * 2015-11-30 2017-06-01 Eaton Corporation Clutch pack with robust hysteresis

Also Published As

Publication number Publication date
CN117881908A (zh) 2024-04-12

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