FR3060687A1 - A PHASING MEMBER TORQUE TRANSMISSION DEVICE WITH STOPS - Google Patents

Abstract

The invention relates to a torque transmission device, for a motor vehicle, comprising a phasing member (30) provided with rotational abutment means with an annular web (24) and a rotational connection with an annular support. (36) device for pendulum damping device (1) comprising pendular masses (35) mounted movably vis-à-vis the annular support (36). In addition, one of the annular support (36) and the phasing member (30) comprises means for rotating abutment with a guide ring (7a, 7b).

Description

060 687

62593 ® FRENCH REPUBLIC

NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY © Publication number:

(to be used only for reproduction orders) (© National registration number

COURBEVOIE © Int Cl ⁸ : F16 F15 / 123 (2017.01)

PATENT INVENTION APPLICATION

A1

(© Date of filing: 16.12.16. © Applicant (s): VALEO EMBRAYAGES Company by (© Priority: simplified actions - FR. @ Inventor (s): POIRIER GAEL, LEBAS GILLES, COMMEINE EMMANUEL, EVENING MARYSE and (43) Date of public availability of the LAFORGE THIBAULT. request: 22.06.18 Bulletin 18/25. (© List of documents cited in the report of preliminary research: Refer to end of present booklet (© References to other national documents ® Holder (s): VALEO EMBRAYAGES Company by related: simplified actions. ©) Extension request (s): (© Agent (s): VALEO EMBRAYAGES Company by simplified actions.

P4) TORQUE TRANSMISSION DEVICE WITH PHASING MEMBER PROVIDED WITH STOPPERS.

FR 3 060 687 - A1 y ") The invention relates to a torque transmission device, for a motor vehicle, comprising a phasing member (30) provided with stop means in rotation with an annular web (24), as well as 'a rotational connection with an annular support (36) of pendulum damping device (1) comprising pendulum masses (35) mounted movably with respect to the annular support (36). In addition, one of the annular support (36) and the phasing member (30) comprises stop means in rotation with a guide washer (7a, 7b).

Torque transmission device with phasing device provided with stops

The present invention relates to a torque transmission device for a motor vehicle.

Such a device generally comprises a torque input element, intended to be coupled directly or indirectly, for example to a crankshaft, a torque output element intended to be coupled for example to an input shaft of a gearbox, and elastic members mounted between the torque input and output elements and acting against the rotation of one of said torque input and output elements relative to the other.

When the torque transmission device is of the LTD (Long Travel Damper) type, it comprises several pairs of elastic members, the elastic members of the same pair being arranged in series by means of a phasing member so that the elastic organs deform in phase with each other.

Furthermore, it is already known to produce a phasing subset comprising two annular phasing members secured in rotation and between which an annular web belonging to one of said torque input and output elements is axially interposed.

It is also known to couple with this LTD type transmission device, a pendulum type damping device to filter at least part of the acyclisms induced by the heat engine of which the crankshaft is a part.

Furthermore, numerous abutment members must be provided to preserve the integrity of the elastic members and the pendulum damping device, in particular in the event of overtorque, for example in the event of shocks which may occur. It is known in the prior art to add a multiplicity of parts for these stop functions.

This induces a multi-part manufacturing, a significant axial size and a relatively complex assembly. An unfavorable consequence is also to be found in the waterproofing which is difficult to achieve.

The invention aims in particular to provide a simple, effective and economical solution to these problems.

To this end, it offers a torque transmission device for a motor vehicle, comprising:

- a first element and a second element, the first and second elements being, one a torque input element, the other a torque output element,

- at least one group of elastic members mounted between the first and second elements and designed to act against the rotation of one of said first and second elements, during the rotation of one of said first and second elements relative to the other, the elastic members of said group bearing, on the one hand, on an annular web belonging to one of said first and second elements, and on the other hand on (typically two) guide washers which extend axially on either side of the annular web and which are rotatable with respect to the annular web, the annular web and the guide washers belonging respectively to one and the other of said first and second elements,

- a phasing member through which are arranged in series at least a first elastic member and at least a second elastic member of said (at least one) group of elastic members, so that these elastic members deform in phase l one with the other, the phasing member being movable relative to each of the first and second elements,

- a pendulum damping device comprising an annular support and pendulum masses mounted movably with respect to the annular support, which is coupled in rotation with one of said first and second elements, characterized in that:

- the phasing device includes:

- stop means in rotation with the annular web,

- a link in rotation with the annular support and one of the annular support,

- And one of the annular support and the phasing member further comprises stop means in rotation with one of the guide washers.

