EP3685071A1 - Dispositif d'amortissement de torsion a amortisseur principal et amortisseur additionnel - Google Patents
Dispositif d'amortissement de torsion a amortisseur principal et amortisseur additionnelInfo
- Publication number
- EP3685071A1 EP3685071A1 EP18801012.8A EP18801012A EP3685071A1 EP 3685071 A1 EP3685071 A1 EP 3685071A1 EP 18801012 A EP18801012 A EP 18801012A EP 3685071 A1 EP3685071 A1 EP 3685071A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotating element
- springs
- additional
- main
- threshold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/121—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon using springs as elastic members, e.g. metallic springs
- F16F15/123—Wound springs
- F16F15/12353—Combinations of dampers, e.g. with multiple plates, multiple spring sets, i.e. complex configurations
- F16F15/1236—Combinations of dampers, e.g. with multiple plates, multiple spring sets, i.e. complex configurations resulting in a staged spring characteristic, e.g. with multiple intermediate plates
- F16F15/12366—Combinations of dampers, e.g. with multiple plates, multiple spring sets, i.e. complex configurations resulting in a staged spring characteristic, e.g. with multiple intermediate plates acting on multiple sets of springs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
- F16D3/12—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted for accumulation of energy to absorb shocks or vibration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/121—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon using springs as elastic members, e.g. metallic springs
- F16F15/123—Wound springs
- F16F15/12353—Combinations of dampers, e.g. with multiple plates, multiple spring sets, i.e. complex configurations
- F16F15/1236—Combinations of dampers, e.g. with multiple plates, multiple spring sets, i.e. complex configurations resulting in a staged spring characteristic, e.g. with multiple intermediate plates
- F16F15/12366—Combinations of dampers, e.g. with multiple plates, multiple spring sets, i.e. complex configurations resulting in a staged spring characteristic, e.g. with multiple intermediate plates acting on multiple sets of springs
- F16F15/12373—Combinations of dampers, e.g. with multiple plates, multiple spring sets, i.e. complex configurations resulting in a staged spring characteristic, e.g. with multiple intermediate plates acting on multiple sets of springs the sets of springs being arranged at substantially the same radius
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/129—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon characterised by friction-damping means
- F16F15/1297—Overload protection, i.e. means for limiting torque
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2232/00—Nature of movement
- F16F2232/02—Rotary
Definitions
- the invention relates to the field of torque transmission in motorized devices and relates to a torsion damping device for a vehicle transmission chain.
- Motorized vehicles generally include such torsion damping devices that can be integrated in various elements of the transmission chain.
- a dual flywheel flywheel, a clutch disk, or a torque limiter may include a torsion damping device for filtering engine acyclisms and other torsional oscillations.
- This filtering is typically carried out by one or more torsion dampers which are spring-damping assemblies working in torsion and, during the transmission of torque, a relative rotational movement of a first rotating element for transmitting a torque. , coupled upstream of the transmission chain, and a second rotational torque transmission element, coupled downstream of the transmission chain.
- the relative rotation may be permitted by springs and the damping may be achieved by a friction device provided with friction washers loaded axially by spring washers, so as to dissipate by friction a part of the energy accumulated in them. springs.
- the torque opposing a relative rotation of the two rotating elements is a function of the angle of this relative rotation according to a characteristic curve of each torsion damping device.
- the invention aims to improve the torsion damping devices of the prior art by providing such a device whose characteristic curve is flexible.
- the invention provides a torsion damping device for a vehicle transmission chain, comprising: a first rotating element for transmitting a torque;
- a main damper comprising at least one main spring interposed between the first rotating element and the second rotating element, and allowing, when deformed, a relative rotation about an axis of rotation between the first and second rotating elements.
- the torsion damping device further comprises:
- a third rotational element for transmitting the rotatably mounted torque with respect to the first and second elements rotating about said axis of rotation; an additional damper comprising at least one additional spring mounted both in the first rotating element and in the third rotating element; the second and third rotating elements respectively comprising a first abutment and a second complementary abutment, arranged so that: when the angular deflection between the first and second rotating elements is greater than zero and less than a first angular deflection threshold between the first and second rotating elements, second rotating elements from a relative angular position of rest of the first and second rotating elements for which no torque is transmitted, said at least one main spring is compressed while the third rotating element is coupled in rotation with the first rotating element via the additional spring uncompressed; and when the angular displacement between the first and second rotating elements is greater than said first threshold, the first abutment and the second complementary abutment bear against each other, the or at least one main spring being compressed and the at least one additional spring being compressed in parallel between the first rotating element and the third
- the additional spring allows the first element to drive the third element in rotation relative to the second element, without deformation of the spring; and when the angular displacement between the first and second rotating elements, from a relative angular position of rest of the first and second rotating elements for which no torque is transmitted, is greater than zero and greater than a first threshold, the first stop and the second complementary stop are in abutment against each other and the at least one additional spring deforms in parallel with the main spring between firstly the first rotating element and secondly the second rotating element via the third element turning.
