KR102575100B1 - Device for damping of torsional oscillations - Google Patents

Abstract

- a support (2);
- at least one pendulum body (3) comprising two pendulum masses (5) and at least one connecting member (6) connecting said first and second pendulum masses (5) to mate them;
- at least two rolling elements 11 coupled to the pendulum body 3, each of the at least two rolling elements 11 on the one hand cooperating with a rolling track 12 defined on the support body 2 and on the other hand the at least two rolling members 11 guiding the displacement of the pendulum body 3 relative to the support body 2 in cooperation with a rolling track 13 defined by the pendulum body 3 as
- an insertion element (30) with an insertion part (33) disposed axially between one of the pendulum masses (5) and the support body (2), which insertion part is a single element and is connected to the pendulum mass (5). A torsion vibration damping device (1) comprising an insert member (30) having an insert surface (34) selected to prevent axial contact with the respective rolling member (11).

Description

Torsion vibration damping device {DEVICE FOR DAMPING OF TORSIONAL OSCILLATIONS}

The present invention relates in particular to a torsion vibration damping device for a transmission system of a motor vehicle.

In this field, a torsion vibration damping device is integrated into a torsion damping system of a clutch that can selectively connect an internal combustion engine to a gearbox, so as to filter vibrations due to acyclism of the engine.

In a variant, in this field, the torsional vibration damping device can be integrated into the friction disk of the hydraulic torque converter or clutch.

Such torsional vibration damping devices typically use a support and one or a plurality of pendulum bodies movable relative to the support, the displacement of the pendulum body relative to the support on the one hand cooperating with a rolling track integral with the support. and on the other hand guided by a rolling member cooperating with a rolling track integral with the pendulum body. Each pendulum body comprises, for example, two pendulum masses riveted together.

An axial impact may occur between the support and the pendulum body. This impact can lead to premature wear of the above-mentioned elements of the damping device and/or to generate unwanted noise, especially if these elements are made of metal.

In order to prevent the occurrence of such shocks, it is known, for example, from application DE 10 2006 028 556 to arrange a pad between the support and the pendulum mass of the pendulum body in the axial direction. However, these pads cannot overcome the axial impact that may occur between the rolling element or rolling elements and one and/or the other of the pendulum mass of the pendulum body.

There is a need for improvement of an axial pad capable of resolving an axial impact that may occur between a rolling member and a pendulum body.

The present invention aims to address this need and according to one of its aspects the present invention provides:

- a support capable of being displaced by rotation about an axis;

- at least one pendulum mass comprising first and second pendulum masses movable relative to the support and axially spaced apart from each other, and at least one connecting member connecting the first and second pendulum masses to mate them; at least one pendulum body, wherein the first pendulum mass is axially disposed on a first side of the support and the second pendulum mass is axially disposed on a second side of the support;

- at least one first and second rolling member coupled to the pendulum body, wherein each of the at least one first and second rolling member cooperates with a rolling track defined on the support on the one hand and on the other hand the pendulum body said at least one first and second rolling member for guiding the displacement of said pendulum body relative to said support in cooperation with a rolling track defined by; and

- an insert member having an insert disposed axially between one of the pendulum masses and the support, the insert being a single member and selected to prevent axial contact of the pendulum mass and the respective rolling member. The above object is achieved by a torsional vibration damping device comprising the insertion member having an insertion surface.

The invention also relates to said insert member, which is considered separately.

The insertion member is inserted axially so that there is an axial clearance between the rolling member and the pendulum mass to which it is coupled. Such an insertion member may prevent contact between the pendulum mass and the rolling member, which would cause premature wear of the member and unwanted noise, for at least some of the relative positions of the pendulum body and the support body.

This insertion element enables distribution of the collar formed on the rolling element, in particular for axial retention of the rolling element. It is known from the prior art that these collars co-operate with the support and pendulum mass to limit axial movement and to co-operate with the rolling track to retain the rolling element. Distributing these colors facilitates the manufacture of rolling elements.

The insertion member is reciprocal to the two rolling members. This makes it possible to reduce the number of parts required in the device and, accordingly, to reduce the number of operations in installing the device.

The insert is made of a cushioning material, in particular plastic or rubber.

The insertion member may be installed on one of the support body and the pendulum mass. Placing the insertion member on the rolling member is complex because of the dimensional limitations of the rolling member. The fact that the rolling element rolls on the rolling track prevents the coupled installation of the insert on the rolling element.

The insertion member may be fixedly installed on one of the support and the pendulum mass.

An insertion surface of the insertion portion may be continuous. This insertion face may be planar without axial projections oriented towards the support.

