EP4051925A1 - Amortisseur de torsion avec dispositif de fin de course - Google Patents
Amortisseur de torsion avec dispositif de fin de courseInfo
- Publication number
- EP4051925A1 EP4051925A1 EP20800003.4A EP20800003A EP4051925A1 EP 4051925 A1 EP4051925 A1 EP 4051925A1 EP 20800003 A EP20800003 A EP 20800003A EP 4051925 A1 EP4051925 A1 EP 4051925A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- washer
- inner disc
- rotation
- group
- springs
- 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.)
- Withdrawn
Links
- 230000000295 complement effect Effects 0.000 claims description 46
- 230000035939 shock Effects 0.000 claims description 24
- 239000006096 absorbing agent Substances 0.000 claims description 23
- 238000006073 displacement reaction Methods 0.000 claims description 23
- 230000005540 biological transmission Effects 0.000 claims description 22
- 230000000284 resting effect Effects 0.000 claims 1
- 239000002184 metal Substances 0.000 description 5
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 210000002105 tongue Anatomy 0.000 description 1
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
-
- 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
- F16F15/1217—Motion-limiting means, e.g. means for locking the spring unit in pre-defined positions
- F16F15/1218—Motion-limiting means, e.g. means for locking the spring unit in pre-defined positions by means of spring-loaded radially arranged locking means
-
- 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
- F16F2230/00—Purpose; Design features
- F16F2230/0052—Physically guiding or influencing
- F16F2230/007—Physically guiding or influencing with, or used as an end stop or buffer; Limiting excessive axial separation
Definitions
- the invention relates to the field of torsion dampers for powertrains of vehicles, in particular motor vehicles.
- the invention relates in particular to a torsion damper comprising a limit switch device.
- torsion dampers for vehicle powertrains with two side washers, an inner disc also sometimes called a veil, and springs capable of compressing during relative rotation between the two side washers and the inner disc.
- Such torsion dampers may include limit switch devices limiting the relative angular displacement between the two side washers and the inner disc, the limit switch devices comprising stop elements formed in particular by the connecting spacers of the two side washers. .
- Some applications include one or more intermediate washers disposed axially between one of the side washers and the inner disc.
- This intermediate washer may for example be a phasing washer transmitting a force between two springs arranged in series between the side washers and the inner disc, or else a hysteresis washer, or else a pendulum support ...
- the implementation of known limit switch devices is more complicated and the relative angular displacement between the two side washers and the inner disc must be reduced.
- An object of the invention is to solve the above-mentioned problems.
- the invention relates to a torsion damper for a vehicle powertrain, the torsion damper comprising:
- an intermediate washer being able to rotate along the X axis relative to the inner disc and relative to the first lateral washer, the intermediate washer having a radially outer contour
- a limit switch device limiting the relative angular displacement between the two lateral washers and the inner disc in a first direction of relative rotation from the relative rest position
- the limit switch device comprising a stop element associated with the first washer side and a complementary stop element associated with the inner disc, the complementary stop element and the stop element being arranged to come to bear circumferentially against each other when the relative angular displacement angle between the two washers sides and the inner disc of G damper reaches, in the first direction of relative rotation and from the relative position of rest, a first predetermined threshold.
- the first side washer includes a stopper comprising the stop member and a bypass portion, the bypass portion being arranged radially outside the radially outer contour of the intermediate washer.
- the limit switch device is produced despite the presence of intermediate washer (s).
- the intermediate washer does not obstruct the stopper.
- the middle washer and the first side washer are free to rotate relative to each other.
- the entire radially outer contour of the intermediate washer is taken into account, ie all around the axis of rotation X.
- the invention thus offers more freedom in the design of torsion damper architectures.
- the stop element can be radially remote from the axis of rotation X, which makes it possible to limit the forces supported by the stop element.
- the proposed limit switch device offers a significant angular displacement, despite the presence of intermediate washer (s).
- An objective of the invention is also to transmit a large torque with the limit switch device, for example greater than 100ONm
- An object of the invention is also to allow a large angular displacement between the inner disc and the two side washers, for example greater than 60 degrees from one extreme position to the other.
