• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a torque transmission device for a motor vehicle, comprising a torque input element (7a, 7b), a torque output member (24, 8), at least a first elastic member (10a). and at least one second elastic member (10b), arranged in series via a phasing member (29a, 29b), characterized in that it comprises at least one third elastic member (10c) mounted with a set circumferential between the phasing member (29a, 29b) and the torque output member (24, 8), in parallel with the second elastic member (10b) and adapted to act against the rotation of the member phasing (29a, 29b) relative to the torque output member (24, 8).
    公开号:FR3034481A1
    申请号:FR1552657
    申请日:2015-03-30
    公开日:2016-10-07
    发明作者:Michael Hennebelle
    申请人:Valeo Embrayages SAS；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a torque transmission device for a motor vehicle.
    [0002] Such a device generally comprises a torque input element intended to be coupled directly or indirectly to a crankshaft, a torque output element intended to be coupled to an input shaft of a gearbox, and a first group of resilient members mounted between the input and torque output members and acting against the rotation of one of said input and torque output members relative to the other. When the torque transmission device is LTD (Long Travel Damper) type, it comprises several pairs of elastic members, the elastic members of the same pair being arranged in series via a phasing member so the elastic members of each group deform in phase with each other. In order to allow the damping of large torques, it is known to add to the aforementioned device a second group of elastic members, mounted with clearance between the input and torque output elements, in parallel with the first group of members. resilient and designed to act against the rotation of one of said input or torque output members over a limited angular range, particularly at the end of angular travel. The angular displacement, or the angular offset noted a, of the torque input element with respect to the torque output element, is defined with respect to a rest position (a = 0) in which no torque is transmitted through the device. The second group of elastic members makes it possible to increase the stiffness of the damping device at the end of the angular stroke, that is to say for a significant angular offset of the torque entry element with respect to the torque output element (or vice versa).
    [0003] The document US 2010/0133063 discloses a LTD type torque transmission device comprising two groups of elastic members arranged in parallel, the second group being made active only at the end of angular travel a of the input element. torque 5 relative to the torque output member (or vice versa). It can be seen that the representation of the function M = f (a) defining the torque M transmitted through the device as a function of the angular offset a, comprises a first linear portion of slope Ka (for small values of the angular offset a) and a second linear portion of slope kb larger (for the high values of the angular offset a). Ka and Kb are the angular stiffness of the device, respectively at the beginning and end of the angular stroke. If we define by K1 the cumulative stiffness of the first springs of each pair of the first group, by K2 the cumulative stiffness of the second springs of each pair of the first group and by K3 the cumulative stiffness of the springs of the second group, then Ka = (K1.K2) / (K1 + K2) and Kb = Ka + K3. The invention proposes a simple, effective and economical alternative to the torque transmission devices of the prior art. For this purpose, the invention proposes a torque transmission device for a motor vehicle, comprising a torque input element, a torque output element, at least a first elastic member and at least a second elastic member, arranged in series via a phasing member, so that the first and second elastic members deform in phase with each other, the phasing member being movable relative to the a torque input member and with respect to the torque output member, the first elastic member being mounted between the torque input member and the phasing member and being adapted to act against the rotation of the torque input member with respect to the phasing member, the second elastic member being mounted between the phasing member and the torque output member and being adapted to act against the rotation of the element of 3034481 3 sor torque pair with respect to the phasing member, on a first angular range, characterized in that it comprises at least a third elastic member mounted with a circumferential clearance between the phasing member and the torque output member in parallel with the second resilient member and adapted to act against the rotation of the phasing member relative to the torque output member over a second angular range less than the first angular range. The device may comprise two guide washers located axially on either side of an annular web, the guide washers belonging to the torque input element, the annular web belonging to the torque output element. , Or vice versa. Furthermore, the annular web may comprise an annular portion from which tabs extend radially outwards, the first and second elastic members being mounted circumferentially between said tabs of the web. In addition, the device may comprise an auxiliary annular web coupled in rotation to the torque output member, and two auxiliary guide washers, mounted on either side of the auxiliary web and pivotable relative to said auxiliary web, the auxiliary guide washers 20 being mounted with a circumferential clearance with respect to the phasing member, the third elastic member being mounted circumferentially between the auxiliary web and the auxiliary guide washers. In addition, the torque output member or the torque input member may include an inner hub for coupling to an input shaft of a gearbox and having an annular housing in which housed, at least in part, the auxiliary guide washers, the auxiliary web and / or the third elastic member. In this case, the auxiliary guide washers may be coupled to each other via at least one fastener, said auxiliary guide washers having at least one stud 3034481 4 extending into less an oblong opening in the form of a circular arc formed in the phasing member, or vice versa, so as to allow an angular displacement of the phasing member relative to the auxiliary guide washers, said deflection being limited by support of said stud on the circumferential ends of the oblong aperture. Furthermore, the phasing member may comprise at least one first element comprising an annular portion from which at least one lug extends radially inwards, the first and second elastic members bearing circumferentially on the one hand and other of said leg of the phasing member. In this case, the phasing member may comprise at least one second element