KR20200135197A - Transmission Device Equipped With At Least a First Damper and a Dynamic Vibration Absorber - Google Patents

Abstract

The present invention relates to a torque transmission device (1) including: a hub (4); a first damper including a web plate (8), and first and second guide rings (5, 6); and a dynamic vibration absorber including a support disk (15) and at least one inertial mass (19) mounted in a vibrating manner on the support disk (15). The torque transmission device (1) includes at least one hysteresis device with friction rings (31, 38) offset outside a space placed between the first and second guide rings.

Description

Transmission Device Equipped With At Least a First Damper and a Dynamic Vibration Absorber

The present invention relates to the field of a torque transmission device such as a clutch disk, and more particularly to a torque transmission device equipped with at least a first damper and a dynamic vibration absorber such as a vibration device.

In the prior art, in particular in FIG. 1 of FR 3009048, a hub intended to be rotationally fixed to a driven shaft, with a friction lining supported by an annular support, and a clutch disk comprising a first torsion damper are described. The first torsion damper comprises a web plate, two guide rings axially arranged on either side of the web plate, and an elastic element interposed circumferentially between the web plate and the two guide rings. The guide ring is rotationally fixed to the annular support, and the web plate is rotationally coupled to the hub. The clutch disk also comprises a vibration device type dynamic vibration absorber comprising a support and vibration capable weight mounted in a vibration manner on the support. In order to optimize the effectiveness of the vibrating device, it is advantageous that the support of the vibrating device is arranged in the torque transmission direction directly behind the elastic element, and consequently is rotationally fixed to the web plate. In Fig. 1 of the document, the vibration device support is fixed to the web plate by the outside of one of the guide rings. This arrangement is difficult to implement.

Thus, in order to facilitate the fixing of the support of the dynamic vibration absorber to the web plate, in particular from Fig. 22 of WO 16/045671, a fixing element passing radially inside of the installation diameter of the elastic element through one of the guide rings is provided. It is also known to use. However, this structure has the disadvantage of reducing the space available between the two guide rings for installation of the hysteresis device(s) intended to dissipate the energy stored in the elastic element through friction. This reduction in the available space results in a reduction in the dimensions of the friction surface of the hysteresis device and/or a reduction in the friction torque that can be applied to the hysteresis device by moving it closer to the rotational axis X of the clutch disk.

The concept underlying the present invention is a transfer of the type described above, in which the support of the dynamic vibration absorber is fixed in a simple manner to the web plate of the damper of the transfer device and provides a hysteresis device having a friction surface having satisfactory dimensions. It is to propose a device.

According to a first object, the torque transmission device of the present invention:

-A hub that can be rotationally fixed to the driven shaft;

-An annular support supporting a friction surface capable of cooperating with a torque transmission mechanism such as a clutch mechanism or a torque limiter;

-A web plate, first and second guide rings arranged axially on either side of the web plate and rotatably movable with respect to the web plate about the axis X, the web plate and the first and second guides A first damper including a first elastic element interposed circumferentially between the rings to transmit torque between the web plate and the first and second guide rings, the web plate being capable of driving the hub to rotate, and the first and The second guide ring is rotationally fixed to the annular support; And

-A dynamic vibration absorber comprising a support disk and at least one inertial mass mounted in a vibrating manner on the support disk,-the support disk and the second guide ring are axially arranged on either side of the first guide ring, The support disk is fixed to the web plate by a plurality of fixing elements passed through the first guide ring,

The torque transmission device includes an offset hysteresis device configured to exert a friction torque for at least one angular range of relative movement between the hub and the first and second guide rings, the offset hysteresis device being axially arranged between the guide rings. And a friction ring positioned axially outside the space positioned as.

The term "offset hysteresis device" means a hysteresis device in which the friction ring is located axially outside the space in which the friction ring is axially located between the guide rings.

Further, in the meaning of this document, a hysteresis device configured to exert a friction torque for at least one angular range of relative movement between the hub and the first and second guide rings, wherein the web plate is applied to the first and second guide rings. It is a hysteresis device that exerts a friction torque when rotated relative to and/or when the web plate is rotated relative to the hub.

Such a transmission device is simple to implement using the fastening element passing through the first guide ring to fix the support disk to the web plate, secondly, the space where the friction ring is the most full, i.e. the first and There is an advantage that it is not arranged in the axial space provided between the second guide rings.

According to another advantageous embodiment, such a torque transmission device may have one or more of the following features.

According to one embodiment, the annular support supports the friction lining.

According to one embodiment, the friction ring is located on the same side as the support disk, in the space located axially between the guide rings.