- the torsion damper may also have one or more of the following features:
- the bypass portion extends axially on either side of the intermediate washer.
- the stopper member is disposed radially within the radially outer contour of the intermediate washer.
- the bypass portion is arranged radially on the outside of the intermediate washer.
- the stopper is a leg having, in a plane comprising the axis of rotation X and passing through the leg, an L-shaped section.
- the tab has a bend with an angle between 80 degrees and 100 degrees, for example 90 degrees, so that the stopper member is oriented in the direction of the axis of rotation X, when observed in a plane including the axis of rotation X.
- An end region of the tab forms the stop element.
- a proximal portion of the tab forms the bypass portion.
- the stop member forms a protuberance comprising the stop element and in one extension, the bypass portion.
- the first lateral washer and its tab are formed in a sheet.
- the stop member defines a concavity in which is arranged, for at least one relative angular displacement angle between the first and second lateral washers on the one hand and the inner disc on the other hand, part of the radially outer contour of the intermediate washer.
- the bypass portion and the stop member jointly define the concavity.
- the inner disc comprises at least one arm, the complementary stop member of the inner disc being formed on one of the arms of the inner disc.
- the inner disc is located axially between the intermediate washer and the second side washer
- the intermediate washer is arranged axially between a front portion of the first lateral washer devoid of the stops and all or part of the inner disc.
- the intermediate washer is arranged axially between a front portion of the first side washer devoid of the stops and all or part of the second side washer.
- the bypass portion connects the front portion of the first side washer to the stop member.
- the inner disc generally extends in a plane perpendicular to the axis of rotation X.
- the intermediate washer is arranged axially between the front portion of the first lateral washer and the inner disc
- the plurality of elastic members comprises on the one hand a first group of springs and a second group of springs arranged in series between the two side washers and the inner disc, the intermediate washer being a phasing washer comprising transmission portions, each transmission portion being disposed circumferentially between a spring of the first group of springs and a spring of the second group of springs so as to transmit a force from the first group of springs to the second group of springs and vice versa.
- the phasing washer includes a ring from which the transmission portions extend radially.
- the phasing washer ring is disposed radially within the first group of springs and the second group of springs.
- the part of the radially outer contour of the intermediate washer which is arranged in the concavity of the stop member is formed by the radially outer contour of one at least transmission portions.
- the phasing washer is a first phasing washer and the torsion damper further includes a second phasing washer configured to transmit a force from the first group of springs to the second group of springs, the stop member and the member. complementary stopper being located axially between the first phasing washer and the second phasing washer.
- the bypass portion is disposed radially vis-à-vis one of the transmission portions of the phasing washer.
- the bypass portion radially covers the transmission portion of the phasing washer.
- the shock absorber is configured so that the two side washers and the inner disc can rotate in a second relative rotational direction (S2), opposite to the first relative rotational direction, from the relative rest position.
- Each side washer comprises first bearing surfaces cooperating with the first group of springs in the first direction of relative rotation and second bearing surfaces cooperating with the second group of springs in a second direction of relative rotation opposite to the first direction of rotation. relative rotation.
- the inner disc comprises first bearing surfaces cooperating with the first group of springs in the second direction of relative rotation and second bearing surfaces cooperating with the second group of springs in the first direction of relative rotation.
- Each side washer comprises windows delimited circumferentially on the one hand by one of its first bearing surfaces and on the other hand by one of its second bearing surfaces.
- the inner disc includes a plurality of arms, each arm carrying one of the first supporting surfaces and one of the second supporting surfaces of the inner disc.
- Each arm has a first portion delimited circumferentially by a first bearing surface and a second bearing surface of the inner disc.
- Each arm has a second portion forming the complementary stop element.
- the second portion of the arm is arranged radially outside the first portion of the arm.
- the second portion of the arm is arranged in the extension of the first portion of the arm.
- the inner disc includes an annular portion from which the arms extend radially.
- the annular portion of the inner disc is disposed radially within the first group of springs and the second group of springs.
- Each arm develops in a plane perpendicular to the axis of rotation X.
- Each arm extends substantially radially.