In the meaning of this application:

- "axially" means "parallel to the axis of rotation of the support";

- "radially" means "along an axis perpendicular to the axis of rotation of the support and belonging to a plane intersecting the axis of rotation of this support";

- "angularly" or "circumferentially" means "around the axis of rotation of the support";

- "Integral" means "strongly coupled",

- "Direction" shall be included in the vector direction.

The "pendulum mass" refers to the pendulum mass to which the insertion member is coupled unless otherwise specified.

The insertion surface,

- only axial contact of the first rolling member and the pendulum mass for a specific relative position of the pendulum body and the support;

- it may be selected to prevent only axial contact of the pendulum mass with the second rolling member relative to other relative positions of the pendulum body and the support.

The insertion member may, for example, be continuously inserted only between the pendulum mass and the first rolling member and then only inserted between the pendulum mass and the second rolling member.

The insertion surface may also be selected to simultaneously prevent axial contact of each of the rolling members on the one hand and the pendulum mass on the other hand for all or some of the relative positions of the pendulum body and the support body.

In order to prevent axial contact, an insertion member may be inserted between the rolling member and the pendulum body in an axial direction.

The insertion member is for example continuously

- only between the first rolling element and the pendulum mass, then

- between each of the rolling members and the pendulum mass, and finally

- It can only be inserted between the second rolling member and the pendulum mass.

Preferably, the insertion surface is selected to simultaneously prevent axial contact of each of the first and second rolling members on the one hand and the pendulum mass on the other hand for all relative positions of the pendulum body and the support body. do. In other words, no rolling member, whatever its position along the rolling track defined by the pendulum body, never contacts the pendulum mass in the axial direction.

The insertion surface may also be selected to prevent axial contact between the pendulum mass and the support for all or part of the relative positions of the pendulum body and the support.

In addition to preventing axial contact of the rolling member with the pendulum mass, the insertion member can prevent axial contact of this same pendulum mass with the support. No special insertion member is required to prevent contact between the support and the pendulum mass. This makes it possible to further reduce the number of required parts and, accordingly, to reduce the number of operations in installing the device.

Certain parts of the insertion surface can prevent axial contact between the pendulum mass and the support for certain relative positions of the pendulum body and the support, and then these same parts for other relative positions An axial contact between one of the rolling members and the pendulum mass can be prevented. Thus, the insert face, more precisely the parts, are reciprocal. The portion of the insertion surface for each of the rolling members and only for the support is increased. This advantageously distributes the contact load on the insertion surface and thus limits wear of the insertion member.

The insertion surface also ensures that, when looking at the device in the axial direction, at least one of the rolling elements is positioned radially and preferably also angularly along a corresponding rolling track in any position it can assume. It may be selected so as not to protrude from the insert member.

Preferably, the insertion surface, when looking at the device in the axial direction, any one of the rolling elements, whatever position it may assume, along the corresponding rolling track, also radially, preferably angularly It may also be selected so that it does not protrude from the insert member. Radial and/or angular projections of negligible portions of one of the rolling elements are contemplated.

Thus, the insertion surface is maximized to advantageously distribute the contact load.

The insertion member may have at least two different types of fixings on one of the pendulum mass and the support to which it is coupled. All of the first type of fixing parts may include legs configured to apply a load to one of the pendulum mass and the support to hold it in position in a first direction, and all of the second type of fixing parts may include legs. It may include legs configured to apply a load for maintaining the position in a second direction different from the first direction to one of the pendulum mass and the support.

Since the two types of fixtures thus apply holding forces in different directions, a good retention of the insert with respect to one of the support and the mass is ensured. The insertion member may in particular not pivot relative to one of the support and the pendulum mass.

Advantageously, the legs of the fixture only apply a load in one direction, which simplifies the shape of these fixtures.

Preferably, the second direction is orthogonal to the first direction.

More preferably, the first direction is substantially radial while the second direction is substantially orthoradial. In a variant, the first direction may be substantially tetragonal while the second direction may be substantially radial.

The above two types of fixtures may have the same shape. The fixing parts may be spaced apart from each other.

The fixing part of the first type may angularly surround the fixing part of the second type. The first type of fixation may be radially at a greater distance from the axis of rotation of the support than the second type of fixation.

The first type of fixture may be at the same radial distance from the axis of rotation of the support. The second type of fixture may be angularly and radially spaced apart from each other. In a variant, the second type of fixture may be only angularly spaced.

Preferably, the insertion member includes two respective types of anchoring portions.

Each fixture may have an axis of symmetry parallel to the axis of rotation of the support. Preferably, each fixture includes two legs opposite to its axis of symmetry. These two legs can respectively apply loads in the same direction and opposite directions to one of the support body and the pendulum body.