- the prestressing of a spring designates the fact that this spring is mounted in one or more housings which are smaller than the initial length of the spring, the latter thus exerting, by its elasticity, a force against the walls of the housings;
- the compression of a spring means that the spring is compressed by bringing two moving parts together.
- the prestressing of a spring is therefore effective even when the torsion damping device is at rest, without any torque being transmitted.
- the compression of a spring it only takes place during transmission torque, movable parts relative to each other, change the configuration of the housing of the springs and compress it.
- a torsion damping device has, for a relative rotation of the first and second rotating elements from an angular rest position dampers for which no torque is transmitted to a position of end of stroke shock absorbers , two phases of operation:
- the main damper being arranged to be deformed at the during this first phase while the third rotating element is adapted to be rotated by the first rotating element, without deformation of the additional spring, through the additional spring;
- Such a device advantageously replaces a limit stop between the first and second rotating elements while avoiding any mechanical shock and associated vibrations.
- This second phase of operation is particularly advantageous in the case of a main damper with large clearance, for example more than 30 degrees of angular stroke damping.
- the torsion damping device may comprise the following additional features, alone or in combination: the first rotating element comprises at least one additional housing and in that the third rotary element comprises at least one second additional housing, the at least one a first and second additional housing being arranged axially vis-à-vis so that the at least one additional spring is inserted in these housing vis-à-vis; -
- the first rotating element comprises at least one radially extending arm and arranged circumferentially between two main springs, one of said first additional housing being formed on the arm;
- the first rotating element comprises at least one arm extending radially, a main spring being in circumferential bearing directly or indirectly against this arm, a second additional housing being formed on this arm;
- the at least one main spring and the at least one additional spring are arranged so that at least a portion of the additional spring is located radially in the same plane perpendicular to said axis as a portion of the main spring.
- the additional additional spring as a whole is radially in the same plane perpendicular to said axis as a portion of the main spring;
- the at least one main spring comprises an outer radial edge and an inner radial edge and the at least one additional spring is arranged at least partly in a torus centered on said axis and delimited radially by the inner and outer radial edges of the at least one a main spring;
- the main damper comprises at least two main springs and an additional spring is arranged circumferentially between two main springs;
- the main damper comprises at least two groups of main springs, the main springs being arranged in series in each group, and an additional spring is arranged circumferentially between two groups of main springs;
- the main springs are arranged in series in each group via a phasing element, connecting in each group two consecutive main springs arranged in series;
- the main springs of the main damper are distributed in a first stage of springs and a second stage of springs, the first stage of springs and the second stage of springs being arranged in series via a phasing element, the torsion damping device being arranged so that when the angular displacement between the first rotating element and the second rotating element reaches a third angular displacement threshold between the first rotating element and the second element rotating from a relative angular position of rest taken by the second rotating element and the first element when no torque is transmitted, the second stage of springs ceases to compress.
- the angular stiffness of the damper can be increased.
- the stiffness of the main damper doubles when the angular displacement between the first rotating element and the second rotating element increases beyond the third threshold. This can in particular reduce the size of the additional spring or reduce the quality of its wire.
- the torsion damping device is arranged so that the second stage of springs ceases to compress when the angular displacement between the first rotating element and the second rotating element increases beyond the third threshold.
- the torsion damping device is arranged so that the second stage of springs ceases to compress for any angular displacement between the first rotating element and the second rotating element greater than the third threshold.
- the torsion damping device is arranged so that the first stage of springs continues to compress when the angular displacement between the first rotating element and the second rotating element exceeds the third threshold.
- the third threshold of angular displacement between the first rotating element and the second rotating element is less than or equal to the first angular displacement threshold between the first and second rotating elements.
- the third angular displacement threshold between the first rotating element and the second rotating element is less than or greater than the first angular displacement threshold between the first and second rotating elements.
- the angle separating the first angular deflection threshold (A1) and the third angular displacement threshold (A3) is advantageously less than 10 degrees, preferably less than 5 degrees. This makes it possible to generate a connection slope and to create a transition between the angular stiffness of the start of the stroke and the angular end-of-stroke stiffness.
- the third threshold of angular displacement between the first rotating element and the second rotating element is less than or equal to the first angular displacement threshold between the first and second rotating elements.
- the second stage of springs comprises coil springs and the second stage of the main damper is arranged so that the springs of the second stage reach their compression limit, in particular with their contiguous turns, when the angular displacement between the first element rotating and the second rotating element reaches the third threshold.
- the second rotating element and the phasing element respectively comprise a third abutment and a fourth abutment, arranged so that: when the angular displacement between the first rotating element and the second rotating element reaches a third threshold of angular displacement between the first and second abutments, rotating element and the second element rotating from a relative angular rest position taken by the second rotating element and the first element when no torque is transmitted, the third stop and the fourth stop are in abutment against each other and the second stage of springs ceases to compress when the angular clearance between the first rotating element and the second rotating element increases beyond the third threshold.
- the third stop is formed by a tab integral in rotation with the second rotating element. This tab can extend axially.