According to one embodiment, the friction ring is located axially between the first guide ring and the support disk. Since the axial space provided between the support disk and the first guide ring is less full than the axial space arranged between the first and second guide rings, this arrangement does not increase the axial dimension of the torque transmission device and is satisfactory. It makes it possible to use friction rings with radial dimensions.

According to one embodiment, the friction ring comprises an opening, such as an orifice or indent, through which the fixing element passes for rotationally fixing the friction ring to the web plate. Thus, the friction ring is rotationally fixed to the web plate in a simple manner without additional fastening elements.

According to one embodiment, the friction ring is rotationally fixed to the web plate and pressed against the friction surface of the first guide ring or hub by means of an elastic ring.

According to one embodiment, the support ring is axially held at a distance from the web plate by a plurality of fastening elements.

Advantageously, the elastic ring is seated directly or indirectly on the support disk for pressing the friction ring against the friction surface of the first guide ring or hub.

According to one embodiment, the offset hysteresis device is a first hysteresis device configured to exert a friction torque during relative rotation of the first and second guide rings with respect to the web plate.

According to one embodiment, the friction ring is rotationally fixed to the web plate, and the torque transmission device further comprises a support ring positioned axially between the first guide ring and the support disk and held axially with respect to the web plate. The elastic ring is axially positioned between the friction ring and the support ring, and is axially supported on the friction ring and the support ring to press the friction ring against the first guide ring.

According to one embodiment, the elastic ring directly supports the support ring.

According to one embodiment, the fastening element comprises a first collar that holds the supporting disk at a distance from the web plate.

According to one embodiment, the fixing element comprises a second collar that holds the support ring at a distance from the support disk.

According to one embodiment, the support ring is rotationally fixed to the web plate. According to one embodiment, the fixing element passes through an opening provided in the guide ring for rotationally fixing the support ring to the web plate.

According to one embodiment, in the opposite direction of the web plate, the support ring is supported against a shoulder provided on the fixing element for holding the support ring against the web plate. Thus, the fixing element also serves to provide axial support for the support disk.

According to an embodiment not shown, the support ring is supported against the support disk to hold the support ring against the web plate.

According to another embodiment not shown, the elastic ring is supported directly against the shoulder provided on the fastening element.

According to one embodiment, the friction ring is rotationally fixed to the web plate, and the first hysteresis device is also positioned axially between the friction ring and the support disk and includes the friction ring to press the friction ring against the first guide ring. It includes an elastic ring supported in the axial direction on the support ring.

Advantageously, the elastic ring is supported directly on the support disk.

According to one embodiment, the torque transmission device also includes a second damper comprising a second elastic element configured to transmit torque between the hub and the web plate, and friction between the hub and the web plate during relative rotation between the hub and the web plate. And a second hysteresis device configured to exert a torque.

According to one embodiment, the offset hysteresis device is a second hysteresis device configured to exert a friction torque during relative rotation between the hub and the web plate.

According to one embodiment, the hub comprises a first outer tooth that is arranged on the hub and protrudes radially outward with respect to the axis X and an inner tooth that engages with a circumferential play.

According to one embodiment, the hub comprises a second outer tooth for receiving a second elastic element.

According to one embodiment, the first outer teeth for web plate/hub engagement are arranged in the same plane as the second outer teeth receiving the second elastic element.

According to one embodiment, the torque transmission device comprises a first hysteresis device configured to exert a friction torque between the first guide ring and the web plate during relative rotation of the first and second guide rings with respect to the web plate, and the torque transmission The device comprises an annular flange, the annular flange having an annular flange and an indent through which the fixing element passes for rotationally fixing the web plate, the annular flange being arranged circumferentially between the indentation, the web plate and the first It is inserted between the guide rings and includes a lug in frictional contact with the first guide ring.

According to one embodiment, the lug projects radially outwardly beyond the average installation diameter of the fastening element. This arrangement is advantageous in that it is possible to increase the average radius of application of the friction ring in order to increase the resistive torque generated by the annular flange despite the presence of a fastening element passing through the annular flange.

According to one embodiment, the torque transmission device is also rotationally fixed to the web plate and interposed between the web plate and the web plate with another friction ring axially interposed between the web plate and the second guide ring, and And another elastic ring for pressing the other friction ring against the second guide ring.

According to one embodiment, the annular flange also comprises a cavity for receiving a second elastic element, and the second elastic element of the second damper is on the hub and the support zone provided on the annular flange during the relative rotation between the web plate and the hub. It is configured to be compressed between the teeth of the second outer teeth provided on each.

According to one embodiment, the friction ring comprises an axial finger inserted into a notch provided in the support disk for rotationally fixing the friction ring to the support disk.