Regardless of the type, the anchoring portion may extend between an end arising from the insert and a free end, with each anchoring leg extending between these ends.

The legs may be connected to each other by a stiffener. This stiffener may extend over a length of 5% to 65%, particularly 10% to 50% of the length measured between the two ends of the fixture. This reinforcement may be a flange extending from the insert.

Preferably, the fixing part is engaged with force. In a variant, each anchoring leg may include a hook for preventing reversal of the insertion member on one of the support and the pendulum mass.

The fixing part may be accommodated in a window of one of the substantially elongated support body and the pendulum body. Each leg may cooperate with one of the two straight edges of the window.

These windows may be oriented along different directions, in particular the direction of a window receiving a fixture of the first type may be perpendicular to the direction of a window receiving a fixture of the second type.

The unique shape of these windows directs and facilitates the thermal expansion of the insert in the direction of these windows. This configuration allows the insertion member to expand and thus avoids an over-locking configuration that would encourage twisting of the insertion member. The window is oriented along the different directions, preferably vertically, so that thermal expansion phenomena are offset by the magnitude of the insert.

According to one embodiment of the present invention, the insertion member may be fixed to one of the pendulum masses of the pendulum body.

The insertion member may have an outer angular range greater than its inner angular range. The outer or inner angular range here corresponds to an angle measured from the axis of rotation of the support between the two angular ends of the radial outer or inner edge of the insert.

The insertion member may include two ears defining its two angular ends radially outwardly. These two ear parts can be connected angularly by means of a central section extending inside the two ear parts of the insert, so to speak in a radial direction. The ear parts 42 are symmetrical to each other with respect to a plane including the rotation axis X.

Each ear portion may be coupled to a first type of fixing portion. The central section may be coupled to at least one, preferably two, fixtures of the second type.

A radially outer edge of the insert may be provided with a notch in a central region. The insertion member may be exposed locally over a radial outer edge of the pendulum body. Preferably, the insertion member is exposed locally on the radial outer edge of the pendulum mass in two separate regions, in particular on either side of the notch.

The insertion member may be symmetrical with respect to a plane including the axis of rotation of the support. In a variant, only the ear portions may be symmetrical to each other with respect to a plane containing the axis of rotation of the support body.

The insertion member may be centered on the pendulum body. That is, the plane of symmetry of the insertion member is also the plane of symmetry of the pendulum mass.

According to a first variant, the rolling track defined by the pendulum body may be defined by a connecting member. This linking member, also called a "rolling spacer", simultaneously serves to couple the pendulum masses of the same pendulum body to each other and contribute to guiding the displacement of the pendulum body relative to the support body. The connecting member may be partially received in a window formed in the support, and the contour of this window may form a rolling track defined by the support.

Preferably, two angularly spaced connecting members may be provided to couple the first and second pendulum masses, and each of these connecting members may be disposed within its own window formed on the support. A portion of the contour of each window or a coating disposed on a portion of the contour may form a rolling track and each connecting member may define a rolling track cooperating with one rolling member.

Each connecting member may also be received within two openings of the pendulum body, namely an opening formed in the first pendulum mass and an opening formed in the second pendulum mass. The connecting member is forcefully engaged with these openings, for example. Alternatively, the connecting member may be welded or riveted to each of the first and second pendulum masses.

According to this first variant, there may be planes orthogonal to the axis of rotation simultaneously cutting the rolling track defined by the pendulum body and the rolling track defined by the support.

Still according to this first variant, each rolling member can only be subjected to a compression action between the rolling track defined by the support body and the rolling track defined by the pendulum body.

According to a second variant, the pendulum body defines, for each rolling member, two rolling tracks, namely a rolling track defined by a first pendulum mass and a rolling track defined by a second pendulum mass. Each pendulum mass has a cavity for each rolling member and a part of the contour of this cavity defines the rolling track of the pendulum body.

According to this variant, the part of the rolling element disposed between the two pendulum bodies in the axial direction can be accommodated in a window of the support body and a part of the contour of the window defines the rolling track of the support body. Each rolling member may successively include:

- a part arranged in the cavity of the first pendulum body and cooperating with a rolling track formed by a part of the edge of this cavity;

- a part arranged in the window of the support and cooperating with a rolling track formed by part of the contour of this window; and

- a part arranged in the cavity of the second pendulum body and cooperating with a rolling track formed by a part of the edge of this cavity.

According to this second variant, the pendulum body may also comprise at least one individual connecting member of the rolling members, which serves to couple the pendulum masses of the same pendulum body to each other. This linking member can be accommodated in different support cavities of the window accommodating the rolling members.