- the fourth stop is formed by a tab integral in rotation with the phasing element. This tab can extend radially.
- the angular stiffness of the first stage of springs is different from the stiffness of the second stage of springs.
- said first threshold is between 15 and 65 degrees, preferably between 25 and 50 degrees;
- the device comprises an angular limit stop limiting the relative angular displacement between the first and second rotating elements, and in that the angle separating said first threshold from the angular end position is between 3 and 15 degrees. preferably between 3 and 10 degrees;
- the ratio of the stiffness of the additional damper to the stiffness of the main damper is between 2 and 10, preferably between 3 and 8, for example 4 or 5.
- the angular stiffness of the main damper is of about 3 Nm / ° and the angular stiffness of the additional damper is between 10 Nm / ° and 15 Nm / °, for example between 12 Nm / ° and 15 Nm / °, for example 14 Nm / °.
- one of the first rotating element and the second rotating element is rotatably coupled to a friction disc and the other one of the first rotating element and the second rotating element is rotatably coupled with a hub;
- the third rotating element comprises two additional guide washers arranged on either side of the first rotating element and maintaining the additional springs axially
- the second rotating element comprises two main guide washers holding the main springs axially, each guide washer; additional being arranged axially between the first rotating member and a main guide washer;
- said second stop is formed by at least one radial tongue disposed on each additional guide washer
- said first and second complementary abutments are arranged radially outside the main springs.
- Another object of the invention is a torsion damping device for a vehicle transmission chain, comprising:
- a first rotary torque transmission element provided with a first housing
- a second torque transmission rotating element provided with a second housing
- an elastic device interposed between the first rotating element and the second rotating element, and allowing, when deformed, relative rotation about an axis of rotation between the first and second rotating elements, the elastic device comprising at least one spring which is mounted in both the first housing and the second housing;
- a friction device comprising:
- An elastic washer arranged between the axial support and the friction washer so as to exert an axial force on the friction washer in the direction of the second rotating element;
- An actuating washer comprising an actuating lug arranged circumferentially between a first end of said spring and the first rotating element so as to allow relative rotation between the actuating washer and the second rotating element when the first end of the spring is moved by the first rotating member, via the actuating tab, towards a second end of the spring opposite the first end;
- the actuating washer being able to drive the friction washer in rotation so that, when the actuating washer (32) and the second rotating element (10) rotate relative to one another, the washer friction rubs directly or indirectly against the second rotating element.
- the torsion damping device may have the following additional characteristics, alone or in combination:
- the actuating washer comprises at least one axial finger cooperating with a notch of the friction washer, to ensure the drive of the friction washer by the actuating washer;
- the actuating washer comprises at least one axial finger coupled with a notch of the friction washer
- a circumferential clearance is present between the axial finger and the circumferential ends of the notch of the friction washer.
- the circumferential clearance can be from 3 to 5 degrees; the actuating washer comprises an annular portion connecting the actuating tab and the axial finger, and the second rotating element comprises an annular friction surface against which the friction washer is pressed, the annular portion of the actuating washer; on the one hand, and the spring washer, the axial support, and the friction washer on the other hand being disposed on either side of the annular friction surface of the second rotating element;
- the annular portion of the actuating washer is mounted between the first rotating element and the annular friction surface with an axial clearance allowing rotation of the actuating washer with respect to the first rotating element;
- the friction device is arranged so that the washer presses the friction washer against the second rotating element without pressing the annular portion of the actuating washer against the first rotating element. This allows a relative rotational movement between the first rotating element and the activation washer, so that the friction washer is not driven by the first rotating element when the second end of the spring is compressed by the first rotating element. direction of the first end of the spring.
- the friction generated by the friction washer is obtained only for a torque transmission direction, for example from the gearbox input shaft towards the engine;
- the annular portion of the actuating washer can be mounted between the first rotating element and a third rotating torque transmission element, rotatable about the axis, also with an axial clearance allowing the rotation of the washer of actuation relative to the first rotating element;
- the second rotating element comprises a groove through which the axial finger passes through the second rotating element
- the axial support is formed of a collar integral with the second rotating element, the spring washer and the friction washer being disposed between this collar and the annular friction surface of the second rotating element;
- the friction device comprises an intermediate washer interposed between the spring washer and the friction washer;
- the annular portion of the actuating washer is arranged axially between the first rotating element and the second rotating element;
- the elastic device comprises at least two groups of springs, the springs being arranged in series in each group by means of a phasing element, connecting the ends of the springs within a group of springs;
- one of the first rotating element and the second rotating element is rotatably coupled with a torque input element and the other of these elements is coupled in rotation with a torque output element.
- the actuating washer further comprises an angular stop and the second rotating member comprises a complementary abutment, the angular abutment and the complementary abutment being arranged so that the actuating washer is rotatably coupled to the second rotating element when the second rotating member compresses the first end of the spring towards the second end of the spring opposite the first end.