According to one embodiment, the hub includes external teeth projecting radially outwardly with respect to axis X, and one of the axial ends of the external teeth forms a friction surface of the hub on which the friction ring is pressed.

This external tooth may be a first external tooth or a second external tooth.

According to one embodiment, the fixing element is a stud, each stud comprising a central portion forming a strut between the support disk and the web plate, and has two heads, one of which is inserted into a hole provided in the support disk. And clamped against the support disk to hold the head against the central portion of the stud, the other head inserted into the hole provided in the web plate, and clamped against the web plate to hold the head against the central portion of the stud.

According to one embodiment, the fixing element passes through the first guide ring with the possibility of angular movement relative to the first guide ring.

According to one embodiment, the dynamic vibration absorber is a vibration device comprising several inertial masses mounted in a vibration manner on a support disk.

According to another embodiment, the dynamic vibration absorber is an inertial damper comprising an inertial mass mounted on a support disk in a vibrating manner, and a helical spring against the relative rotation of the inertial mass with respect to the support disk.

According to one embodiment, the torque transmission device is a clutch disk, and the annular support supports the lining.

According to a second object, the torque transmission device of the present invention:

-A hub that can be rotationally fixed to the driven shaft;

-An annular support having a friction surface capable of cooperating with a torque transmission mechanism such as a clutch mechanism or a torque limiter;

-A web plate, first and second guide rings arranged axially on either side of the web plate and rotatably movable with respect to the web plate about the axis X, the web plate and the first and second guides A first damper including a first elastic element interposed circumferentially between the rings to transmit torque between the web plate and the first and second guide rings, the web plate being capable of driving the hub to rotate, and the first and The second guide ring is rotationally fixed to the annular support; And

-A dynamic vibration absorber comprising a support disk and at least one inertial mass mounted in a vibrating manner on the support disk,-the support disk and the second guide ring are axially arranged on either side of the first guide ring, The support disk is fixed to the web plate by a plurality of fixing elements,

The torque transmission device comprises at least one hysteresis device configured to exert a friction torque for at least one angular range of relative movement between the hub and the first and second guide rings, the hysteresis device comprising the friction element to the web plate And a friction element including an opening, such as an indentation or orifice, through which the fixing element passes for rotationally fixing the fixing element.

Thus, the fastening element has a dual function, ie firstly securing the support disk to the web plate, and secondly ensuring the rotational drive of the friction element of the hysteresis device relative to the hub and/or guide ring. Therefore, such a torque transmission device is particularly simple to produce.

This aspect may also include one or more of the features mentioned above for the first purpose, ie:

-The fixing element passes through the first guide ring.

-The torque transmission device is a clutch disc, and the annular support supports the lining.

-The hysteresis device is a first hysteresis device configured to exert a friction torque between the first guide ring and the web plate upon rotation of the first and second guide rings relative to the web plate.

-The friction element is an annular flange and an annular flange having an indentation through which the fixing element passes for rotationally fixing the web plate.

-The friction element comprises a lug between the openings in the circumferential direction, which lug is inserted between the web plate and the first guide ring and is in frictional contact against the first guide ring, the lug exceeding the average installation diameter of the fixed element. It protrudes radially outward.

-The friction element is a friction ring.

-The friction ring is located axially outside the space located axially between the guide rings.

-The friction ring is pressed against the friction surface of the first guide ring or of the hub by means of an elastic ring.

According to a third aspect, the torque transmission device of the present invention:

-A hub that can be rotationally fixed to the driven shaft;

-An annular support having a friction surface capable of cooperating with a torque transmission mechanism such as a clutch mechanism or a torque limiter;

-A web plate, first and second guide rings arranged axially on either side of the web plate and rotatably movable with respect to the web plate about the axis X, the web plate and the first and second guides A first damper including a first elastic element interposed circumferentially between the rings to transmit torque between the web plate and the first and second guide rings, the web plate being capable of driving the hub to rotate, and the first and The second guide ring is rotationally fixed to the annular support; And

-A dynamic vibration absorber comprising a support disk and at least one inertial mass mounted in a vibrating manner on the support disk,-the support disk and the second guide ring are axially arranged on either side of the first guide ring, The support disk is secured to the web plate by a plurality of fastening elements passing through the first guide ring; The support disk is axially held at a distance from the web plate by a plurality of fastening elements; The torque transmission device comprises a hysteresis device configured to exert a frictional torque for at least one angular range of relative movement between the hub and the first and second guide rings; The hysteresis device comprises a friction ring which is rotationally fixed to the web plate and pressed against the friction surface of the first guide ring or of the hub by means of an elastic ring; The resilient ring of the hysteresis device is supported directly or indirectly on the support disk for pressing the friction ring against the friction surface of the first guide ring or of the hub.