Still according to this second variant, there may not be a plane orthogonal to the axis of rotation of the support body simultaneously cutting the rolling track defined by the support body and the rolling track defined by the pendulum body.

According to the first variant disclosed above, at least one fixing part of the first type may extend radially beyond the opening of the pendulum mass to which the insertion member is coupled. Preferably, a fixing portion of the first type extends radially beyond each opening.

At least one, preferably two, anchorages of the second type may extend angularly between the openings formed in one of the pendulum masses.

The insert can be arranged radially outward with respect to the rolling track at least partially defined by the respective connecting member. An outer contour of the insert radially facing each rolling track defined by the connecting member may have substantially the same shape as that of each rolling track.

Still according to the first variant, the insertion portion of the insertion member cooperates with the axial end of one of the rolling members during all or part of the displacement of the rolling member along the length of the rolling track defined by the pendulum body. It may include a receiving part that does. Furthermore, in order to reduce or prevent the aforementioned axial impact, this insertion member cooperates with and guides the displacement of the rolling member during displacement. This cooperation of the receptacle with the axial end of the rolling member can help hold the rolling member against the rolling track defined by the pendulum body.

Said receptacle can come into contact with the axial end of the rolling element only in case of a radial fall of the rolling element, for example when the engine of the vehicle is stopped.

The receiving portion defined in the insertion member may be of a transverse shape, and in that case, the pendulum mass to which the insertion member is coupled may face the receiving portion in the axial direction and be concave. Alternatively, it may be a receptacle closed on one side.

The accommodating portion may extend radially beyond one of the openings formed in the pendulum mass to receive one of the connecting members. The receiving portion may be radially inside one of the fixing portions of the first type.

Preferably, the insertion member may comprise two receptacles, each receptacle cooperating with an axial end of the rolling member during all or part of the displacement of the rolling member along the rolling track.

Alternatively, the insertion member does not have such a receptacle.

In all of the above, each of the first and second pendulum masses may be coupled to an insertion member as defined above.

In all of the above:

- the torsional vibration damping device has a rest position in which the pendulum body is subjected to centrifugal force but not subjected to irregular rotation;

- the torsional vibration damping device has a bearing position of the pendulum body relative to the support body after displacement of the pendulum body relative to the support body in a counterclockwise direction from the rest position;

- The torsional vibration damping device has a bearing position of the pendulum body relative to the support body after displacement of the pendulum body relative to the support body in a clockwise direction from the rest position.

Each linking member may have at least one bearing damping member capable of mitigating the impact associated with contact existing between the linking member and the support for at least one of the rest and bearing positions.

The bearing damping element may be a coating or band extending along part of the contour of the connecting element, as is disclosed for example in application DE 10 2012 217 958. In a variant, the endstop member may be as disclosed in application filed in France on 14 October 2014 under number 14 59836.

Other insertion members may also be provided in the device.

In all of the above, the device may include:

- at least one first pendulum body capable of filtering first order values of torsional oscillations, and

- At least one pendulum body capable of filtering a second order value of torsional vibration different from the first order value.

In the meaning of the present application, an order value of torsional oscillation is filtered when the amplitude of this order value of torsional oscillation is reduced by the device by a value equal to or greater than 10% of the amplitude before filtering.

Since the device is configured for filtering the order, the torsional vibration frequency filtered by the first or second pendulum body varies depending on the rotational speed of the support. The use of the term "order" means that variable frequencies are processed.

In all of the above, each rolling member is a roller of circular cross-section, for example in a plane perpendicular to the axis of rotation of the support. The axial end of the roller may be free of fine annular flanges. The rollers are made of steel, for example, and can be solid or hollow.

In all of the above, the shape of the rolling track may be such that the pendulum is displaced relative to the support only by translation about an imaginary axis parallel to the axis of rotation of the support.

In a modified example, the shape of the rolling track is such that the pendulum itself is simultaneously

- by translation about an imaginary axis parallel to the axis of rotation of the support, and

- also by rotating about the center of gravity of the pendulum body (this movement is also called "coordinated movement" and is disclosed, for example, in application DE 10 2011 086 532);

It may be in the form of being displaced with respect to the support.

In all of the above, the support may be made of a single piece or may not be made of a single piece of material.

The device comprises, for example, a plurality of pendulum bodies, for example a number comprised between 2 and 8, in particular 4, 5 or 6 pendulum bodies. The pendulum body may be uniformly distributed around the axis of the support. All of these pendulum bodies can be accommodated in the same axial space.