- the friction generated by the friction washer is obtained only for a direction of torque transmission, for example from the gearbox input shaft towards the engine, the stop preventing the activation washer to rotate relative to the second element rotating in the other direction of torque transmission, for example from the engine to the gearbox input shaft;
- an axial finger coupling the actuation and friction washers forms said angular stop and the groove forms said complementary abutment;
- the angular stop is arranged on the actuating tab of the actuating washer and the complementary abutment is arranged on the second housing of the second rotating element so that the actuating tab is inserted circumferentially between the first end of the spring and a bearing surface of the second housing; in an angular position of rest taken by the device when no torque is transmitted, the at least one spring is mounted in said first and second housings so that its ends are simultaneously supported against a first zone supporting the first housing and secondly a second support zone of the second housing;
- the elastic device comprises at least two springs, the spring cooperating with the actuating tab of the actuating washer being an offset action spring, a circumferential clearance being left between the actuating tab and the first end of the spring in the angular position of rest of the damping device.
- the friction can be obtained with a "delay effect”.
- the elastic device comprises four springs and the actuating washers comprises two actuating tabs and two spring each cooperate with an actuating tab of the actuating washer, these two springs being a spring to shifted action, a circumferential clearance being left between each actuating tab and the first end of each spring acting offset in the angular position of rest of the damping device.
- the invention also relates to a vehicle transmission chain comprising a friction disk coupled to one of the first rotating element and the second rotating element and a hub coupled in rotation with the other one of the first rotating element and the second rotating element.
- the transmission chain comprises a wheel adapted to be mounted on a crankshaft, and a torque transmission mechanism, such as a torque limiter or a clutch mechanism arranged to transmit a torque between the steering wheel. and the friction disc.
- a torque transmission mechanism such as a torque limiter or a clutch mechanism arranged to transmit a torque between the steering wheel. and the friction disc.
- FIG. 1 is an exploded view of a torsion damping device according to the invention
- FIG. 2 is a front view of the device of FIG. 1
- - Figure 3 is a view according to section AA of Figure 2;
- FIG. 4 is a view similar to FIG. 2, showing the interior of the device
- FIG. 5 is a block diagram illustrating the operation of the torsion damping device according to the invention.
- FIG. 6 is a characteristic curve corresponding to the diagram of FIG. 5;
- FIG. 7 is a front view of the torsion damping device of FIG. 1 illustrating the first phase of operation of the damping device;
- - Figure 8 is a front view of the torsion damping device of Figure 1 illustrating the second phase of operation of the damping device;
- FIG. 9 shows the torsion damping device of Figures 1 and 2 mounted in a torque limiter of a vehicle.
- - Figure 10 schematically shows a second embodiment of the invention.
- FIG. 1 represents a torsion damping device, coupled to a friction disk 2 of a torque limiter (not shown in FIG. 1) intended, in normal operation, to transmit torque while rotating about an axis X and to limit this transmission when this couple exceeds a certain value.
- a torque limiter not shown in FIG. 1
- the X axis of rotation determines the "axial” orientation.
- the "radial” orientation is directed orthogonally to the X axis.
- the “circumferential” orientation is directed orthogonally to the X axis of rotation and orthogonal to the radial direction.
- the terms “external” and “internal” are used to define the relative position of one component relative to another, with reference to the axis X of rotation, a component close to said axis is thus described as internal as opposed to an external component located radially at the periphery.
- the angles and angular sectors expressed are defined in relation to the axis of rotation X.
- the damping device 1 comprises:
- a peripheral torque transmission member here constituted by a friction disc 2 on either side of which are fixed two friction linings 3 by a first set of rivets 4;
- a central torque transmission member here constituted by a hub 5.
- the friction disk 2 is fixed by a second set of rivets 6 to a first rotating torque transmission member which is constituted by a disc called “sail” 7.
- the hub 5 is fixed by a third set of rivets 8 to a second rotary torque transmission member which is constituted by a pair of discs called "guide washers” 9, 10.
- a first guide ring 9 is fixed against a side of the hub 5 while a second guide ring 9 is fixed against an opposite side of the hub 5.
- the guide washers 9, 10 each comprise four angular stops 39 disposed on the periphery of the washer in two perpendicular diameters, the four angular stops 39 of each guide ring 9, 10 being disposed in with respect to the four angular stops 39 of the other guide ring 9, 10.
- damping device comprises a torsion damping device interposed between the web 7 and the guide washers 9, 10 so that the web 7 on the one hand, and the guide washers 9, 10 on the other hand, can rotate relative to each other by squeezing the damping device.
- the damping device 1 is intended to be mounted in a torque transmission chain, for example between an engine and the wheels of a vehicle, so that the friction disk 2 and its linings 3 are pressed by means of a pressure disc loaded elastically, against a support disk mounted integral with a flywheel; and so that the hub 5 is connected to a transmission shaft.
- the motor element rotates the friction linings 3 and thus the web 7 which is integral therewith.
- the web 7 compresses the damping device which transmits the torque to the guide washers 9, 10 and thus to the hub 5 which is integral therewith.
