WO2018051043A1 - Dispositif d'amortissement pour embrayage de véhicule automobile et embrayage comprenant un tel dispositif - Google Patents
Dispositif d'amortissement pour embrayage de véhicule automobile et embrayage comprenant un tel dispositif Download PDFInfo
- Publication number
- WO2018051043A1 WO2018051043A1 PCT/FR2017/052487 FR2017052487W WO2018051043A1 WO 2018051043 A1 WO2018051043 A1 WO 2018051043A1 FR 2017052487 W FR2017052487 W FR 2017052487W WO 2018051043 A1 WO2018051043 A1 WO 2018051043A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- damping device
- washer
- web
- damper
- secondary damper
- Prior art date
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
-
- 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
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
- F16D3/14—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions combined with a friction coupling for damping vibration or absorbing shock
-
- 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
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/32—Belleville-type springs
- F16F1/324—Belleville-type springs characterised by having tongues or arms directed in a generally radial direction, i.e. diaphragm-type springs
Definitions
- Damping device for a motor vehicle clutch and clutch comprising such a device
- the invention relates to a damping device for a friction clutch mechanism of a motor vehicle and a clutch comprising such a device.
- the friction clutches have the function of transmitting a torque between an input rotary member and a rotary output member, by pinching the friction between plates, respectively, of pressure and reaction linked in rotation with a steering wheel. engine.
- the input element is formed by a friction disc and the output element is rotatably connected, with or without angular play, to the input shaft of the gearbox via a connected central hub. to a progressive disc bearing friction linings.
- Such clutches are equipped with a damping device whose function is to filter the vibrations coming from the engine.
- the invention relates to damping devices with two stages of resilient compression springs comprising, respectively, a main damper and a secondary damper, wherein the main damper is coupled in series with the secondary damper. between an input rotary member and an output rotary member.
- Each of these dampers comprises, in general, two guide washers provided with housings for helical spring elastic compression springs that are secured in rotation around a central hub by trapping at least one intermediate web.
- the invention is particularly concerned with an improvement of the secondary damper.
- FR 2,890,141 discloses a friction clutch equipped with a damping device comprising a pre-damper and a main damper, each having a traditional structure and being provided, in the alternative, with friction means which complete the action of the compression springs and which make it possible to dissipate the energy accumulated in these springs in the presence of vibrations and irregularities of the rotational torque produced by engine.
- the friction means that are specifically associated with the pre-damper comprise surfaces carried by washers with elastic properties made of metal.
- this document provides for the use of a plastic washer which is mounted between these metal spring washers and the guide washer.
- a plastic insert is introduced into the pre-damper between the spring washer and the web, both made of metal.
- this insert is an additional component that increases the axial size of the pre-damper several millimeters and its assembly is a complex operation whose impact on production costs is penalizing.
- the invention aims to remedy this technical problem by modifying the structure of the secondary damper to avoid generating friction, within this structure, between the metal surfaces facing a spring washer and a sail, while limiting its axial size and reducing the number of components.
- a two-stage damping device for a motor vehicle friction clutch comprising, on the axis of revolution, a main damper and a secondary damper each provided with at least one guide washer and at least one metal intermediate web, characterized in that the secondary damper further comprises a spring washer mounted between the guide ring and the web and which is rotatably secured said web.
- said spring washer is provided with latching lugs cooperating with corresponding notches formed on the periphery of said web and, preferably, on its inner periphery.
- the device comprises two sails juxtaposed, each of them having notches cooperating with the tabs of the elastic washer to jointly secure them in rotation.
- the spring washer is metallic and of the Belleville type.
- the radially outer edge of the spring washer is curved.
- the tabs of the washer extend radially and projecting from its inner edge towards the central axis of revolution.
- said spring washer carries at least three angularly equidistant tabs.
- said washer has a conical angle profile between 15 ° and 50 °.
- said tabs are in the form of brackets consisting of a flexible blade ensuring the connection with the body of the washer and extending by a projecting tongue ensuring retention in said notches of the veil .
- the blade has a line of inflection at mid-length and the tongue is inclined with an angle of between 90 ° and 120 ° relative to this blade.
- the guide ring of the secondary damper is made of plastic and is in frictional contact with said spring washer.
- the coefficient of friction between the spring washer and the guide ring is between 0.2 and 0.4.
- the secondary damper is a pre-damper.
- the damping device comprises an input element, formed in particular by a friction disc bearing friction linings, and an output element, formed in particular by a central hub, intended to drive a shaft in rotation. of the gearbox, the main damper and the secondary damper being arranged to transmit a torque between the input member and the output member.
- the main damper is coupled in series with the secondary damper between the input element and the output element.
- the metal intermediate web of the secondary damper which is integral in rotation with the spring washer is adapted to rotate the output element.