comprising an annular portion from which at least one leg extends radially outwards, the first and second elements of the phasing member being coupled together. in rotation through at least one spacer, the third resilient member being mounted with circumferential clearance between the second member of the phasing member and the torque output member. The invention further relates to a hydrodynamic torque converter for a motor vehicle, characterized in that it comprises at least one device of the aforementioned type. The device according to the invention can also have at least one of the following features: the auxiliary annular web comprises an annular portion from which at least one stud projects radially outwards, said stud being engaged in a housing or a notch of complementary shape of the hub or the torque output member, in order to perform a coupling in rotation, the third elastic member is located radially inside the first elastic member and the second elastic member, means of The pendular damping means comprise an annular support on which pendulum masses are mounted in a movable manner, the support of the pendular damping means 5 is coupled in rotation to the pendulum damping means 5. the phasing member via the spacers for fixing the first and second elements of the phasing member, - u a spline hub is attached to at least one of the guide washers, said spline hub has a splined cylindrical portion from which an annular portion extends radially inwardly, said radial annular portion being fixed to the one of the guide washers, for example by riveting, the fastener of the auxiliary guide washers 15 is formed by at least one spacer or at least one rivet, the stud of said auxiliary guide washers being formed by said spacer or said rivet the elastic members are curved and / or straight helical compression springs.
    [0004] The invention will be better understood and other details, characteristics and advantages of the invention will become apparent on reading the following description given by way of nonlimiting example with reference to the accompanying drawings, in which: FIG. schematic representation of a torque converter equipped with a torque transmission device according to the invention, FIG. 2 is a perspective view of the device, FIG. 3 is an exploded perspective view of the device, FIG. FIG. 4 is a view in axial section of the device, FIG. 5 is a view corresponding to FIG. 6, in which the splined hub has been removed, FIG. 6 is an exploded perspective view of the internal hub, and of the sub-assembly formed by the auxiliary guide washers, the auxiliary web and the third elastic members, FIGS. 7 and 8 are diagrammatic views illustrating the operation of the device, FIG. a diagram showing the function M = f (a) defining the torque M transmitted through the device as a function of the angular offset α between the torque input member and the phasing member. A hydrodynamic torque converter according to the invention is shown diagrammatically and partially in FIG. 1. This converter makes it possible to transmit a torque of an output shaft of an internal combustion engine of a motor vehicle, such by example a crankshaft 1, an input shaft 2 of a gearbox. The torque converter conventionally comprises an impeller impeller 3 capable of hydrokinetically driving a turbine blade wheel 4 via a reactor 5.
    [0005] The impeller wheel 3 is coupled to the crankshaft 1 and the turbine wheel 4 is coupled to a turbine hub 6 (Figure 4), itself coupled to two guide washers 7, referenced 7a and 7b. As best seen in FIG. 2, the guide ring 7b and the turbine hub 6 are rotatably mounted about a splined central hub 8, to be coupled to the input shaft 2 of the box. speeds. The guide washer 7a is mounted around the turbine hub 6 and fixed thereto by means of pins. The two guide rings 7a, 7b extend radially and delimit between them an internal space 9 (FIG. 4) serving in particular to accommodate first elastic members 10a and second elastic members 10b, which are, for example, helical springs. compression. The guide ring 7b has a cylindrical rim 11 at its radially outer periphery, extending towards the guide washer 7a and fixed thereto. The free end of the cylindrical flange 11 comprises tabs 13 extending axially through orifices 14 of the washer 7a (Figure 3). These tongues 14 are riveted on the outer periphery of the guide washer 7a and can be welded thereto, so as to ensure the fixing of the two guide washers 7a, 7b. The guide washers 7a, 7b conventionally comprise windows 15 for accommodating the elastic members 10a, 10b. A splined hub 18 is also fixed by riveting on the rear face of the guide washer 7b. This splined hub 18 comprises a radial portion 19 fixed on said rear face of the guide washer 7b, and a corrugated cylindrical flange 20 extending rearwardly from the radially outer periphery of the radial portion 19. A clutch 21 (FIG. FIG. 1) makes it possible to transmit a torque from the crankshaft 1 to the guide washers 7, in a determined operating phase, without involving the impeller wheel 3 and the turbine wheel 4. This clutch 21 comprises an input element 22 coupled to the crankshaft 1 and an output member 23, including the splined hub 18. A radially extending annular web 24 is mounted in the inner space and is secured to the central hub 8 via rivets. As best seen in Figure 3, the annular web 24 has a radially inner annular portion 25 from which tabs 26, for example three in number, extend radially outwardly. Each lug 26 has two opposite faces 27 serving to support the elastic members 10a, 10b, inclined relative to each other 3034481 8 and relative to the radial direction. Two abutment studs 28 extend circumferentially on either side of each tab 26, at its outer periphery. The resilient members 10a, 10b are circumferentially mounted between the annular web 24 and the guide washers 7a, 7b. More particularly, the elastic members 10a, 10b are arranged in pairs. The elastic members of the same pair are arranged in series via a common phasing member 29, 10 so that the elastic members 10a, 10b deform in phase with each other. In the embodiment shown in the figures, the torque converter comprises three pairs of elastic members 10a, 10b. Thus, for each pair of resilient members 10a, 10b, depending on the direction of rotation of the guide washers 7a, 7b relative to the annular web 24, one of the resilient members (eg 10a) is intended to bear on the one hand, on the corresponding end of the windows 15 of the guide washers 7a, 7b and, on the other hand, on the phasing member 29. The other elastic member (for example 10b) is then intended to 20 bear, on the one hand, on the phasing member 29 and, on the other hand, on one of the faces 27 of the corresponding tab 26 of the annular web 24. The phasing member 29 comprises a first element 29a comprising an outer annular portion 30 from which lugs 31, here three in number, extend radially inwards (Figure 3).