According to another of the aspects of the invention, the invention also concerns a component for a transmission system of a motor vehicle comprising a torsional vibration damping device as defined above, said component in particular a dual damping flywheel, a hydrodynamic torque converter or a friction disk.

Accordingly, the support of the torsional vibration damping device may be one of the following:

- a plate of said part,

- the guide washer of the above parts,

- the phase adjustment washer of the above parts, or

- A support body separate from the plate, the guide washer and the phase adjustment washer.

This component can be integrated into the powertrain, for example a two-cylinder, three-cylinder or four-cylinder heat engine.

The present invention may also target an insertion member that may have an angular range of 50% to 90%, preferably 60% to 80%, and more preferably 65% to 75% of the angular range of the pendulum mass. there is.

This insertion member may be integrated into the device described above. All of the above can be found independently in combination with respect to this insert.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention may be better understood by reading the accompanying drawings and by reading the teachings of the detailed description that follows, non-limiting embodiments of the invention.
1 is a schematic partial exploded view of a torsion damping device according to the present invention;
Figure 2 shows the insertion member of Figure 1;
Figure 3 is a detailed view of Figure 2;
Figure 4 is a detailed view of the apparatus of Figure 1;
Figure 5 shows the pendulum mass of Figure 1 according to different viewpoints;
6 is a view showing a modified example of FIG. 5;
7 and 8 show two distinct positions of a second embodiment of the device according to the invention;

A damping device 1 incorporating an insert 30 according to the present invention is shown in FIG. 1 . This insertion member 30 is also referred to as a "pad". The damping device 1 of the pendulum oscillator type can in particular be mounted in a transmission system of a motor vehicle, and can be integrated, for example, into an unillustrated part of such a transmission system, which part is for example a double damping flywheel, a hydrodynamic It can be a torque converter or a friction disk.

This part may be part of a drive chain of a motor vehicle, which drive chain in particular includes a two-cylinder, three-cylinder or four-cylinder cylinder heat engine.

In Fig. 1, the device 1 is in a rest position, in which the pendulum body 3 is subjected to a centrifugal force but not to random rotation.

As is known, such a component may include a torsion damper comprising at least one input element, at least one output element, and a resilient restoring member having a circumferential action inserted between the input element and the output element. . In the meaning of this application, the terms “input” and “output” are defined with respect to the transmission direction of torque from the vehicle's internal combustion engine towards the vehicle's wheels.

In a contemplated embodiment, the device 1 comprises:

- a support (2) rotatably displaceable about an axis (X), and

- a plurality of pendulum bodies (3) movable relative to the support (2).

In the embodiment contemplated, four pendulum bodies 3 are provided evenly distributed around the rotational axis X.

The support 2 of the device 1 may consist of:

- the input element of the torsion damper,

- an output element or an intermediate phasing element placed between two series of damper springs, or

- an element that is rotationally connected to and separate from one of the above elements, for example a support suitable for the device (1).

The support 2 is in particular a guide washer or a phasing washer.

In the embodiment under consideration, the support 2 , which is made of a single piece, is generally annular in shape with two opposite sides 4 , which here are planar.

As can be seen in particular from FIG. 1 , each pendulum body 3 in the embodiment under consideration comprises:

- two pendulum masses 5 movable relative to the support 2 and axially spaced apart from each other, a first pendulum mass 5 axially arranged on the first side 4 of the support 2 and a second pendulum mass 5 disposed on the second side 4 of the support 2, and

- two connecting elements (6) connecting the first and second pendulum masses (5) to mate them.

The connecting elements 6, also called "rolling spacers", are angularly spaced in the embodiment under consideration.

Each connecting member 6 is partially accommodated in a window 9 provided in the support. In the embodiment considered, the window 9 defines an empty space inside the support 2 , which window is bounded by a closed contour 10 .

The device 1 also comprises a rolling element 11 guiding the displacement of the pendulum body 3 relative to the support 2 in the embodiment under consideration. The rolling element 11 is here a roller made of, for example, steel, at least part of which has a circular cross-section of radius R.

In the disclosed embodiment, each of the two rolling members 11 cooperates with one of the connecting members 6 of the pendulum body 3 .

Each rolling element 11 cooperates with a rolling track 12 defined on the one hand by the support body 2 and formed by a part of the contour 10 of said window 9 and, on the other hand, It cooperates with a rolling track 13 defined by itself 3 and defined by one of the connecting members 6 . More precisely, the rolling track 13 is here formed by a part of the outer edge of the connecting member 6 .