- the contact surface of the complementary stop element is formed on the edge of the arm, in other words in the thickness of the arm.
- the tab end area develops substantially in the same plane as the inner disc arm so that the tab end area and the arm can press circumferentially against each other when the relative angular displacement angle between the first and second lateral washers and the internal disc of the damper has reached, in the first direction of relative rotation and from the relative position of rest, the first predetermined threshold.
- the shock absorber is configured so that the first group of springs is compressed between the first bearing surfaces of the two side washers and the phasing washer in the first direction of relative rotation.
- the shock absorber is configured so that the first group of springs is compressed between the first bearing surfaces of the inner disc and the phasing washer in the second direction of relative rotation.
- the shock absorber is configured so that the second group of springs is compressed between the second bearing surfaces of the inner disc and the phasing washer in the first direction of relative rotation.
- the shock absorber is configured so that the second group of springs is compressed between the second bearing surfaces of the two side washers and the phasing washer in the second direction of relative rotation.
- the first group of springs and the second group of springs are arranged on the same diameter.
- the intermediate washer is a first intermediate washer and the torsion damper includes a second intermediate washer.
- the first intermediate washer is a first phasing washer and the second intermediate washer is a second phasing washer.
- the second phasing washer comprises transmission portions, each transmission portion being disposed circumferentially between a spring of the first group of springs and a spring of the second group of springs so as to transmit a force from the first group of springs to the second group of springs. springs and vice versa.
- the shock absorber is configured so that the first group of springs is compressed between the first bearing surfaces of the two side washers and the second phasing washer in the first direction of relative rotation.
- the damper is configured so that the second group of springs is compressed between the first bearing surfaces of the inner disc and the second phasing washer in the first direction of relative rotation.
- the damper is configured so that the first group of springs is compressed between the second bearing surfaces of the two side washers and the second phasing washer in the second direction of relative rotation.
- the shock absorber is configured so that the second group of springs is compressed between the second bearing surfaces of the inner disc and the second phasing washer in the second direction of relative rotation.
- the inner disc is arranged axially between the first intermediate washer and the second intermediate washer.
- At least one of the first side washer and the second side washer comprises a skirt extending along the axis of rotation, the intermediate washer and the inner disc being arranged radially inside the skirt, with overlap. radial.
- the first and second side washers form a cassette.
- the skirt is formed on the first side washer.
- the skirt is located on a radially outer portion of the first lateral washer.
- the first phasing washer and the second phasing washer are arranged radially inside the skirt, with radial overlap.
- Fasteners secure the first side washer to the second side washer.
- One of the first side washer and the second side washer has fasteners including tabs and the other of the first side washer and the second washer has holes or notches, into which the tabs are inserted.
- the tongues project axially from the skirt.
- the tabs are formed in the sheet metal of the first side washer.
- the skirt develops discontinuously around the axis of rotation X.
- the skirt includes at least one interruption in which the stop member is located. In other words, the skirt does not develop 360 degrees around the axis of rotation.
- the skirt develops over at least 250 degrees around the axis of rotation, in particular over at least 300 degrees, in particular over at least 320 degrees around the axis of rotation.
- the plurality of elastic members further comprises a third group of springs arranged so as to cooperate with the two side washers and the inner disc, the third group of springs being arranged in parallel with the assembly made up of the first and second groups of springs. .
- the third group of springs is arranged radially within the first and second groups of springs. According to variants, the third group of springs may include a different number of springs. These springs can be straight or curved.
- the shock absorber is configured so that the springs of the third group of springs can be circumferentially compressed between the two side washers and the inner disc, during a relative rotation between the two side washers and the inner disc with respect to the axis of rotation X.
- the stop element is arranged to come to bear circumferentially against another stop element complementary to the inner disc when the relative angular displacement angle between the two side washers and the inner disc of the shock absorber is reached, in a second direction of relative rotation opposite to the first direction of relative rotation and from the relative position of rest, a second predetermined threshold.
- the springs of the first group of springs, or of the second group of springs, or of the third group of springs may have additional internal springs.
- the stopper member includes a first contact surface located on a first circumferential end of the stopper member and a second contact surface located on an opposite second circumferential end of the stopper member.