    [0006] Each lug 31 has two opposite faces 32 serving to support the elastic members 10a, 10b, inclined with respect to each other and with respect to the radial direction. Two abutment zones 33, forming shoulders, extend circumferentially on either side of each tab 31.
    [0007] The abutment studs 28 of the tabs 26 of the annular web 24 are able to bear respectively on the abutment zones 33 of the bearing portions 31 of the phasing member 29. The studs 28 and the zones 33 are positioned. and dimensioned 5 so as to limit the compression of the elastic members 10a, 10b and avoid, when it comes to coil springs, that the turns of the springs are contiguous during their compression, both in the direction of rotation said direct direction only in the opposite direction of rotation, said retro direction. The forward direction corresponds to the case of operation in which torque 10 is transmitted from the torque input member to the torque output member. In certain phases of operation, for example when the user abruptly removes his foot from the accelerator, a resisting torque is transmitted from the torque output member to the torque input member, which may cause rotation of the phasing member 29 in the retro direction. The phasing member 29 further comprises a second element 29b comprising an annular portion 34 in the general shape of a bell from which lugs 35, here three in number, extend radially inwards. The annular portion 34 comprises in particular 20 radially extending annular zones 36, situated respectively at the inner and outer periphery, axially offset relative to each other and connected by an annular connection zone 38 and curved profile. The tabs 35 thus extend from the radially outer zone 37.
    [0008] Each lug 35 of the second element 29b is fastened to one of the lugs 31 of the first element 29a of the phasing member 29, by means of flat connecting struts 39. The device further comprises pendulum masses 40 movably mounted at the radially outer periphery of an annular support 41, the radially inner periphery of said support 41 being rotatably coupled with the tabs 31 of the first member 29a and with the legs 3034 of the second member 29b of the member by means of the spacers 39. The pendulum masses 40 are movably mounted on the support 41 via spacers 42 and rollers (not visible, as is known per se, these masses 40 being intended to improve the filtration of vibrations and rotational acyclisms Furthermore, as best seen in Figure 4, the central hub 8 comprises an annular housing 43 (Figures 4 and 6). edge on the side of the guide ring 7b.
    [0009] In this housing 43 is mounted an assembly comprising two auxiliary guide washers 44, disposed on either side of an auxiliary web 45. The two auxiliary guide washers 44 are connected to one another by spacers cylinders 46 riveted, here four in number, said spacers 46 having ends forming cylindrical studs 47, engaged in oblong openings 48 in the form of a circular arc, formed in the inner zone 36 of the second element 29b of the Phasing member 29. The auxiliary guide washers 44 can therefore pivot relative to the phasing member 29, in an angular range (angular or circumferential clearance) of between 1 and 10 °, for example. In addition, the auxiliary web 45 is rotatable in a given angular range relative to the auxiliary guide washers 44. The auxiliary web 45 comprises an annular portion 49 from which pads 50 of semicircular section, here in number of four, extend radially outward (Figure 6). The pads 49 are engaged in notches 51 of complementary shape of the inner hub 8, so as to couple in rotation said hub 8 and the auxiliary web 45. The auxiliary web 45 further comprises oblong holes in an arc allowing the passage of spacers 46 and the angular displacement of said spacers 46 relative to the auxiliary web 45.