- the damping device By transmitting the torque between the web 7 and the guide washers 9, 10, the damping device, by its elastic and frictional properties, filters the passage acyclisms and other undesirable twisting movements.
- the damping device further comprises a first limit stop and a second complementary end stop allowing the torque to be transmitted directly from the friction linings 3 to the hub 5, bypassing the torsion damping device. beyond a predetermined angle of relative rotation between the web 7 and the guide washers 9, 10.
- the first limit stop consists here of external teeth 11 arranged around the periphery of the hub 5 and the second complementary end stop is constituted by internal teeth 12 at the center of the web 7.
- the torsion damping device comprises a main damper and an additional damper.
- the main damper comprises: four springs 13 arranged circumferentially;
- a phasing element of the springs 13 comprising two spacers 15 mounted diametrically opposite between two phasing discs 16.
- the web 7 and the guide washers 9, 10 each comprise openings for mounting the springs 13 defining two housings, each for a pair of springs 13.
- the housings of the veil 7 each have a first bearing zone 19 and a second opposite bearing zone 20.
- the housings of each guide ring 9, 10 each have a first bearing zone 21 and a second bearing zone 20 opposite.
- the damping device further comprises a third rotational torque transmission element which is, in the present example, constituted by two identical additional guide washers 23 mounted on either side of the web 7 and secured by two spacers 24.
- the additional damper comprises two additional springs 25 each arranged in an additional housing of the web 7.
- the web 7 has for this purpose two arms 43 diametrically opposed and each carrying one of these housings.
- the main springs 13 are mounted between the arms 43.
- the additional guide washers 23 also comprise housings for mounting the additional springs 25.
- the additional housings of the veil 7 each comprise a first zone.
- additional support 26 and a second additional support zone 27 each comprise a first additional support zone 37 and a second additional support zone 38.
- the damping device 1 also comprises a friction device for dissipating the energy of the springs and to avoid oscillation phenomena.
- the friction device comprises an axial support 28 fixed against the second guide ring 10 by the third set of rivets 8. Between the axial support 28 and the second guide ring 10 are arranged: a friction washer 29; an intermediate washer 30; and an elastic washer 31, the latter applying a load on the friction washer 29 via the intermediate washer 30.
- an actuating washer 32 is provided on the other side of the second guide washer 10 and has two actuating tabs 33 and four axial fingers 34.
- the actuating washer 32 is mounted so that the four axial fingers 34 pass through four corresponding grooves 35 formed in the second guide ring 10.
- the four axial fingers 34 are each inserted into a notch 36 of the friction washer 29.
- the actuating washer 32 is thus coupled in rotation to the friction washer 29.
- the actuating washer 32 is also mounted against the veil 7 so that the actuating tabs 33 each bear one of the first bearing zones 19 of the veil 7.
- the mounting of the main springs 13 is shown in the front view of FIG. 2.
- the right diameter of the disc 1 comprises a first pair of main springs 13 connected in series, and the right diameter of the figure comprises a second pair of main springs. 13 mounted in series.
- This Figure 2 shows the disk 1 in the state of rest, that is to say when it transmits no torque, its springs are not solicited.
- Each spring 13 is mounted, at one of its ends, in a nozzle 14 and, at the other of its ends, against a spacer 15.
- Each nozzle 14 is supported astride the web 7 and the two guide rings 9 , 10, and is therefore resting on three support zones: a support zone of the web 7 and a bearing zone of each guide washer 9, 10.
- each pair of spring 13 is mounted between two end-pieces 14, one of which simultaneously bears on the first support zone 19 of the web 7 and on the first support zone 21 of each guide washer 9, 10, and the other end-piece 14 simultaneously rests on the second bearing zone 20 of the web 7 and the second bearing zone 22 of each guide washer 9, 10.
- the springs 13 are thus, in pairs, prestressed between the first bearing zones 19, 21 and the second bearing zones 20, 22.
- the insert 15 rotatable about the X axis by disks Phasing, the series of springs 13 of a pair, as well as the phasing, ie the angular coordination of a pair with the other.
- the sectional view of FIG. 3 shows the stack of parts within the damping device 1.
- the two additional guide washers 23 are disposed on either side of the web 7, the actuating washer 32 being disposed between the web 7 and one of these additional guide washers 23.
- the phasing discs 16 are arranged on both sides of the two additional guide washers 23, while the two guide washers 9, 10 are arranged on either side of the assembly. Only the friction device is located axially outside the guide rings 9, 10, thanks to the axial support 28.
- FIG. 4 shows the disk 1 of FIG. 2 without the first guide ring 9, showing the arrangement of the springs 13, 25, of the web 7, and of the additional damper 25.
- the additional springs 25 are mounted similarly to the main springs 13, straddling the web 7 and the additional guide washers 23.
- Each additional spring 25 is thus prestressed between, on one side, a simultaneous support on the first zone d additional support 26 of the web 7 and on the first two additional support zones 37 of the two additional guide washers 23, and, on the other side, a simultaneous support on the second additional support zone 27 of the web 7 and on the second two additional support zones 38 of the two additional guide washers 23.