- the first contact surface and / or the second contact surface of the stop member are formed in the thickness of the sheet metal of the first side washer.
- the first contact surface of the stop element is arranged so as to bear against the complementary stop element of a first arm in the first direction of relative rotation and the second contact surface of the stop element is arranged so as to bear against the complementary stop element of a second arm in the second direction of relative rotation.
- Each stop element therefore acts bidirectionally.
- the complementary stopper element includes a first contact surface located on a first circumferential end of the complementary stopper element and a second contact surface located on an opposite second circumferential end of the complementary stopper element.
- the first contact surface and / or the second contact surface of the complementary stop member are formed in the thickness of the sheet metal of the first side washer.
- the first contact surface of the complementary stop element is arranged so as to bear against the stop element of a first stop member in the first direction of relative rotation and the second contact surface of the complementary stop element is arranged so as to bear against the stop element of a second stop member in the second direction of relative rotation.
- Each complementary stop element therefore acts bidirectionally.
- the complementary stop elements have circumferentially projecting portions, these projecting portions are arranged radially on the outside of the springs so as to retain them.
- Each protruding portion carries a contact surface of the complementary abutment member.
- the shock absorber comprises a plurality of stops members and the inner disc comprises a plurality of complementary stop elements.
- the first side washer includes a first group of stopper and one of the first side washer and the second side washer includes a second group of stopper.
- the first group of stop members is arranged to come into abutment against the inner disc in the first direction of relative rotation and the second group of stop members is arranged to come into abutment against the inner disc in the second direction. of relative rotation.
- the inner disc includes a first inner washer and a second inner washer which are axially offset and rotatably integral with each other.
- Each stopper of the first group of stopper members includes a stopper element which cooperates only with a complementary stopper element carried by the first inner washer.
- Each stopper of the second group of stopper members includes a stopper element which cooperates only with a complementary stopper element carried by the second inner washer.
- the first lateral washer comprises a first group of stop members arranged to come into abutment against the inner disc only in the first direction of relative rotation and the second lateral washer comprises a second group of stop members arranged to come into abutment against the inner disc only in the second direction of relative rotation.
- the characteristics of the arresters of the first group of arresters are applicable to the arresters of the second group of arresters.
- the invention also relates to a torque transmission device comprising an input member and an output member and a damper as described above, one of the input member and the output member being mounted integrally in rotation of the inner disc and the other among the input member and the output member being mounted integral in rotation with the two side washers.
- the input member is located relative to the shock absorber on the side of the motor or the electric machine generating the driving torque.
- the output member is located relative to the shock absorber on the wheel side of the vehicle.
- the output organ is a hub.
- the inner disc is fixed, in particular via its radially inner edge, to the hub.
- the input member may be a friction disc.
- shock absorber can be used equally well within a powertrain operating with an electric machine, a thermal or hybrid engine.
- FIG.l is an exploded perspective view of a first embodiment of the invention.
- FIG.2 shows a sectional view of the first embodiment of the invention.
- FIG.3 is an enlarged partial sectional view of the first embodiment of the invention.
- FIG.4 shows a partial front view of the first embodiment of the invention, without the second side washer.
- FIG.5 is an exploded perspective view of a second embodiment of the invention.
- FIG.6 is a perspective view of the first side washer of the second embodiment of the invention.
- FIG.7 shows a partial enlarged perspective view of a stopper of the second embodiment of the invention.
- FIG.8 is an exploded perspective view of the inner disc of the second embodiment of the invention.
- FIG.9 shows a front view of the second embodiment of the invention, without the second side washer.
- the terms "external” and “internal” as well as the "axial” and “radial” orientations will be used to denote, according to the definitions given in the description, elements of the torsion damper.
- the axis of rotation X determines the axial orientation and the "radial” orientation is directed orthogonally to the axis (X) of rotation.
- the "circumferential” orientation is directed orthogonally to the axis of rotation of the torsion damper and orthogonally to the radial direction.
- an element described as developing circumferentially is an element of which a component develops in a circumferential direction.