Each rolling element 11 interacts radially inside with the rolling track 13 and radially outside with the rolling track 12 when displaced relative to the support 2 and the pendulum body 3. and, for example, receives only compression between the rolling tracks 12 and 13. As shown in FIG. 1, since the rolling tracks 12 and 13 represent portions facing each other in the radial direction in the disclosed embodiment, that is, the rotation axis (X) simultaneously cutting each of the rolling tracks 12 and 13 ), there is a plane orthogonal to

In the embodiment under consideration, the device 1 comprises bearing damping elements 25 , each of the connecting elements 6 supporting one of these bearing damping elements 25 .

As shown in Fig. 1, these bearing damping members 25 may be in the form of a coating surrounding a part of the edge of the connecting member in a plane orthogonal to the axis of rotation. In a variant, these bearing damping elements 25 may be as disclosed in application filed in France on 14 October 2014 under number 14 59836.

These bearing damping members 25 can alleviate the impact associated with the bearing support of the pendulum body 3 to the support body 2 after displacement from the rest position, whatever the displacement direction. This displacement is not in the axial direction but in a plane orthogonal to the axis of rotation X. The bearing damping member 25 can also dampen the impact associated with a radial fall of the pendulum body 3 for reliable rotational speed of the internal combustion engine of the vehicle, for example when starting or stopping the vehicle.

The insert 30 of the device 1 shown in FIG. 1 is now shown in FIGS. 2 to 5 and then a second embodiment of this insert 30 is shown in FIG. 6 .

In the two embodiments contemplated, the insertion member 30 is coupled to one of the pendulum masses 5 of one of the pendulum bodies 3 and each pendulum mass 5 of this pendulum body 3 is It may be coupled to the insertion member 30 belonging thereto. According to a variant not shown, this insertion member can also be supported by a support body.

In the embodiment considered in FIGS. 2 to 5 , the insertion member 30 has a pendulum mass 5 to which it is coupled and two rolling members 11 coupled to the pendulum body 3, respectively, in the axial direction. , ie along the axis of rotation X, and is arranged to prevent contact. The insertion member 30 has:

- a continuous insert (33) arranged in the axial direction between the pendulum mass (5) and the support (2), which insert (33) is a single piece and the pendulum mass (5) and the rolling member ( 11) the inserts 33, each having an insert face 34 selected to prevent contact in the direction of the axis of rotation X, and

- two fixings of the first type (37) and fixings of the second type (38) for the pendulum mass.

The first type of fixing part 37 includes legs 39 configured to apply a load to the pendulum mass 5 to hold it in position in a first direction D ₁ , wherein the The second type of fixing parts 38 are legs which are all configured to apply a load to the pendulum mass 5 to hold it in position in a second direction D ₂ different from the first direction D ₁ . s (39).

In the contemplated embodiment, the second direction D ₂ is perpendicular to the first direction D ₁ . More precisely, the first direction D ₁ is substantially radial while the second direction is substantially tetragonal.

The two types of fixtures 37 and 38 have the same shape but are oriented along different directions, namely D ₁ and D ₂ , and the fixtures 37 and 38 are spaced apart from each other.

In the contemplated embodiment, the insert portion 33 of the insert member 30 includes two ear portions 42 defining its two angular ends, these two ear portions 42 diverging radially. The two ear portions 42 are connected by a central section 43 extending inside. The ear parts 42 are symmetrical to each other with respect to a plane including the rotation axis X.

In the radial interior, a discontinuity in the material of the insert 33 creates a transition between the ear 42 and the central region 43 .

Referring to FIG. 7 to be described later, the insertion member 30 may have an external angular range α ₁ greater than its internal angular range α ₃ . The outer or inner angular range may here correspond to an angle measured from the axis of rotation X between two angular ends of a radial outer or inner edge of the insert member 30 .

In the contemplated embodiment, each ear portion 42 is coupled to a first type of fastener 37 and the central section 43 is coupled to two second type of fasteners 38 .

The radially outer edge of the insert member 30 has a notch 44 spaced from each of the ear portions 43 .

In the embodiment contemplated, the first type of fixtures 37 are at the same radial distance from the rotational axis X and they angularly surround the second type of fixture 38 . These first type of fixing parts 37 are at a radially greater distance from the axis of rotation X than the second type of fixing part 38 and these two first type of fixing parts 38 are They are angularly spaced from each other in the radial direction.

As can also be seen in FIGS. 5 and 6 , the insertion member 30 is centered on the pendulum mass 5 to which it is coupled.

Referring to Fig. 3, the fixing parts 37 and 38 will now be described in more detail.

In the contemplated embodiment, the first type and the second type of fixtures 37, 38 shown have an axis of symmetry parallel to the axis of rotation X. The fixing part includes two legs 39 opposite to the axis of symmetry. As will be seen below, these two legs 39 respectively apply loads in opposite directions to the pendulum mass 5 .