The rotation stop functions are added to the phasing device, which reduces the number of separate components. Manufacturing becomes one-piece; The axial size is less; mounting is easier compared to the aforementioned solution.

In this assembly, it has been worked in particular how to ensure the rotational stop of one of the annular support and the phasing member with one of the guide washers.

In fact, this can influence both axial and radial dimensions.

One solution proposed consists in that the aforementioned means of rotation stop of one therefore among the annular support and the phasing member with one of the guide washers comprise axial protrusions which are provided with the annular support and which define each circumferentially lateral stops cooperating in rotation with lateral walls of cutouts formed in one of the guide washers.

A proposed alternative is that these means of rotation stop are provided on one face (called first face) of the phasing member and each define there circumferentially lateral stops cooperating in rotation with side walls of cutouts formed in one of the guide washers.

In this case, we will take advantage of the axial protuberances necessary for the production of the lateral stops on said first face of the phasing member in order to achieve, typically in their extension, the connection in rotation with the annular support.

Thus, the connection in rotation with the annular support may include second axial protrusions axially extending first protrusions which may materialize said stop means in rotation with one of the guide washers.

At a minimum, even if it is angularly offset with respect to these abutment means, this connection in rotation with the annular support will be provided on the side of said first face of the phasing member.

As for the rotational stop of the phasing member with the annular web, it is proposed to produce it, in the first aforementioned embodiment, so that the intended rotational stop means comprise radial protuberances formed on a hub which is provided with the annular web, these radial protuberances each cooperating in rotation with lateral stops defined circumferentially by lateral walls of cutouts formed in the phasing member.

The production of the two abovementioned rotation stop means therefore via cutouts, for example formed on the inner peripheries respectively of one of the guide washers and of the phasing member, this associated with an axial engagement of said hub, will ensure a space requirement. less and a mechanically favorable proximity.

In the alternative mentioned above, it is further proposed that the stop in rotation of the phasing member with the annular web is produced on the second face of the phasing member (face opposite to the first) by axial fingers which will each circumferentially define lateral stops cooperating in rotation with side walls of cutouts formed in the annular web.

Again, this solution makes it possible to reduce the axial size by comparison with known structures.

More generally, with this alternative embodiment, provision may be made for:

- on a first face of the phasing member, the connection in rotation with the annular support and the stop means in rotation with one of said guide washers,

- And, on a second face of this phasing member axially opposite to the first, the stop means in rotation with the annular web.

In the first embodiment, the rotational connection between the phasing member and the annular support will rather include axial fixing lugs which will be provided with the annular support and which will be fixed with the phasing member.

An advantageous embodiment even provides that the annular support comprises:

- a radially outer annular part on which the pendulum masses are mounted and the coupling in rotation of the annular support with one of the guide washers, and

- a radially inner washer fixed with the radially outer annular part and which comprises a part of the connection in rotation with the phasing member.

This will avoid forging an overly massive support and will facilitate the manufacture of the axial fixing lugs and the above-mentioned axial protuberances.

Indeed, we can then provide that these axial protuberances, dedicated to the rotational stop of the phasing member with the annular web, are carried by the radially inner washer and are extended axially by the axial fixing lugs.

This solution is again expected to be compact.

The invention will be better understood and other details, characteristics and advantages of the invention will appear on reading the following description given by way of nonlimiting example with reference to the appended drawings in which:

FIG. 1 is a schematic representation of a torque transmission device according to the invention,

- Figures 2 to 8 illustrate a torque transmission device according to a first embodiment, in particular:

FIG. 2 is a perspective view, from the front, of the two guide washers and of the phasing member and annular web contained therein, arranged axially between them, successively,

FIGS. 3 and 4 are two exploded perspective views of the rear and front of the device, respectively,

- Figure 5 is again an interior view, from the front, front guide washer removed,

FIG. 6 is an assembled view corresponding to FIG. 4,

- Figure 7 shows the phasing device, alone,

FIG. 8 shows, alone, a radially inner washer to be fixed with a radially outer annular part of the annular support, and which in this case comprises part of the connection in rotation with the phasing member,

FIGS. 9 to 14 illustrate a torque transmission device according to a second embodiment, in particular:

- Figures 9 and 10 show locally the two faces of the phasing member,

- Figure 11 corresponds to Figure 5, in this second embodiment, and Figure 12 to Figure 2 assembled,

- Figure 13 shows the phasing device, alone,

- and figure 14 shows, enlarged, the central part of figure 12.