- the metal intermediate web of the secondary damper which is integral in rotation with the spring washer is adapted to drive in rotation the central hub.
- the metal intermediate web of the secondary damper which is integral in rotation with the spring washer is arranged to transmit a torque between the springs of the secondary damper and the central hub (output member).
- the elastic washer of the secondary damper is compressed axially between the metal intermediate web of the secondary damper and the guide ring of the secondary damper.
- the elastic washer of the secondary damper comprises an annular contact zone arranged to rub against the guide ring of the secondary damper.
- the secondary damper comprises a first group of springs and a second group of springs, the first and second groups of springs being arranged in parallel, a first intermediate layer being arranged to transmit a torque between the first group of springs and the hub with a functional angular clearance between the first intermediate web and the hub, a second intermediate web being arranged to transmit a torque between the second group of springs and the hub without functional backlash between the second intermediate web and the hub.
- the spring washer is mounted between the guide ring and the first web and is made integral in rotation with the first web.
- the first intermediate web is arranged axially between the second intermediate web and the spring washer.
- Another object of the invention is a friction clutch for motor vehicles equipped with a two-stage damping device as defined above.
- the damping device of the invention thus allows better management of friction within the damper by eliminating the relative clearance previously existing between the web and the guide washer.
- FIG. 1 shows a partial exploded perspective view of a clutch damping device according to a first embodiment of the invention.
- FIG. 2 is a perspective view from above of the spring washer used in the damping device of FIG. 1.
- FIG. 3 is a view from below of the spring washer of FIG. 2.
- FIG. 4 is a detail sectional view of a hooking tab of the elastic washer of the invention according to that of FIGS. 2 and 3.
- FIG. 5 represents a perspective view from above of the elastic washer assembled to the web of the damping device of the invention.
- identical or similar elements are marked with identical reference signs throughout the figures.
- the friction clutch mechanisms comprise a damping device whose function is to filter the vibrations coming from the engine.
- This device which is partially shown in FIG. 1, comprises, in the traditional way, components with a symmetry of revolution about an axis X constituted in particular by a central hub M whose body is linked to the shaft. input of a gearbox (not shown).
- This damping device is here two stages and comprises, on the axis of revolution, a main damper and a secondary damper each provided with at least one guide washer and at least one metal intermediate web.
- the secondary damper which is more particularly concerned with the invention has a structure substantially similar to that of the main damper but is of smaller dimensions and has mechanical properties specifically adapted to its functions.
- the secondary damper is represented here partially with one of its guide washers G made of plastic and in which are housed helical compression springs R by enclosing two intermediate webs 2, 3 made, for their part, of metal and mounted against the other around the hub M.
- the hub M carries, on its cylindrical outer wall, longitudinal ribs N which cooperate with corresponding crenellations C2, C3 made on the respective inner edge of the webs 2, 3 (see Figure 1).
- the secondary damper further comprises an elastic washer 1 also made of metal and mounted between the web 2 and the guide washer G, as illustrated in FIG. 1.
- the washer 1 is preferably of the "Belleville” type and its inner edge is provided with slots 10 giving it a greater capacity for elastic deformation.
- the orientation of these crenellations 10 is such that the inner edge of the washer has a slightly conical profile with an apex angle of between 15 ° and 50 ° so as to increase its flexibility.
- the invention aims to improve the damping device by modifying the structure of the secondary damper.
- the invention aims to fix the washer 1 on the veil 2 to make them integral in rotation.
- the spring washer 1 is provided with latching lugs 11 cooperating with corresponding notches 21 formed on the inner periphery of the web 2 (see Figures 1 and 5).
- the washer 1 carries at least three tabs 11 angularly equidistant and, in the embodiment shown in Figures 2 and 3, this washer carries six tabs 11; two adjacent legs framing two contiguous crenellations.
- the tabs 11 extend radially and projecting from the inner edge of the spring washer 1 in the direction of the central axis of revolution X.
- the blade 111 has an inflection line 110 at mid-length.
- the line 110 delimits, on the blade 111, respectively, a first section 111a of connection to the inner edge of the washer 1 and a second section 111b whose end carries, via an elbow 111c, the tongue 112. This configuration improves the flexibility paws.
- the sections 111a and 111b are inclined to each other by an angle ⁇ between 5 ° and 30 °.
- the tongue 112 is inclined, for its part, with an angle ⁇ of between 90 ° and 120 ° and preferably of 112 ° with respect to the plane of the end section 111b of the blade 111 and has a height h of between 2 and 5 mm.
- the connecting portion 111a extends substantially at rest according to the orientation of the frustoconical face defined by the crenellated inner edge of the spring washer 1. More specifically, the section 111a is oriented at the same angle with respect to the plane of the washer 1 as the crenellations 10, as shown in FIG. 2.