- the indication of an angle is interpreted as delimited by two straight lines of a plane perpendicular to G axis of rotation X and secant at the level of said axis of rotation X.
- the terms "external” and “internal” are used. to define the relative position of an element with respect to another, by reference to the axis of rotation of the torsion damper, an element close to the axis is thus qualified as internal as opposed to an external element located radially at the periphery.
- FIG 1 is an exploded perspective view of a first embodiment of the invention. It shows a torsion damper 100, also referred to hereinafter as a damper 100, for a motor vehicle powertrain.
- the torsion damper 100 comprises two lateral washers 11, 12, namely a first lateral washer 11 and a second lateral washer 12 capable of rotating about an axis of rotation X and integral in rotation with one another by relative to the axis of rotation X.
- the shock absorber 100 also comprises an internal disc 21 arranged entirely in a space delimited axially by the two lateral washers 11 and 12.
- the damper 100 comprises a plurality of elastic members 30 arranged so as to deform during relative rotation, along the axis of rotation X, between the two side washers 11, 12 on the one hand and the inner disc 21 on the other hand, by exerting an elastic return force capable of bringing the two side washers 11, 12 and the inner disc 21 into a relative rest position.
- the plurality of elastic members here comprises on the one hand a first group of three springs 31 and a second group of three springs 32 arranged in series between the two side washers 11, 12 and the inner disc 21.
- the plurality of elastic members further comprises a third group of three springs 33 arranged so as to cooperate with the two side washers 11, 12 and the inner disc, the third group of springs 33 being arranged in parallel with the assembly made up of the first and second groups of springs 31, 32.
- the springs of the third group of springs 33 can be compressed circumferentially between the two side washers 11, 12 and the inner disc 21, during a relative rotation between the two side washers and the inner disc with respect.
- the third group of springs 33 is arranged radially inside the first and second groups of springs.
- a phasing member comprising a first phasing washer 41 and a second phasing washer 42, is able to rotate along the X axis with respect to the inner disc 21 and with respect to the two lateral washers 11 and 12.
- the first washer of phasing 41 is the intermediate washer to bypass
- Each lateral washer 11, 12 comprises first bearing surfaces 111, 121 cooperating with the first group of springs 31 in the first direction of relative rotation S 1 and second bearing surfaces 112, 122 cooperating with the second group of springs 32 in a second direction of relative rotation S2 opposite to the first direction of relative rotation.
- the inner disc 21 comprises first bearing surfaces 211 cooperating with the first group of springs 31 in the second relative direction of rotation S2 and second bearing surfaces 212 cooperating with the second group of springs 32 in the first direction of rotation. relative S 1.
- Each side washer 11, 12 comprises three windows 130 delimited circumferentially on the one hand by one of its first bearing surfaces 111, 121 and on the other hand by one of its second bearing surfaces 112, 122.
- the inner disc 21 comprises three arms 23, each arm 23 carrying one of the first bearing surfaces 211 and one of the second bearing surfaces 212 of the inner disc 21.
- the first phasing washer 41 has a radially outer contour 13.
- the first phasing washer 41 and the second phasing washer 42 each comprise three transmission portions 43, each transmission portion 43 being disposed circumferentially between a spring of the first group of springs 31 and a spring of the second group of springs 32 so as to transmitting a force from the first group of springs 31 to the second group of springs 32 and vice versa.
- the first phasing washer 41 and the second phasing washer 42 each comprise a ring 49 from which the three transmission portions 43 extend radially.
- the inner disc is disposed axially between the first phasing washer 41 and the second phasing washer 42.
- the first phasing washer and the second phasing washer are secured to one another and kept axially spaced apart by spacer rivets 48.
- the rings 49 of the first and second phasing washers 41, 42 are disposed radially inside the first group of springs 31 and the second group of springs 32.
- a limit switch device 50 limits the relative angular displacement between the two lateral washers 11, 12 and the inner disc 21 in a first relative direction of rotation SI from the relative rest position of G damper.
- the limit switch device 50 comprises three stop elements 52 associated with the first lateral washer 11 and three complementary stop elements 51 associated with the inner disc 21.