A transmission assembly comprising a torque transmission device according to the invention is shown diagrammatically and partially in FIG. 1. This assembly makes it possible to transmit a torque from an output shaft of an internal combustion engine of a motor vehicle, such as a crankshaft 1, to an input shaft 2 of a gearbox.

The transmission assembly includes a clutch 21 (figure

1) for transmitting a torque between an input element 22 coupled to the crankshaft 1 and an output element 23, comprising the damping device.

The axis around which the coupling takes place is marked X. Thus, in the application, what is axial is parallel to this axis X, and is radial which is perpendicular to it.

The input element may comprise, as is known per se, a reaction plate 41 (visible in FIGS. 3, 4 and 6 in particular) and a pressure plate movable axially relative to the reaction plate.

The transmission device comprises two guide washers 7, said below respectively rear guide washer 7a and front guide washer 7b.

In the example shown in the following figures, the rear guide washer 7b has, on its radially outer periphery and on its two opposite faces 12a, 12b, friction linings 13a, 13b. Axially, the rear friction linings 13a receive support from the pressure plate which applies the front friction linings 13b against the reaction plate 41.

As can be better seen in Figures 2 to 8 illustrating a first embodiment of the invention, the rear guide washer 7a and front 7b are rotatably mounted around a fluted central hub 8, intended to be coupled to the shaft input 2 of the gearbox (not shown).

The guide washers 7a, 7b conventionally include spaces 15 used to accommodate elastic members 10a, 10b (the dotted lines in Figure 2 indicate a hidden area behind the visible wall).

The elastic members 10a, 10b are for example helical compression springs. Each member 10a, 10b can be composed of two concentric helical springs.

The guide washers are connected together by an axial sleeve 9 to allow the elastic members to be arranged axially between these two washers. The sleeve 9 is here in one piece with the front guide washer 7b. Alternatively, the sleeve 9 may be integral with the other guide washer 7a or be an insert. The sleeve 9 is connected by a plurality of fixing members 11 to the rear guide washer 7a.

An annular web 24 is integral with the central hub 8.

As can be seen in particular in FIG. 2, the annular web 24 has an radially internal annular portion 25 from which lugs 26, for example three in number, extend radially outwards. Each tab 26 has two opposite lateral sides 27 serving to support the elastic members 10a, 10b and inclined relative to one another and relative to the radial direction.

Two abutment pads 28 extend circumferentially on either side of each tab 26, at its outer periphery.

Circumferentially, the elastic members 10a, 10b are mounted between the annular web 24 and the guide washers 7a, 7b.

More particularly, the elastic members 10a, 10b are arranged in pairs. The elastic members of the same pair are arranged in series by means of a common phasing member 30, so that the elastic members 10a, 10b deform in phase with one another. In the embodiments shown in the figures, the transmission device comprises three pairs of elastic members 10a, 10b.

Thus, for each pair of elastic members 10a, 10b, as a function of the direction of rotation of the guide washers 7a, 7b relative to the annular web 24, one of the elastic members (for example 10a) is intended to bear, on the one hand, on the corresponding end of the windows 15 of the guide washers 7a, 7b and, on the other hand, on the phasing member 30. The other elastic member (for example 10b) is then intended to take support, on the one hand, on the phasing member 30 and, on the other hand, on one of the faces 27 of the corresponding tab 26 of the annular web 24.

The phasing member 30 has a radially internal annular portion 31 from which tabs 32 (FIG. 7), for example three in number, extend radially outwards. Each tab 32 has two opposite lateral sides 33 serving to support the elastic members 10a, 10b and inclined with respect to one another and with respect to the radial direction. Two abutment pads 34 extend circumferentially on either side of each support member, at its external periphery.

The abutment pads 28 of the legs 26 of the annular web 24 are capable of coming to bear respectively on the abutment pads 34 of the legs 32, which thus form support members of the phasing member 30 (see FIG. 5, in particular) .

As can be seen in particular in Figures 3,4,6, the device further comprises pendulum masses 35 mounted movably at the radially external periphery of an annular support 36, which is connected only to the phasing member 30. pendulars have two parts mounted axially on either side of the annular support 36 and connected by one or more spacers 370 passing through at least one opening of the support and other openings made respectively through the pendulum masses. At least one rolling member, such as a roller, is mounted between rolling tracks defined on each spacer 370 and the edge of the corresponding opening of the support, so that in operation the pendulum masses are driven by 'a pendulum movement. These masses 35 are intended to improve the filtration of vibrations and rotational acyclisms.