- the spring washer 1 has a radially outer edge 13 which is slightly curved or curved so as to form a contact zone with the guide ring G, as shown in FIGS. 4 and 5.
- the coefficient of friction between the two washers is between 0.2 and 0.4.
- the secondary damper is here a pre-damper.
- the damping device comprises an input element, formed in particular by a friction disc bearing friction linings, and an output element M, formed in particular by a central hub M, intended to drive a shaft in rotation. of the gearbox, the main damper and the secondary damper being arranged to transmit a torque between the input element and the output element M, the metal intermediate web 2 of the secondary damper which is integral in rotation with the spring washer 1 being able to rotate the output element M.
- the elastic washer 1 of the secondary damper is compressed axially between the metal intermediate web 2 of the secondary damper and the guide ring G of the secondary damper.
- the spring washer 1 of the secondary damper comprises an annular contact zone arranged to rub against the guide ring G of the secondary damper.
- the pre-damper comprises a first group of springs and a second group of springs, the first and second groups of springs being arranged in parallel, a first intermediate layer 2 being arranged to transmit a torque between the first group of springs and the hub M with a functional angular clearance between the first intermediate web 2 and the hub M, a second intermediate web 3 being arranged to transmit a torque between the second group of springs and the hub M without functional backlash between the second intermediate web 3 and the hub M, and in that the spring washer 1 is mounted between the guide washer G and the first web 2 and is made integral in rotation with the first web 2.
- each of the two webs 2, 3 juxtaposed with the secondary damper comprises notches cooperating with the lugs 11 of the elastic washer 1 to jointly secure them in rotation with the spring washer 1 .
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- 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
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112019002996A BR112019002996A2 (pt) | 2016-09-16 | 2017-09-18 | dispositivo de amortecimento para embreagem de veículo automóvel e embreagem compreendendo tal dispositivo |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1658673A FR3056275B1 (fr) | 2016-09-16 | 2016-09-16 | Dispositif d'amortissement pour embrayage de vehicule automobile et embrayage comprenant un tel dispositif |
FR1658673 | 2016-09-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2018051043A1 true WO2018051043A1 (fr) | 2018-03-22 |
Family
ID=57396644
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2017/052487 WO2018051043A1 (fr) | 2016-09-16 | 2017-09-18 | Dispositif d'amortissement pour embrayage de véhicule automobile et embrayage comprenant un tel dispositif |
Country Status (3)
Country | Link |
---|---|
BR (1) | BR112019002996A2 (fr) |
FR (1) | FR3056275B1 (fr) |
WO (1) | WO2018051043A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111463101A (zh) * | 2020-05-09 | 2020-07-28 | 北方夜视技术股份有限公司 | 方形微通道板组件 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3442705A1 (de) * | 1984-11-23 | 1986-05-28 | LuK Lamellen und Kupplungsbau GmbH, 7580 Bühl | Torsionsschwingungsdaempfer |
FR2787539A1 (fr) * | 1998-12-21 | 2000-06-23 | Valeo | Dispositif amortisseur de torsion pour friction d'embrayage |
FR2890141A1 (fr) | 2005-08-31 | 2007-03-02 | Valeo Embrayages | Embrayage a friction, en particulier pour vehicule automobile, comportant des moyens de frottement differencies et modules pre-assemble pour cet embrayage a friction |
-
2016
- 2016-09-16 FR FR1658673A patent/FR3056275B1/fr active Active
-
2017
- 2017-09-18 BR BR112019002996A patent/BR112019002996A2/pt unknown
- 2017-09-18 WO PCT/FR2017/052487 patent/WO2018051043A1/fr active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3442705A1 (de) * | 1984-11-23 | 1986-05-28 | LuK Lamellen und Kupplungsbau GmbH, 7580 Bühl | Torsionsschwingungsdaempfer |
FR2787539A1 (fr) * | 1998-12-21 | 2000-06-23 | Valeo | Dispositif amortisseur de torsion pour friction d'embrayage |
FR2890141A1 (fr) | 2005-08-31 | 2007-03-02 | Valeo Embrayages | Embrayage a friction, en particulier pour vehicule automobile, comportant des moyens de frottement differencies et modules pre-assemble pour cet embrayage a friction |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111463101A (zh) * | 2020-05-09 | 2020-07-28 | 北方夜视技术股份有限公司 | 方形微通道板组件 |
CN111463101B (zh) * | 2020-05-09 | 2022-08-16 | 北方夜视技术股份有限公司 | 方形微通道板组件 |
Also Published As
Publication number | Publication date |
---|---|
FR3056275B1 (fr) | 2018-10-12 |
FR3056275A1 (fr) | 2018-03-23 |
BR112019002996A2 (pt) | 2019-05-14 |
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