As can be seen in FIGS. 2 and 3, regardless of their type, the fixing portions 37 and 38 each extend between an end arising from the insertion portion 33 and a free end, and each fixing leg ( 39) extends between these ends.

The legs 39 are connected to each other by stiffeners 45 extending over a length between 5% and 65%, especially between 10% and 50% of the length measured between the two ends of the fixing part 37. In the embodiment contemplated, this stiffener 45 is a flange extending from the insert 33 .

The reinforcing member 45 can impart greater resistance to the shear force applied to the insertion member 30 when the pendulum body 3 is displaced relative to the supporter 2 .

Referring to FIG. 4 , the fixing parts 37 and 38 may be engaged with the pendulum mass 5 by force.

The fixing parts 37 and 38 are received in a substantially elongated window 46 formed in the pendulum mass 5 to which the insertion member 30 is coupled.

The stiffener 45 allows the insertion member 30 to center within a window 46 formed in the pendulum mass 5 and each leg 39 has two straight edges 47 of the window 46. work with one

In the contemplated embodiment, the direction D ₃ of the window 46 accommodating the first type of fixture 37 is the direction of the window 46 accommodating the second type of fixture 38 ( D ₄ ) is perpendicular to it. Note that D ₃ is perpendicular to D ₁ and D ₄ is perpendicular to D ₂ .

The unique shape of these windows 46 directs and facilitates the thermal expansion of the insert 30 in the D ₃ and D ₄ directions of these windows 46 . This configuration allows the insert member 30 to expand, thereby avoiding an over-locked configuration that encourages twisting of the insert member 30 . Since the windows 46 are oriented along the vertical D ₃ and D ₄ directions, thermal expansion phenomena are canceled out to the extent of the insert 30 .

Referring to FIG. 5 in the contemplated embodiment, each connecting member 6 has two openings 50, namely the opening 50 formed in the first pendulum mass 5 and the second pendulum mass 5. It is observed to be accommodated within the formed opening 50 . The connecting member 6 is for example forcefully engaged with these openings 50 .

In the contemplated embodiment, a first type of fixing part 37 extends radially beyond each opening 50 and two second type fixing parts 38 angularly between said openings 50 is extended to

The insert 33 is arranged radially outward with respect to the rolling track 13 defined by the respective connecting element 6 . The outer contour of the insert 33 facing each rolling track 13 in the radial direction has substantially the same shape as that of the respective rolling track 13 .

The embodiment of the insertion member 30 shown in FIG. 6 is an axis of one of the rolling members 11 during all or part of the displacement of the rolling member 11 along the length of the rolling track 13 . It differs from the embodiment of Figs. 2-5 in that the insert 33 includes two transverse receiving portions 52 each cooperating with a directional end. The pendulum mass 5 is also concave facing the respective receiving portion 52 to receive the axial end of the rolling member 11 .

In the contemplated embodiment, the receptacle 52 extends radially beyond each opening 50 and radially inside the two first types of fixings 37 .

The insert member 30 of FIG. 6 also differs from the insert member of FIGS. 2-5 in that the fixing portions 38 of the second type are aligned along the square direction.

This insert member 30 ultimately differs from the insert member of FIGS. 2-5 in that it is exposed locally on the radial outer edge of the pendulum mass in two separate regions disposed on either side of the notch 44. do.

Finally, in FIGS. 7 and 8 a second embodiment of the device 1 along two distinct positions is shown.

In FIG. 7 , the device 1 is in a rest position, and after displacement of the pendulum body 3 relative to the support 2 in a counterclockwise direction from this rest position, the device 1 is shown in FIG. 8 . As described above, the pendulum body 3 may be in a bearing position relative to the support body 2.

In this bearing position, the rolling member 25 comes into contact with the contour of the window 9 and is inserted between the connecting member 6 of the pendulum body 3 and the support body 2, thereby mitigating the impact. .

Referring to Figures 7 and 8, the insertion member allows an axial clearance to exist between the rolling member 11 and the pendulum mass 5.

Referring to FIG. 7 , the insertion member 30 has an angular range α included in 65% to 75% of the angular range α ₂ of the pendulum mass 5, here, which is an angular range of its radial outer edge. ₁ ) has This ensures that no rolling member 11 angularly protrudes from the insertion member 30 at the bearing position.

As can be seen in FIGS. 7 and 8 , the insertion surface 34 also has no rolling element 11 except for its substantially axial end cooperating with the receptacle 52 as shown in FIG. 6 . It may also be selected so that it does not protrude from the insert 30 in a radial direction.