It can be seen in the figures in FIGS. 3, 4 and 6 in particular, the reaction plate 41, mounted axially between the annular web 24 and the annular support 36, the friction linings 13b coming to bear against a flat part of this reaction plate in the engaged position. The reaction plate is secured in rotation with the pressure plate, not shown by means of fixing members arranged to be inserted into holes in the reaction plate formed radially outside the plate.

In operation, the guide washers 7a, 7b and the hub 6 pivot relatively with respect to the web 24 and the hub 8, in the direct direction or in the retro direction.

On the basis of the relatively conventional embodiment which precedes, it is further provided, in accordance with the invention, that the phasing member 30 comprises stop means in rotation with the annular web 24, as well as a connection in rotation with the annular support 36.

In addition, one of the annular support 36 and the phasing member 30 comprises stop means in rotation with one of the guide washers 7.

This is visible in particular in figures 7,8 and, in a mounted situation, figures 4,6.

In the embodiment illustrated in particular in these figures, the rotation stop means of one of the annular support 36 and the phasing member 30 with one of the guide washers 7a, 7b comprise axial protrusions 37 of which is provided with the annular support 36 and which each define circumferentially lateral stops 38 cooperating in rotation with side walls 43 of cutouts 45 formed at the inner periphery of one of the guide washers 7a, 7b. Here, it is the guide washer 7a. The cutouts 45, for example three in number, can be defined by slots formed on the inner periphery of the guide washer (see Figures 2.4, in particular).

Still in this same embodiment, the means for abutment in rotation of the phasing member 30 with the annular web 24 comprise radial protrusions 47 (see FIG. 4 in particular) formed on the hub 8 which is provided with the annular web 24 and which each cooperate in rotation with lateral stops 49 defined circumferentially by lateral walls of cutouts 51 formed on the inner periphery of the phasing member 30. The cutouts 51, for example six in number, can be defined by slots formed on the inner periphery of the phasing member.

As for the rotational connection between the phasing member 30 and the annular support 36, it comprises, in this same embodiment, lugs 53 of axial fixing which is provided with the annular support 36 and which are fixed with the member phasing 30 (see Figures 6.8, in particular).

In addition, in this embodiment, it is proposed that the annular support 36 include (see FIGS. 3,4,8 in particular):

- a radially outer annular part 57, on which the pendular masses 35 are movably mounted, and the coupling in rotation of the annular support 36 with one of the guide washers, and

- a radially inner washer 55 fixed with the radially outer annular part 57 and which comprises a part of the connection in rotation with the phasing member 30.

In the preferred embodiment, the washer 55 is annular and is fixed with the radially outer annular part 57. Rivets 58 can make it possible to fix them together.

It is the washer 55 which comprises the axial protrusions 37 with lateral stops 38, which are extended axially by the lugs 53 for axial fixing.

The legs 53 for axial fixing may in particular be each engaged axially in an axial orifice 59 of the phasing member 30 and riveted there.

Each lug 53 for axial fixing can be double, that is to say three pairs per annular support 36.

Figures 9 to 14 illustrate a second embodiment of a device according to the invention and operating on the same principle as above, but with a different structure.

The device in FIGS. 9 to 14 thus differs from that described above in that the phasing member 30 has first and second faces 30a, 30b respectively, axially opposite, with:

- on the first face 30a, said connection 60 in rotation with the annular support 36 and the stop means 62 for rotation with one of said guide washers,

- on the second opposite face 30b, the stop means 64 for rotation with the annular web 24.

In this embodiment, the means 62 of rotation stop provided on the first face 30a of the phasing member 30 each circumferentially define lateral stops 65 cooperating in rotation with side walls 67 of cutouts 69 formed in the inner periphery of the 'one of the guide washers, such as the washer 7a; see Figures 9.14, in particular.

As before, the cutouts 69, for example circumferentially three in number, can be defined by slots formed on the inner periphery of the guide washer concerned.

The rotational link 60 comprises, in this variant, second axial protuberances 71, which extend, axially, respectively the first protuberances which materialize, here, the means 62 for rotation abutment (see Figures 9,13, in particular).

Thus, one can find circumferentially, three double projections 62,71 on the first face 30a.