- the dimension, in the radial direction, of the housing of the additional guide washers 23 is slightly less than that of the additional housings of the web 7 so that an additional spring 25 is mounted astride the web 7 and is contained in on both sides of the web 7 by the additional guide washers 23.
- the additional guide washers 23 have on their radial ends tongues 40 on which the spacers 24 are fixed.
- the friction disk 2 comprises two diametrically opposed notches 41 and the web 7 has two diametrically opposite notches 42, the notches 41, 42 being opposite one another.
- These indentations 41, 42 allow a relative rotation of the additional guide washers 23 and the web 7, the angular travel allowed by the additional springs 25.
- FIG. 5 is a block diagram in which the left part of the figure represents the web 7 and the right part represents the guide washers 9, 10. The figure shows the following elements:
- FIG. 5 can thus be compressed between a rest position which is that represented in the figure, in which the springs are not stressed, and an end-of-stroke position, at the end of a stroke A2, in which the stops 11 and 12 are in contact.
- the damping device works in a first mode operating mode where the springs 13 are compressed and therefore where only the main damper works.
- the stops 39 and 40 come into mutual contact and the springs 25 then begin to be compressed, in parallel with the springs 13. This is then a second phase of operation which continues until at the end of the race A2. Beyond the stroke A2, the dampers remain compressed but the torque can be transmitted directly between the sail 7 and the guide washers 9, 10.
- Figure 6 illustrates the evolution of the return torque (ordinate) exerted by the torsion damping device according to the relative rotation angle (abscissa) between the web 7 and the guide washers 9, 10.
- the curve has two slopes corresponding to the two operating modes described above.
- FIG. 7 indeed illustrates the disc 1 with a relative angular travel between the web 7 and the guide washers 9, 10 which corresponds to the angular stroke A1.
- FIG. 7 illustrates the disk 1 in the position it adopts when a pair C1 is applied between the web 7 and the guide washers 9, 10.
- FIG. 8 illustrates the disk 1 with a relative angular travel between the web 7 and the guide washers 9, 10 which corresponds to the angular stroke A2.
- FIG. 8 illustrates the disk 1 in the position it adopts when a torque greater than or equal to the torque C2 is applied between the web 7 and the guide washers 9, 10.
- the disc 1 thus takes the configuration of Figure 7.
- Figure 7 corresponds to the end of the first phase of operation.
- the first bearing zones 21 of the guide washers 9, 10 are each offset angularly with respect to the first bearing zone 19 corresponding of the veil 7, an angle equal to the angular stroke A1.
- the second bearing zones 22 of the guide washers 9, 10 are each angularly offset relative to the corresponding first support zone 20 of the web 7, of the same angle.
- the springs are compressed between the first bearing zones 20 of the web 7 and the first bearing zones 21 of the guide washers 9, 10, which have moved closer together.
- the web 7 has been rotated, and thus the additional springs 25, inserted in the housing of the web 7, also.
- These additional springs 25 have in turn driven the additional guide washers 23 in rotation, without additional compression of these springs 25, since nothing prevents this relative rotation of the additional guide washers 23 with respect to the guide washers 9, 10, on the angular deflection A1.
- the relative position of the web 7, additional guide washers 23 and additional springs 25 is therefore the same as that of the rest position.
- each tongue 40 of the additional guide washers 23 comes into contact with an angular abutment 39 of the guide washers 9, 10.
- Figure 8 corresponds to the end of the second phase of operation. If, from the position of Figure 7, the relative rotation of the web 7 relative to the guide washers 9, 10 continues to reach the angular stroke A2, the torsion damping device then enters its second phase of operation.
- each tongue 40 of the additional guide washers 23 has come into contact with an angular abutment 39 of the guide washers 9, 10.
- the simultaneous rotation drive of the veil and the washers additional guidance in the same direction is no longer possible.
- the additional springs 25 are compressed between the second additional support zone 27 of the web 7 and the first support zone additional 37 of the additional guide washer 23 which thus approach each other.
- the damper The main operator works together with the additional buffer (in parallel), according to the second phase of operation.
- the springs 13, 25 have not been shown to reveal the bearing areas.
- FIGS. 7 and 8 relate to a relative direction of rotation of the web 7 and the guide washers 9, 10. In the other direction of relative rotation from the rest position, the compression of the springs in two phases takes place in the same way.
- the torsion damping device described has a large deflection travel.
- the value of the angular stroke A1 is 42 ° and the value of the angular stroke A2 is 47 °.
- Figure 9 shows the torsion damping device 1 mounted in a torque limiter 50 of a vehicle.
- This torque limiter 50 comprises two jaws 51 between which the friction linings 3 are mounted.
- An elastic washer 52 loads an intermediate washer 53 against the friction linings 3.
- the torsion damping device 1 is thus clamped between the intermediate washer 53 and a jaw 51 so that it can be rotated with the torque limiter 50.