According to one embodiment, the annular flange also comprises a cavity for receiving a second elastic element, the second elastic element being a support zone provided on the annular flange during relative rotation between the web plate and the hub and a second elastic element provided on the hub. It is configured to be compressed between the teeth of the outer teeth, respectively.

According to one embodiment, the present invention provides a vehicle, in particular a motor vehicle comprising a torque transmission device according to any of the foregoing embodiments.

The present invention will be better understood, and other objects, details, features and advantages of the present invention will be more apparent from the following description of some specific embodiments of the present invention, which are provided by way of non-limiting illustration only with reference to the accompanying drawings. Will become.
1 is an exploded perspective view of a clutch disk according to a first embodiment.
FIG. 2 is a cross-sectional view of the clutch disk from FIG. 1 in a radial plane.
3 is an exploded perspective view of a clutch disk according to a second embodiment.
4 is a cross-sectional view of the clutch disc from FIG. 3 in a radial plane.
5 is a cross-sectional view in a radial plane of a clutch disk according to a third embodiment.

In the description and claims, the terms "outer" and "inside" and also the orientations "axial" and "radial" will be used to designate the elements of the clutch disc according to the definitions provided in the description. Typically, the "radial" orientation is oriented orthogonal to the axis of rotation (X) of the clutch disk which determines the "axial" orientation, and the "circumferential" orientation is orthogonal to the axis (X) and orthogonal to the radial direction. Is oriented. The terms "outside/outside" and "inside/inside" are used to define the relative position of one element to another with reference to the axis of rotation (X) of the clutch disc; Thus, an element close to the axis X is defined inwardly or inwardly against an outer or outer component positioned radially around it.

The clutch disk is intended to be rotationally fixedly mounted on a driven shaft such as a gearbox input shaft and to be associated with the clutch mechanism, i.e. to be arranged in the transmission chain between the pressure plate and the reaction plate of the clutch mechanism, the plates being the crank of the internal combustion engine. It is rotationally fixed to the same drive shaft as the shaft. During the clutch engagement operation, the pressure plate clamps the friction lining of the clutch disc against the reaction plate to allow transmission of torque between the drive shaft and the driven shaft.

1 and 2, the clutch disk 1 according to the first embodiment will be described.

The clutch disk 1 comprises an annular support 2, on each of the faces of the annular support, a friction lining 3 intended to be clamped between the pressure plate and the reaction plate is supported. The friction lining 3 is riveted to the outer part of the annular support 2.

Further, the clutch disk 1 comprises a hub 4 which can be rotationally fixed to a driven shaft (not shown). To this end, the hub 4 has a longitudinal spline which is arranged on the inner surface of the hub 4 and is intended to cooperate with a complementary spline arranged on the driven shaft.

The clutch disc 1 comprises a first damper, referred to as a main damper hereinafter, and a second damper, referred to as a pre-damper hereinafter. Preferably, the pre-damper serves to dampen vibrations produced by the engine at low speeds when the gearbox is in neutral, while the main dampers serve to dampen vibrations corresponding to different modes of operation of the engine.

The main damper is axially positioned between the first and second guide rings 5 and 6 fixed together by a plurality of struts 7 and the first and second guide rings 5 and 6, and the guide ring It includes a web plate (8) rotatably movable with respect to (5, 6). The annular support 2 supporting the friction lining 3 is fixed to one of the guide rings 5, 6, here first guide ring 5, for example via rivets.

The second guide ring 6 is centered on the hub 4 by means of a bearing 9 which helps center the main damper with respect to the hub 4. The bearing 9 is rotationally fixed to the second guide ring 6. To this end, in the illustrated embodiment, the bearing 9 comprises a tab surrounded by a complementary orifice of the second guide ring 6.

In addition, the main damper is interposed in the circumferential direction between the web plate 8 and the first and second guide rings 5 and 6, and between the web plate 8 and the first and second guide rings 5 and 6 It comprises an elastic element 10 that allows the transmission of torque in the. In the illustrated embodiment, the elastic element 10 comprises a straight helical spring distributed circumferentially with the same diameter around the axis X. In the embodiment variant shown, the main damper comprises four elastic elements 10, each of which is formed of two helical springs, one coaxially arranged inside the other.

The web plate 8 and the first and second guide rings 5, 6 each comprise a window for receiving an elastic element 10. The opposite circumferential end of the window has a radial zone that carries a support zone intended to support the ends of the elastic element 10.