The second axial protuberances 71 can, as previously, each be engaged axially in an axial orifice of the annular support and riveted there.

As for the means 64 for abutment in rotation with the annular web 24 provided on the second face 30b of the phasing member 30, they are, in this second variant, defined by axial fingers, in this case curved shapes in hooks , 74 each having circumferentially lateral stops 75 cooperating in rotation with lateral walls 77 of cutouts 79 formed at the outer periphery of the annular web 24; see Figures 10.11, in particular.

Claims (10)

1. Torque transmission device for a motor vehicle, comprising: - a first element (7, 6), - a second element (24, 8), the first and second elements (7, 6; 24, 8) being, one a torque input element (7, 6), the other an output element of couple (24, 8), - at least one group of elastic members (10a, 10b) mounted between the first and second elements and designed to act against the rotation of one of said first and second elements, during the rotation of one said first and second elements relative to each other, said elastic members (10a, 10b) bearing, on the one hand, on an annular web (24) belonging to one of said first and second elements, and on the other part on guide washers (7a, 7b) which extend axially on either side of the annular web (24) and which are movable in rotation relative to the annular web (24), the guide washers (7a, 7b) belonging to one of said first and second elements, - a phasing member (30) through which are arranged in series at least one first elastic member (10a) and at least one second elastic member (10b) of said at least one group of elastic members (10a, 10b) , so that these elastic members (10a, 10b) deform in phase with one another, the phasing member (30) being movable relative to each of the first and second elements, - a pendulum damping device (1) comprising an annular support (36) and pendulum masses (35) mounted movably with respect to the annular support (36), which is coupled in rotation with one of said first and second elements, characterized in that the phasing member (30) comprises means (47; 64) for abutment in rotation with the annular web (24), as well as a connection 53, 59; 60) in rotation with the annular support (36), and one of the annular support (36) and the phasing member (30) comprises means (37; 62) for abutment in rotation with one of the washers guide. 2. Device according to claim 1, in which the means of rotation stop of one of the annular support (36) and the phasing member (30) with one of the guide washers comprise axial protuberances (37 ) which is provided with the annular support (36) and which each circumferentially define lateral stops (38) cooperating in rotation with side walls (43) of cutouts (45) formed in one (7b) of the guide washers (7a , 7b). 3. Device according to claim 1 or 2, wherein the means for rotating stop of the phasing member (30) with the annular web (24) comprise radial protrusions (47) formed on a hub (8) of which is provided with the annular web (24) and which each cooperate in rotation with lateral stops (49) defined circumferentially by lateral walls of cutouts (51) formed in the phasing member (30). 4. Device according to one of the preceding claims, in which the annular support (36) comprises: a radially outer annular part (57) on which the pendulum masses (35) and the rotational coupling of the annular support (36) are mounted in a movable manner with one of the guide washers, and - a radially inner washer (55) fixed with the radially outer annular part and which comprises a part (53) of the connection (53, 59) in rotation with the phasing member (30). 5. Device according to one of the preceding claims, in which the rotational connection between the phasing member (30) and the annular support (36) comprises lugs (53) for axial fixing which is provided with the annular support (36 ) and which are fixed with the phasing member (30). 6. Device according to claims 2, 4 and 5, wherein the axial protrusions (37) are carried by the radially inner washer (55) and are extended axially by the lugs (53) for axial fixing. 7. Device according to claim 1, in which the phasing member (30) has first and second faces axially 5 opposite, with: - on the first face, the connection (60) in rotation with the annular support (36) and the means (62) for rotation abutment with one of said guide washers (7a, 7b), - On the second opposite face, the means (64) for rotating stop with the annular veil (24). 8. Device according to claim 7, in which the means (62) for rotation stop provided on the first face of the phasing member (30) each circumferentially define lateral stops (65) cooperating in rotation with side walls ( 67) of 15 cutouts (69) formed in one (7a) of the guide washers. 9. Device according to one of claims 7 and 8, in which the connection (60) in rotation with the annular support (36) comprises second axial protuberances (71) which extend, axially first protuberances which materialize the means (62 ) from stop to 20 rotation with one of said guide washers (7a, 7b). 10. Device according to one of claims 7 to 9, in which the means (64) for rotation stop provided on the second face of the phasing member (30) comprise axial fingers (74) which each define circumferentially side stops (75) 25 cooperating in rotation with side walls (77) of cutouts (79) formed in the annular web (24). 1/9