- the torque limiter 50 is mounted on a flywheel 54 of the engine of a vehicle and the hub 5 is mounted on a transmission shaft (not shown) of this vehicle.
- the load of the spring washer 52 is calibrated so that, when the torque transmitted by the flywheel 54 to the drive shaft, or the drive shaft to the motor 54, exceeds a predetermined limit, the friction linings can sliding relative to the torque limiter 50.
- the torsion damping device 1 filters in all cases the oscillations of torsions taking place between the flywheel 54 and the drive shaft.
- the main springs of the main damper are distributed in a first stage E1 of springs and a second stage E2 of springs, the first stage of springs E1 and the second stage E2 of springs being arranged in series via a phasing element 13, and the torsion damping device is arranged such that when the angular displacement between the first rotating element 7 and the second rotating element 9,10 reaches a third threshold A3, A3 'of angular displacement between the first rotating element 7 and the second rotating element 9, 10 from a relative angular position of rest taken by the second rotating element 9, 10 and the first element when no torque is transmitted, the second stage of springs E2 ceases to compress.
- the schematic diagram of this embodiment is shown in FIG. 10.
- the second stage of springs E2 ceases to compress for any angular displacement between the first rotating element 7 and the second rotating element 9, 10 greater than the third threshold A3, the angular stiffness of the main damper increases beyond the third threshold A3.
- the second stage of springs ceases to compress when the angular displacement between the phasing element 13 and the second rotating element 9, 10 reaches a fourth angular displacement threshold A4 between the phasing element and the second element rotating for a second time. relative angular position of rest taken by the phasing element and the second rotating element when no torque is transmitted.
- the torsion damping device is arranged so that the first stage of springs E1 continues its compression when the angular displacement between the first rotating element 7 and the second rotating element 9, 10 exceeds the third threshold A3.
- the third threshold A3 and A3 'of angular displacement between the first rotating element 7 and the second rotating element 9, 10 is less than or equal to the first threshold A1 of angular displacement between the first 7 and second rotating elements 9, 10.
- the angular stiffness of the damper is increased throughout the range of angular deflection for which a greater stiffness is desired, that is to say the angular range of travel for which the additional spring 25 is compressed.
- the damping characteristic curve of two cases of figures are represented.
- the third threshold A3 of angular displacement between the first rotating element 7 and the second rotating element 9, 10 is smaller than the first threshold A1 of angular displacement between the first 7 and second rotating elements 9,10.
- the angle separating the first angular displacement threshold (A1) and the third angular displacement threshold A3 is less than 10 degrees, preferably less than 5 degrees.
- the first and third thresholds A1 and A3 are such that the third threshold A3 is smaller than the first threshold A1.
- the damping characteristic curve presents in the direction of direct transmission three successive slopes of respective stiffness K1, K2 and K3; K1 being the stiffness obtained for an angular deflection lower than the third threshold A3, K2 being the stiffness obtained for an angular deflection greater than the third threshold A3 and lower than the first threshold A1, and K3 being the stiffness obtained for an angular deflection greater than the first threshold A1.
- the ratio between two successive slopes is less than 3.
- the third threshold A3 'of angular displacement between the first rotating element 7 and the second rotating element 9, 10 is substantially equal to the first threshold (A1) of angular displacement between the first 7 and second rotating elements 9,10 .
- the stiffness of the spring 25 is smaller than the stiffness of the spring 25 of the case 2, which is why the slopes of the curves at the end of the deflection are different.
- the springs of the second stage E2 reach their compression limit, in particular with their contiguous turns, when the angular displacement between the first rotating element 7 and the second rotating element 9, 10 reaches the third threshold A3. .
- the second rotating element 9, 10 and the phasing element 13 respectively to comprise a third stop 52 and a fourth stop 51 arranged so that: when the angular displacement between the first rotating element 7 and the second rotating element 9,10 reaches a third threshold A3, A3 'of angular displacement between the first rotating element 7 and the second rotating element 9, 10 from a relative angular position of rest taken by the second rotating element 9, 10 and the first element when no torque is transmitted, the third stop 52 and the fourth stop 51 bear against each other and the second stage of springs E2 ceases to compress when the angular displacement between the first rotating element 7 and the second rotating element 9, 10 increases beyond the third threshold A3.
- An exemplary embodiment of this variant is shown in FIG.
- the third stop 52 is formed by a tab integral with the guide washer 10 of the second rotating element. This tab 52 extends axially.
- the fourth stop 51 is formed by a tab formed on the insert 15 of the phasing element 13. This tab can extend radially outwards.
- Other variants of the torsion damping device can be implemented without departing from the scope of the invention.
- the system in which the torsion damping device is mounted may be any system within a torque transmission chain that requires torsional damping, such as a clutch disk, or a double damper steering wheel.
- the functions of the main damper and the secondary damper can be provided by a single spring or by any number of springs, possibly in series or in parallel.
- the abutment of the additional guide washers on the second rotating element can be realized differently, for example by other stops disposed near the center of the disc.