In operation, when the torque is transmitted in a direct direction, i.e. from the guide rings 5, 6 to the web plate 8, or in the opposite direction, i.e. from the web plate 8 to the guide rings 5, 6, One of the ends of each of the elastic elements 10 is supported against the two support zones of the guide rings 5 and 6, while the other end is supported against the support zones of the web plate 8.

The main damper also comprises a hysteresis device, described below, configured to exert a friction torque between the guide rings 5 and 6 and the web plate 8 during relative rotation therebetween. Thus, the hysteresis device dissipates the energy accumulated in the elastic element 10 by friction.

The web plate 8 is mounted around the hub 4. Further, the web plate 8 is engaged with the first external teeth disposed around the outer periphery of the hub 4 with a circumferential play. Thus, the web plate 8 is rotatable with respect to the hub 4 until the circumferential play is absorbed. The web plate 8 is itself rotationally fixed to the web plate 8 and comprises an inner tooth 11 positioned facing the second outer tooth 12 provided around the outer periphery of the hub 4. It is rotationally fixed to the annular flange 13.

The pre-damper rotates the web plate 8 and the hub 4 as long as the relative movement between the web plate 8 and the hub 4 remains within a range corresponding to the circumferential play. The pre-damper comprises an elastic element 17 configured to transmit torque between the web plate 8 and the hub. In the embodiment of FIGS. 1 and 2 the elastic element 17 is a helical spring. The helical spring is circumferentially received between the teeth of the second external teeth 12 arranged around the outer periphery of the hub 4 and between the teeth of the flange teeth. Helical springs are respectively inserted into respective cavities 18 provided in the annular flange 13 between the teeth of the inner teeth 11 of the annular flange 13. The circumferential end of the cavity 18 is formed by the teeth of the inner teeth 11, forming a support sheet intended to support the ends of the elastic element 17.

In the illustrated embodiment, the web plate 8 is fixed to the support disk 15 and the fixing elements 14 to be described later are respectively provided on the annular flange 13 and the annular flange 13 to the web plate 8. It passes through each indentation 16 to be fixed in rotation.

Thus, in operation, when the torque passing through the clutch disc 1 is low, for example when the gearbox is in neutral, each of the elastic elements 17 is the teeth of the second outer teeth 12 of the hub 4 And the teeth of the inner teeth 11 of the annular flange 13.

The pre-damper also comprises a hysteresis device, described below, configured to exert a friction torque between the hub 4 and the web plate 8 during relative rotation therebetween. Thus, the hysteresis device dissipates the energy accumulated in the elastic element 17 by friction.

The clutch disk 1 also includes a dynamic vibration absorber. In the illustrated embodiment, the dynamic vibration absorber is a vibration device. The vibrating device comprises a supporting disk 15 and several inertial masses referred to as vibrating weights 19 supported in a vibrating manner on the supporting disk 15. In the illustrated embodiment, two vibrable weights 19 are regularly distributed on the support disk 15 and are mounted to vibrate against the support disk 15 in a plane orthogonal to the rotation axis X.

In the illustrated embodiment, each of the vibrating weights 19 is arranged axially on either side of the support disk 15 and passes through one or more openings provided in the support disk 15. It has two flanks (20, 21) axially connected together by struts (22).

The vibration of the vibrating weight 19 is guided by guiding means not shown in FIGS. 1 and 2. For each vibrable weight 19, the guiding means comprises two bearing elements, each cooperating with a first raceway supported by the vibrating weight 19 and a second raceway supported by the support disk 15. Include. According to one embodiment, the first raceway is disposed on the outer surface of the link strut 22 while the second raceway is disposed on the outer edge of the opening through which the link strut 22 passes. The first and second raceways generally have an epicycloid or circular shape. The shape of the raceway is configured such that the vibrating weight 19 is adjusted to an order assuming a value close to the order of the dominant harmonic vibration generated by the engine.

In another embodiment (not shown), the dynamic vibration absorber is an inertial damper. Such an inertial damper includes an inertial mass mounted in a vibrating manner on a support disk, and a helical spring against the relative rotation of the inertial mass with respect to the support disk.

The support disk 15 is rotationally fixed to the web plate 8 and fixed axially. The supporting disk 15 is fixed to the web plate 8 by means of a plurality of fastening elements 14 passing through the first guide ring 5. In the embodiment shown in FIGS. 1 and 2, the fastening element 14 passes through the central opening of the first guide ring 5. The fastening element 14 is a strut comprising a central portion 23 and two heads 24, 25, forming a strut between the support disk 15 and the web plate 8. One of the heads 24 is inserted into a hole provided in the support disk 15, and is clamped against the support disk 15 to hold the head against the central part 23, and the other head 25 is a web It is inserted into a hole provided in the plate 8 and clamped against the web plate 8 to hold the head against the central portion 23.