- Each complementary stop element 51 is arranged to come to bear circumferentially against a first stop element 52 when the relative angular displacement angle between the two side washers 11, 12 and the inner disc 21 of the damper is reached, in the first relative direction of rotation SI and from the relative position of rest, a first predetermined threshold.
- the first lateral washer 11 comprises three stops 19 each comprising a stop element 52.
- the inner disc 21 comprises three arms 23, each arm 23 comprising a complementary stop element 51 of the inner disc 21.
- Each arm 23 comprises a first portion 23-1 delimited circumferentially by a first bearing surface 211 and a second bearing surface 212 of the inner disc 21.
- Each arm 23 comprises a second portion 23-2 forming the complementary stop element. 51.
- the second portion 23-2 of the arm is arranged radially outside the first portion 23-1 of the arm 23.
- the second portion 23-2 of the arm 23 is arranged in the extension of the first portion 23-1 of the arm. arm 23.
- the inner disc 21 comprises an annular portion from which the arms 23 extend radially.
- the annular portion of the inner disc 21 is disposed radially inside the first group of springs 31 and the second group of springs 32.
- the portion annular of the inner disc 21 comprises recesses each receiving a spring from the third group of springs 33.
- Each arm 23 develops in a plane perpendicular to the axis of rotation X and extends radially outwards.
- the contact surface of the complementary stop element 51 bearing against the stop element 52 of the first lateral washer 11 is formed on the edge of the arm 23, in other words in the thickness of the arm 23.
- the damper 100 is also configured so that the two side washers 11, 12 and the inner disc 21 can rotate in a second relative direction of rotation S2, opposite to the first relative direction of rotation SI, from the relative position of rest.
- the first group of springs 31 is compressed between the first bearing surfaces 111, 121 of the two side washers 11, 12 and the phasing member 41, 42 in the first direction of relative rotation S1.
- the first group of springs is compressed between the first bearing surfaces 211 of the inner disc 21 and the phasing member 41, 42 in the second direction of relative rotation S2.
- the second group of springs 32 is compressed between the second bearing surfaces 212 of the inner disc 21 and the phasing member 41, 42 in the first direction of relative rotation S1.
- the second group of springs 32 is compressed between the second bearing surfaces 112, 122 of the two side washers 11, 12 and the phasing member 41, 42 in the second direction of relative rotation S2.
- the springs of the first group of springs 31, of the second group of springs 32, and of the third group of springs further include additional internal springs.
- the inner disc 21 is located axially between the first phasing washer 41 and the second lateral washer 12.
- the inner disc 21 extends in a plane perpendicular to the X axis.
- phasing 41 is arranged axially between a front portion 15 of the first lateral washer 11 devoid of the stop members 19 and the second lateral washer 12.
- the first phasing washer 41 is arranged axially between a front portion 15 of the first side washer 11 without the stop members 19 and the inner disc 21.
- Figure 3 provides a better view of the stop member 19.
- the stop member 19 includes a bypass portion 16.
- the stop element 52 is disposed radially inside the radially outer contour 13 of the first phasing washer 4L
- the bypass portion 16 of the stop member 19 is arranged radially outside the first phasing washer.
- the stop member 52 is sufficiently far from the axis of rotation X to withstand a reasonable amount of force and the relative angular displacement is sufficient.
- the stop member 19 is a tab 19 having, in a plane comprising the axis of rotation X and passing through the tab, an L-shaped section. of the tab 19 forms the stop element 52, and a proximal portion of the tab 19 forms the bypass portion 16.
- the stop element 52 is therefore formed in the extension of the bypass portion 16.
- the bypass portion 16 connects the front portion 15 of the first lateral washer li to the stop element 52
- the first side washer 11 and its tab 19 are formed from the same sheet.
- FIG. 3 which shows a view of the stop member 19 in a plane comprising the axis of rotation X and passing through the stop member 19, it can be seen that the stop member 19 defines a concavity 190 in which is arranged, for at least one relative angular displacement angle between the first and second lateral washers 11, 12 on the one hand and the inner disc 21 on the other hand, a part of the radially outer contour 13 of the first washer phasing 4L A compact shock absorber is thus obtained.