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1758776A FR3071571B1 (fr) | 2017-09-22 | 2017-09-22 | Dispositif d'amortissement de torsion a amortisseur principal et amortisseur additionnel |
| FR1851173A FR3071575B1 (fr) | 2017-09-22 | 2018-02-12 | Dispositif d'amortissement de torsion a amortisseur principal et amortisseur additionnel |
| PCT/FR2018/052292 WO2019058057A1 (fr) | 2017-09-22 | 2018-09-20 | Dispositif d'amortissement de torsion a amortisseur principal et amortisseur additionnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3685071A1 true EP3685071A1 (fr) | 2020-07-29 |
Family
ID=61003087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18801012.8A Pending EP3685071A1 (fr) | 2017-09-22 | 2018-09-20 | Dispositif d'amortissement de torsion a amortisseur principal et amortisseur additionnel |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11674553B2 (fr) |
| EP (1) | EP3685071A1 (fr) |
| JP (1) | JP7264883B2 (fr) |
| CN (1) | CN111386409B (fr) |
| FR (2) | FR3071571B1 (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3079574B1 (fr) * | 2018-03-30 | 2020-09-04 | Valeo Embrayages | Dispositif d'amortissement de torsion a amortisseur principal et amortisseur additionnel |
| FR3102817B1 (fr) * | 2019-10-31 | 2021-11-19 | Valeo Embrayages | Amortisseur de torsion avec dispositif de fin de course |
| JP7477396B2 (ja) * | 2020-08-07 | 2024-05-01 | 株式会社エクセディ | ダンパ装置 |
| JP7461827B2 (ja) * | 2020-08-07 | 2024-04-04 | 株式会社エクセディ | ダンパ装置 |
| FR3131608A1 (fr) * | 2021-12-31 | 2023-07-07 | Valeo Embrayages | Dispositif d’amortissement de torsion |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2772862B1 (fr) * | 1997-12-23 | 2000-02-04 | Valeo | Amortisseur de torsion, notamment pour embrayage de verrouillage d'un appareil d'accouplement hydrocinetique |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2446976C2 (de) * | 1974-10-02 | 1984-10-31 | LuK Lamellen und Kupplungsbau GmbH, 7580 Bühl | Kupplungsscheibe |
| JPS57134019A (en) * | 1981-02-13 | 1982-08-19 | Daikin Mfg Co Ltd | Clutch disc |
| DE3802106A1 (de) | 1988-01-26 | 1989-08-03 | Daimler Benz Ag | Geteiltes schwungrad |
| JPH11303892A (ja) * | 1998-04-17 | 1999-11-02 | Exedy Corp | ダンパーディスク組立体 |
| JP3683165B2 (ja) | 2000-07-27 | 2005-08-17 | トヨタ自動車株式会社 | トルク変動吸収装置のトルクリミッター部組付け偏芯低減構造および方法 |
| JP4298992B2 (ja) * | 2002-06-07 | 2009-07-22 | 株式会社エクセディ | ダンパーディスク組立体 |
| FR3025266B1 (fr) * | 2014-08-28 | 2018-01-19 | Valeo Embrayages | Dispositif de transmission de couple pour un vehicule automobile |
| FR3027642B1 (fr) * | 2014-10-27 | 2020-02-21 | Valeo Embrayages | Dispositif d'amortissement d'oscillations de torsion |
| FR3029581B1 (fr) * | 2014-12-05 | 2018-03-30 | Valeo Embrayages | Dispositif de transmission de couple pour un vehicule automobile |
| FR3034481B1 (fr) * | 2015-03-30 | 2019-11-22 | Valeo Embrayages | Dispositif de transmission de couple pour un vehicule automobile |
-
2017
- 2017-09-22 FR FR1758776A patent/FR3071571B1/fr active Active
-
2018
- 2018-02-12 FR FR1851173A patent/FR3071575B1/fr active Active
- 2018-09-20 EP EP18801012.8A patent/EP3685071A1/fr active Pending
- 2018-09-20 JP JP2020516616A patent/JP7264883B2/ja active Active
- 2018-09-20 US US16/649,458 patent/US11674553B2/en active Active
- 2018-09-20 CN CN201880075739.5A patent/CN111386409B/zh active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2772862B1 (fr) * | 1997-12-23 | 2000-02-04 | Valeo | Amortisseur de torsion, notamment pour embrayage de verrouillage d'un appareil d'accouplement hydrocinetique |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3071575B1 (fr) | 2020-07-10 |
| FR3071571B1 (fr) | 2020-01-03 |
| FR3071571A1 (fr) | 2019-03-29 |
| JP2020534489A (ja) | 2020-11-26 |
| CN111386409B (zh) | 2023-03-10 |
| US11674553B2 (en) | 2023-06-13 |
| FR3071575A1 (fr) | 2019-03-29 |
| JP7264883B2 (ja) | 2023-04-25 |
| US20200256396A1 (en) | 2020-08-13 |
| CN111386409A (zh) | 2020-07-07 |
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