The hysteresis device of the main damper comprises another friction ring 26 arranged axially between the web plate 8 and the second guide ring 6. This other friction ring 26 is rotationally fixed to the web plate 8. To this end, the friction ring 26 comprises axial fingers 27 which are received in a notch 2 provided in the web plate 8. In addition, the hysteresis device comprises another elastic ring 29 arranged axially between the web plate 8 and the friction ring 26. Thus, the elastic ring 29 is supported primarily with respect to the web plate 8 and secondly with respect to the friction ring 26 in the axial direction, such that the friction ring 26 is supported with respect to the second guide ring 6. Pressurize in the axial direction. Thus, during the relative rotation of the web plate 8 with respect to the guide rings 5 and 6, the friction ring 26 rubs against the second guide ring 6.

The friction ring 26 is optionally made of a plastic material reinforced by fibers. The friction ring 26 can also be made of steel. The elastic ring 29 is a cup-shaped washer typically made of metal.

Further, the annular flange 13 described above comprises a friction surface in frictional contact with the first guide ring 5. To this end, the annular flange 13 includes a lug 30 between the indentations 16, the lugs protruding radially toward the outside, and between the first guide ring 5 and the web plate 8 Are arranged in the axial direction. Since the two guide rings 5 and 6 are axially linked to each other, an elastic ring that is supported against the web plate 8 and attempts to press the friction ring 26 against the second guide ring 6 29 also has the effect of exerting an elastic force aimed at bringing the web plate 8 closer to the first guide ring 5. This causes the radial friction surface of the lug 30 to rub against the first guide ring 5. Advantageously, the radial frictional surface of the lug 30 projects radially outwardly beyond the average installation diameter of the fastening element 14. This arrangement will increase the dimension of the friction surface and its average applied radius in order to increase the resistive torque generated by the annular flange 13 despite the presence of the fastening element 14 passing through the annular flange 13. It is advantageous in that it can. The annular flange 13 is advantageously made of a plastic material optionally reinforced by fibers.

The hysteresis device of the pre-damper comprises a friction ring 31 which is offset and arranged axially between the support disk 15 and the first guide ring 5. This positioning of the friction ring 31 within the gap between the support disk 15 and the first guide ring 5 makes this space less tight than the axial space between the two guide rings 5 and 6. It is advantageous in that it is cold. Thus, the friction surface of the friction ring 31 may have a larger dimension and/or be located further from the axis X to increase the resistance friction torque. The friction ring 31 is rotationally fixed to the web plate 8. To this end, the friction ring 31 comprises an axial finger 32 received in a notch 33 provided in the support disk 15, the support disk being attached to the web plate 8 by means of a fixing element as described above. Rotation is fixed.

The friction ring 31 is in frictional contact with one of the axial ends of the teeth of the second outer teeth 12 provided on the hub 4.

In addition, the hysteresis device of the pre-damper also comprises an elastic ring 34 arranged axially between the support disk 15 and the friction ring 31. Thus, the elastic ring 34 is primarily supported axially with respect to the support disk 15 and secondly with respect to the friction ring 31, thereby securing the friction ring 31 of the second outer teeth 12. It is pressed in the axial direction against the axial end. Thus, during the rotation of the web plate 8 relative to the hub 4, the friction ring 31, which is rotationally fixed to the friction web 8, is rubbed against the hub 4.

Similar to the friction ring 26 and the elastic ring 29 of the hysteresis device associated with the main damper, the friction ring 31 is advantageously made of a plastic material optionally reinforced by fibers, while the elastic ring 34 Is a cup-shaped washer typically made of metal. The friction ring 31 can also be made of steel.

3 and 4, a clutch disk 1 according to the second embodiment will be described later. This embodiment is different from that described above with respect to Figs. 1 and 2 in the structure of the pre-damper and the hysteresis device of the main damper and pre-damper.

The hysteresis device of the main damper comprises a stack of washers which are offset and arranged axially between the support disk 15 and the first guide ring 5. More specifically, the clutch disk includes a support ring 35 which is rotationally fixed to the web plate 8. To this end, in the illustrated embodiment, the fastening element 14 passes through an opening 36 provided in the support ring 35. Further, the support ring 35 is held axially with respect to the web plate 8. To this end, as shown in FIG. 4, the central portion 23 of the fixing element 14 comprises a shoulder, and the support ring 35 is supported against the shoulder in the direction of the support disk 15.

In addition, the hysteresis device of the main damper also comprises an elastic ring 37 and a friction ring 38 pressed against the first guide ring 5 by means of the elastic ring 37.