- the bypass portion 16 and the stop member 52 jointly define the concavity 190.
- the end areas of the legs 19 develop substantially in the same plane as the arms 23 of the inner disc 21 so that the end areas of the legs 19 and of the arms 23 can rest circumferentially against each other, via their edge, when the relative angular displacement angle between the first and second lateral washers 11, 12 and the internal disc 21 of the shock absorber has reached, in the first direction of relative rotation and from the relative position of rest, the first predetermined threshold.
- the damper is configured so that, for at least one relative angular position between the two side washers 11, 12 and the inner disc 21, the part of the radially outer contour 13 of the first phasing washer 41 which is disposed in the concavity of the stop member is formed by the radially outer contour of at least one of the transmission portions 43.
- each bypass portion 16 is disposed radially opposite a transmission portion 43 of the first phasing washer 4L
- the bypass portion 16 radially covers the transmission portion 43 of the first phasing washer 4L
- the first lateral washer 11 comprises on its radially outer portion a skirt 40 which extends along the axis of rotation X.
- the first washer phasing 41, the inner disc 21, and the second phasing washer 42 are arranged radially inside the skirt 40, with radial overlap.
- the skirt 40 extends axially as far as the second lateral washer 12.
- the first and second lateral washers 11 and 12 form a cassette.
- the first side washer 11 comprises fastening elements 61 in the form of tabs 62 and the second side washer 12 comprises notches 63, in which the tabs 62 are inserted. These tabs 62 project axially from the skirt 40.
- the tabs 62 are formed. also in the sheet of the first side washer 11. These tabs 62 can be crimped or welded to the second side washer 12.
- the skirt 40 develops discontinuously around the axis of rotation X.
- the skirt comprises three interruptions in which the three stop members 19 are respectively arranged.
- each complementary stop element 51 is arranged to come to bear circumferentially against a first stop element 52 of the first lateral washer 11 in the first direction of relative rotation and against a second stop element 52 of the first lateral washer 11 when the relative angular displacement angle between the two lateral washers 11, 12 and the inner disc 21 of the shock absorber is reached, in the second relative direction of rotation S2 opposite to the first relative direction of rotation and from the position relative rest, a second predetermined threshold.
- each complementary stop element 51 acts bidirectionally.
- each stop element 52 is arranged to come to bear circumferentially against a first complementary stop element 51 of the inner disc 21, and also against a second complementary stop element 51 of the inner disc 21 when the relative angular displacement angle between the two side washers 11, 12 and the internal disc 21 of the damper reached, in the second relative direction of rotation S2 opposite to the first relative direction of rotation and from the relative position of rest, the second predetermined threshold.
- each stop element 52 also acts bidirectionally.
- each stopper member 52 includes a first contact surface located on a first circumferential end of the stopper member 52 and a second contact surface located on an opposite second circumferential end of the stopper member. 52.
- the first contact surface and the second contact surface of the stopper member 52 are formed in the thickness of the sheet metal of the first side washer 11.
- the first contact surface of the stopper member 52 is provided. so as to come to bear against the complementary stop element 51 of a first arm 23 in the first direction of relative rotation SI and the second contact surface of the stop element 52 is arranged so as to come to bear against the complementary stop element 51 of a second arm 23 in the second direction of relative rotation S2.
- the complementary stop element 51 comprises a first contact surface located on a first extr circumferentially emitted from the complementary stop element 51 and a second contact surface located on an opposite circumferential second end of the complementary stopper element 51.
- the first contact surface and the second contact surface of the complementary stopper element 51 are formed in the thickness of the sheet metal of the first one. lateral washer 11.
- the first contact surface of the complementary stop element 51 is arranged so as to bear against the stop element 52 of a first stop member 19 in the first direction of relative rotation SI and the second contact surface of the complementary stop element 51 is arranged so as to bear against the stop element 52 of a second stop member 19 in the second direction of relative rotation S2.
- the complementary stop elements 51 have circumferentially projecting portions. These protruding portions are arranged radially on the outside of the springs of the first group of springs 31 and of the second group of springs 32 so as to retain them. Each protruding portion carries a contact surface of the complementary stop element 51.