Thus, the insertion surface 34 prevents axial contact of the rolling element 11 and the pendulum mass 5, respectively, with respect to these two parts of the support body 2 and the pendulum body 3 shown in particular. It is advantageous to be chosen to do so.

What is observed in these figures can also be confirmed for the transitional positions between the shown bearing position and the rest position. Everything said about bearing position in a counterclockwise direction can also be applied in a clockwise direction.

As a supplement to the insertion member 30 , another insertion member may be provided in the device 1 .

The present invention is not limited to the disclosed embodiments.

Claims (12)

In the torsion vibration damping device 1,
a support (2) capable of being displaced by rotation about an axis (X);
First and second pendulum masses 5 movable with respect to the support 2 and spaced apart from each other in the axial direction, and at least one connecting the first and second pendulum masses 5 to mate these masses. At least one pendulum body (3) comprising a connecting member (6), wherein the first pendulum mass (5) is axially disposed on the first side (4) of the support body (2) and the second pendulum mass (5) is disposed on the second side (4) of the support (2) in the axial direction, said at least one pendulum body (3);
At least one first and second rolling member (11) coupled to the pendulum body, each of which is on the one hand a rolling track (which is defined on the support body (2)) 12) and on the other hand cooperating with a rolling track (13) defined by the pendulum body (3) to guide the displacement of the pendulum body (3) relative to the support body (2). first and second rolling members 11, and
An insertion member (30) having an insertion portion (33) disposed axially between one of the pendulum masses (5) and at least two rolling members (11), wherein the insertion portion is a single piece and the pendulum mass ( 5) with an insertion face (34) selected to prevent axial contact of each rolling element (11) with said insertion member (30).
Torsion vibration damping device. According to claim 1,
The insertion surface is only,
axial contact of the first rolling member (11) and the pendulum mass (5) with respect to a specific relative position of the pendulum body (3) and the support body (2);
characterized in that it is selected to prevent axial contact of the pendulum mass (5) with the second rolling member (11) relative to the other relative positions of the pendulum body (3) and the support body (2).
Torsion vibration damping device. According to claim 1 or 2,
The insertion surface 34 is, for all or part of the relative position of the pendulum body 3 and the support body 2, on the one hand, each of the first and second rolling members 11, and on the other hand, the Characterized in that it is selected to simultaneously prevent contact in the axial direction (X) of the pendulum mass (5)
Torsion vibration damping device. According to claim 1 or 2,
The insertion surface 34 provides an axial direction (X) contact between the pendulum mass 5 and the support 2 for all or part of the relative positions of the pendulum body 3 and the support 2. characterized in that selected to prevent
Torsion vibration damping device. According to claim 1 or 2,
characterized in that, when viewing the device in the axial direction, at least one of the rolling members (11) does not protrude from the insertion member (30) in the radial direction.
Torsion vibration damping device. According to claim 1 or 2,
The insertion member includes at least two different types of fixing parts 37, 38 on either the support body 2 or the pendulum masses 5, and the first type fixing parts 37 are all and legs (39) configured to apply a load to one of the support body (2) and the pendulum mass (5) to keep it in position in a first direction (D ₁ ), The top 38 is both configured to apply a load to one of the support 2 and the pendulum mass 5 to hold it in position in a second direction D ₂ different from the first direction D ₁ . Characterized in that it comprises legs (39) to be
Torsion vibration damping device. According to claim 6,
The second load direction (D ₂ ) is characterized in that orthogonal to the first load direction (D ₁ )
Torsion vibration damping device. According to claim 6,
The first type of fixing part (37) and the second type of fixing part (38) are accommodated in one window (46) of the elongated support (2) and the pendulum mass (5). doing
Torsion vibration damping device. According to claim 6,
Characterized in that the insertion member 30 is fixed to the associated pendulum mass 5
Torsion vibration damping device. According to claim 9,
Each of the rolling tracks 13 defined by the pendulum body 3 is integral with a connecting member 6, and each connecting member 6 is coupled to an opening 50 formed in the pendulum mass 5, A fixing part 37 of a first type extends radially beyond each of said openings 50 and at least one fixing part 38 of a second type exists angularly between said openings 50. characterized by
Torsion vibration damping device. According to claim 10,
The insert 33 comprises at least two receptacles 52, each receptacle 52 comprising the rolling element along the length of the rolling track 13 defined by the pendulum body 3. characterized in that it cooperates with the axial end of the rolling element (11) during all or part of the displacement of
Torsion vibration damping device. In the parts for the transmission system of the vehicle,
comprising the damping device (1) according to claim 1 or 2;
Components for automotive transmission systems.

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