The friction ring 38 is rotationally fixed to the web plate 8. To this end, the friction ring 38 comprises an opening such as an indentation 39 through which the fastening element 14 passes.

Further, the elastic ring 37 is primarily supported axially with respect to the support ring 35 so that the support ring 35 can be seated and held against the shoulder provided in the central portion 23 of the fixing element 14. The friction ring 38 is secondarily supported against the friction ring 38 to press the friction ring 38 against the first guide ring 5.

In an alternative embodiment (not shown), it is also possible that the support ring 35 is not supported against a shoulder provided on the fastening element 14 but directly axially against the support disk 15.

The hysteresis device of the main damper also comprises another friction ring 45 interposed axially between the first guide ring 5 and the web plate 8. This friction ring comprises an opening, such as an indentation 46, a fastening element passing through the indentation to rotationally fix the friction ring to the web plate 8. Under the axial force exerted by the elastic ring 37, the first guide ring is pressed against the friction ring 45. In the illustrated embodiment, the indentation 46 is provided at the radially inner edge of the friction ring 45, so that the contact surface of the friction ring with respect to the first guide ring 5 is the average of the fixing element 14 It extends radially outward beyond the installation diameter.

In addition, the elastic elements 17 of the pre-damper are arranged axially in the plane of the web plate 8 and/or each elastic element is of the second outer teeth 12 provided around the outer periphery of the hub 4. It is received between the two teeth and between the two teeth of the inner teeth 11 provided on the inner edge of the web plate 8. Thus, when in operation the torque passes through the pre-damper, each of the elastic elements 17 has one of the teeth of the second outer teeth 12 of the hub 4 and the inner teeth of the web plate 8 ( It is compressed to be supported against one of the teeth of 11).

The hysteresis device of the pre-damper comprises a friction ring 40 arranged axially between the first guide ring 5 and the axial end of the second outer tooth 12 of the hub 4. The friction ring 40 is rotationally fixed to the first guide ring 5. To this end, the friction ring 40 comprises an axial finger 41 received in a notch 42 provided in the first guide ring 5. In addition, the hysteresis device comprises an elastic ring 43 arranged in the axial direction between the first guide ring 5 and the friction ring 40. The elastic ring 43 is primarily against the first guide ring 5 and 2 to axially press the friction ring 40 against the axial end of the second outer teeth 12 provided on the hub. It is primarily supported axially with respect to the second friction ring 40.

The embodiment shown in Fig. 5 is in Figs. 3 and 4 in that the elastic ring 37 is not supported axially with respect to the support ring 35, but is directly supported axially with respect to the support disk 15. It is different from the embodiment described above for. To this end, the support disk 15 includes a boss 44 that projects axially in the direction of the first guide ring 5 and comprises a radially oriented surface forming a support surface for the elastic ring 37 do. The elastic ring 37 is also supported against the friction ring 38, pressing the friction ring 38 axially against the first guide ring 5.

While the present invention has been described with reference to several specific embodiments, it is apparent that the present invention is not limited thereto, and includes all technical equivalents of the described means and combinations thereof where they are within the scope of the present invention.

For example, in another variation, the transmission device may relate to a torque limiting mechanism rather than a clutch mechanism. In this case, for example, the annular support can be clamped between the pressure plate and the reaction plate under the action of an elastic load supplied, for example by a cup-shaped washer.

The use of the verbs “consist of”, “contains” or “comprises” and their complex forms does not exclude the presence of elements or steps other than those recited in the claims.

In the claims, any reference signs between parentheses should not be construed as limiting the claims.

1: torque transmission device
2: annular support
3: friction surface
4: hub
5, 6: first and second guide rings
8: web plate
15: support disk
31, 38: friction ring
34, 37: elastic ring

Claims (15)