- the first side washer 11 includes a first group of stopper 19a and a second group of stopper 19b.
- the first group of stop members 19a is arranged to come into abutment against the inner disc 21 in the first relative direction of rotation SI and the second group of stop members 19b is arranged to come into abutment against the inner disc 21 in the second direction of relative rotation.
- the inner disc 21 includes a first inner washer 21a and a second inner washer 21b which are axially offset and rotatably integral with each other.
- Each stopper of the first group of stopper members 19a includes a stopper element 52 which cooperates only with a complementary stopper element 51 carried by the first inner washer 21a.
- each stopper of the second group of stopper members 19b includes a stopper element 52 which cooperates only with a complementary stopper element 51 carried by the second inner washer 21b.
- the stop members 52 of the first group of stops 19a are axially offset from the stop members 52 of the second group of stop members 19b.
- the bypass portions 16 of the stop members of the first group of stop members 19a and the bypass portions 16 of the stop members of the second group of stop members 19b therefore have different axial dimensions.
- the arms 23 of the first and second inner washers 21a and 21b are arranged in pairs facing each other.
- the arms 23 of each pair have different geometries in order to adjust the angular displacement as desired with the first group of stop members 19a and the second group of stop members 19b.
- the first lateral washer comprises a first group of members. stopper arranged to come into abutment against the inner disc in the first direction of relative rotation and the second lateral washer comprises a second group of stop members arranged to abut against the inner disc in the second direction of relative rotation .
- the shock absorber comprises two internal discs integral in rotation with one another and axially spaced apart, a phasing washer being disposed axially between the two internal discs, the first lateral washer having certain suitable stops. to come to bear against one of the inner discs, and the first lateral washer having other stopping members capable of coming to bear against the other of the inner discs passing radially outside the first inner disc and of the phasing washer.
- the phasing washers can be made in several parts.
- the transmission portions can be added. These can be, for example, built-in anchors.
- the shocks described here have groups of three springs, side washers with three windows, an inner disc with three arms, phasing washers with three transmission portions and three stop members. It is possible to adapt the shock absorber so that it has groups of two or four springs or more, side washers with respectively two or four windows or more, an inner disc with respectively two or four arms or more, phasing washers with respectively two or four transmission portions or more, and respectively two or four stop members, or even more.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
- Vibration Dampers (AREA)
- Springs (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1912296A FR3102817B1 (fr) | 2019-10-31 | 2019-10-31 | Amortisseur de torsion avec dispositif de fin de course |
PCT/EP2020/025477 WO2021083550A1 (fr) | 2019-10-31 | 2020-10-28 | Amortisseur de torsion avec dispositif de fin de course |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4051925A1 true EP4051925A1 (fr) | 2022-09-07 |
Family
ID=69468828
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20800003.4A Withdrawn EP4051925A1 (fr) | 2019-10-31 | 2020-10-28 | Amortisseur de torsion avec dispositif de fin de course |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP4051925A1 (fr) |
JP (1) | JP2022554296A (fr) |
CN (1) | CN218935157U (fr) |
FR (1) | FR3102817B1 (fr) |
WO (1) | WO2021083550A1 (fr) |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3071571B1 (fr) * | 2017-09-22 | 2020-01-03 | Valeo Embrayages | Dispositif d'amortissement de torsion a amortisseur principal et amortisseur additionnel |
-
2019
- 2019-10-31 FR FR1912296A patent/FR3102817B1/fr active Active
-
2020
- 2020-10-28 CN CN202090001021.4U patent/CN218935157U/zh active Active
- 2020-10-28 JP JP2022525367A patent/JP2022554296A/ja active Pending
- 2020-10-28 WO PCT/EP2020/025477 patent/WO2021083550A1/fr unknown
- 2020-10-28 EP EP20800003.4A patent/EP4051925A1/fr not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
FR3102817B1 (fr) | 2021-11-19 |
CN218935157U (zh) | 2023-04-28 |
FR3102817A1 (fr) | 2021-05-07 |
JP2022554296A (ja) | 2022-12-28 |
WO2021083550A1 (fr) | 2021-05-06 |
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