In the torque transmission device (1),
-A hub 4 which can be rotationally fixed to the driven shaft;
-An annular support 2 supporting a friction surface 3 capable of cooperating with a torque transmission mechanism such as a clutch mechanism or a torque limiter;
-A web plate 8 and first and second guide rings 5 arranged axially on either side of the web plate 8 and rotatable about the web plate 8 about the axis X , 6) and, interposed circumferentially between the web plate 8 and the first and second guide rings 5, 6, and between the web plate 8 and the first and second guide rings 5, 6 A first damper comprising a first elastic element 10 for transmitting torque-the web plate 8 is capable of rotationally driving the hub 4, the first and second guide rings 5, 6 being annular Rotationally fixed to the support 2 -; And
-A dynamic vibration absorber comprising a support disk 15 and at least one inertial mass 19 mounted in a vibration manner on the support disk 15-the support disk 15 and the second guide ring 6 A web plate (8) arranged axially on either side of the first guide ring (5), said support disk (15) by means of a plurality of fastening elements (14) which are passed through the first guide ring (5). Includes ― fixed to,
The torque transmission device 1 comprises an offset hysteresis device configured to exert a frictional torque for at least one angular range of relative movement between the hub 4 and the first and second guide rings 5, 6, The offset hysteresis device comprises a friction ring (31, 38) located axially outside the space located axially between the guide rings (5, 6).
Torque transmission device. The method of claim 1,
The friction rings (31, 38) are located on the same side as the support disk (15) of the space located in the axial direction between the guide rings (5, 6).
Torque transmission device. The method according to claim 1 or 2,
The friction rings (31, 38) are located axially between the first guide ring (5) and the support disk (15).
Torque transmission device. The method according to any one of claims 1 to 3,
The friction ring 38 comprises an opening such as an orifice or indentation through which the fixing element 14 passes for rotationally fixing the friction ring 37 to the web plate 8.
Torque transmission device. The method according to any one of claims 1 to 4,
The friction rings (31, 38) are rotationally fixed to the web plate (8), and pressed against the friction surface of the first guide ring (5) or of the hub (4) by means of elastic rings (34, 37).
Torque transmission device. The method of claim 5,
The support disk (15) is held axially at a distance from the web plate (8) by a plurality of fastening elements (14), the elastic rings (34, 37) being of the first guide ring (5) or hub (4) directly or indirectly seated on the support disk 15 to press the friction rings 31, 38 against the friction surface of
Torque transmission device. The method according to claim 5 or 6,
The offset hysteresis device is a first hysteresis device configured to exert a friction torque during the relative rotation of the first and second guide rings 5, 6 with respect to the web plate 8, the friction ring 38 being a web Rotating fixed to the plate (8), the torque transmission device is also a support ring positioned axially between the first guide ring (5) and the support disk (15) and held axially with respect to the web plate (8) (35), wherein the elastic ring (37) is axially positioned between the friction ring (38) and the support ring (35), so as to press the friction ring (38) against the first guide ring (5). Axially supported on the friction ring 38 and the support ring 35
Torque transmission device. The method of claim 7,
In the opposite direction of the web plate (8), the support ring (35) is supported against a shoulder provided on the fixing element (14) to hold the support ring (35) against the web plate (8).
Torque transmission device. The method according to any one of claims 1 to 4,
The offset hysteresis device is to exert a friction torque between the first guide ring 5 and the web plate 8 during the relative rotation of the first and second guide rings 5 and 6 with respect to the web plate 8. It is a configured first hysteresis device; The friction ring 38 is rotationally fixed to the web plate 8, and the first hysteresis device is also positioned axially between the friction ring 38 and the support disk 15 and provides a friction ring 38. It comprises a friction ring 38 and an elastic ring 37 axially supported on the support disk 15 so as to press against the first guide ring 5.
Torque transmission device. The method according to any one of claims 1 to 6,
A second damper comprising a second elastic element 17 configured to transmit torque between the hub 4 and the web plate 8, and the hub 4 during relative rotation between the hub 4 and the web plate 8 ) And a second hysteresis device configured to exert a friction torque between the web plate 8
Torque transmission device. The method of claim 10,
The offset hysteresis device is a second hysteresis device configured to exert a friction torque during the relative rotation between the hub 4 and the web plate 8.
Torque transmission device. The method of claim 11,
A first hysteresis configured to exert a friction torque between the first guide ring 5 and the web plate 8 during the relative rotation of the first and second guide rings 5, 6 with respect to the web plate 8 A device further comprising a device, the first hysteresis device comprising an annular flange (13), the annular flange (13) having a fixing element (14) for rotationally fixing the annular flange (13) and the web plate (8). Having an indentation 16 passing through, the annular flange 13 is arranged in a circumferential direction between the indentations 16, and is inserted between the web plate 8 and the first guide ring 5, and 1 comprising a lug 30 in frictional contact with the guide ring 5
Torque transmission device. The method of claim 12,
The lug 30 protrudes radially outward beyond the average installation diameter of the fixing element 14
Torque transmission device. The method according to any one of claims 1 to 13,
The friction ring 31 includes an axial finger 32 inserted into a notch 33 provided in the support disk 15 for rotationally fixing the friction ring 31 to the support disk 15.
Torque transmission device. The method according to any one of claims 1 to 14,
The hub 4 includes teeth 12 protruding radially outward with respect to the axis X, and one of the axial ends of the outer teeth 12 is a friction ring 31 to which the friction ring 31 is pressed. Forming the friction surface (4) of the hub, the second elastic element (17) of the second damper being received in the outer teeth (12)
Torque transmission device.

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