    [0010] The auxiliary web 45 and the auxiliary guide washers 44 further include windows 52 in which third resilient members 10c are pre-stressed. The third elastic members 10c are in the form of compression-wound helical springs and oppose the pivoting of the auxiliary web 45 with respect to the auxiliary guide washers 44. In operation, the guide washers 7a, 7b and the hub 6 rotate relatively with respect to the web 24 and the hub 8 (in the forward direction or in the retro direction), so as to cause the rotation of an angle α of the phasing member 29 with respect to the guide washers 7a, 7b. As long as this angle α is less than the angular clearance j, i.e. at an angle α1, then only the first and second elastic members 10a and 10b are active, i.e., act at the angle α. against rotation of the torque input member (washers 7a, 7b and hub 6) relative to the torque output member (web 24 and hub 8). Conversely, when the set of the game j is caught up, that is to say when the angle a is greater than or equal to ai, then the studs 47 bear on the ends of the arc openings of circle 48 of the element 29b of the phasing member 29 and the third elastic members 10c are then compressed so as to act in parallel with the second elastic members 10b. It can thus be seen in the diagram of FIG. 9 that the curve illustrating the torque M transmitted through the device as a function of the angular offset a, comprises a first linear portion of slope Ka (for the small values of the angular offset a, c ' that is, for a less than a1) and a second linear portion of greater kb slope (for the high values of the angular offset a, that is, for a greater than ai). Ka and Kb are the angular stiffness of the device, respectively at the beginning (a <a1) and at the end of the angular stroke (a ai). If K1 defines the cumulative stiffnesses of the first springs 10a of each pair, by K2 the cumulative stiffness of the second springs 10b of each pair and by K3 the cumulative stiffness of the third springs 10c, then Ka = (K1.K2 ) / (K1 + K2) and Kb = [(K2 + K3) .K1] / [K1 + K2 + K3]. Such a device thus allows the damping and the transmission of very large torques, while having a relatively small axial and radial space and ensuring an effective filtration of vibrations and rotational acyclisms. The position a = 0 is defined by the rest position of the device in which no torque is transmitted through said device.
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. Torque transmission device for a motor vehicle, comprising a torque input member (6, 7), a torque output member (24, 8), at least a first elastic member (10a) and at least a second elastic member (10b), arranged in series via a phasing member (29), so that the first and second elastic members (10a, 10b) deform in phase with each other , the phasing member (29) being movable relative to the torque input member (6, 7) and with respect to the torque output member (24, 8), the first elastic member (10a ) being mounted between the torque input member (6, 7) and the phasing member (29) and being adapted to act against the rotation of the torque input member (6, 7) relative to the phasing member (29), the second elastic member (10b) being mounted between the phasing member (29) and the torque output member (24, 8) and being adapted to r acting against rotation of the torque output member (24, 8) relative to the phasing member (24), on a first angular range, characterized in that it comprises at least one third elastic member (10c) mounted with a circumferential clearance between the phasing member (29) and the torque output member (24, 8), in parallel with the second elastic member (10b) and adapted to act on the against the rotation of the phasing member (29) relative to the torque output member (24, 8) over a second angular range, less than the first angular range.
    [0002]
    2. Device according to claim 1, characterized in that it comprises two guide washers (7a, 7b) located axially on either side of an annular web (24), the guide washers (7a, 7b). belonging to the torque input element, the annular web (24) belonging to the torque output element, or vice versa.
    [0003]
    3. Device according to claim 1 or 2, characterized in that the annular web (24) comprises an annular portion (25) from which 3034481 14 tabs (26) extend radially outwardly, the first and second elastic members (10a, 10b) being circumferentially mounted between said tabs (26) of the web (24).
    [0004]
    4. Device according to claim 1 or 2, characterized in that it comprises an auxiliary annular web (45) rotatably coupled to the torque output member (24, 8), and two auxiliary guide washers (44). ), mounted on either side of the auxiliary web (45) and pivotable relative to said auxiliary web (45), the auxiliary guide washers (44) being mounted with a circumferential clearance with respect to the web member (45). phasing (29), the third elastic member (10c) being circumferentially mounted between the auxiliary web (45) and the auxiliary guide washers (44).
    [0005]
    Device according to claim 4, characterized in that the torque output element (24, 8) or the torque input element (6, 7) comprises an internal hub (8) intended to be coupled to an input shaft (2) of a gearbox and having an annular housing (43) in which are housed, at least in part, the auxiliary guide washers (44), the auxiliary web (45) and or the third elastic member (10c).
    [0006]
    6. Device according to claim 5, characterized in that the auxiliary guide washers (44) are coupled to one another by means of at least one fastener (46), said guide washers auxiliaries (44) having at least one stud (47) extending in at least one arcuate oblong opening (48) formed in the phasing member (29), or vice versa, so as to allow a Angular displacement of the phasing member (29) relative to the auxiliary guide washers (44), said deflection being limited by support of said stud (47) on the circumferential ends of the oblong opening (48).
    [0007]
    7. Device according to one of claims 4 to 6, characterized in that the auxiliary annular web (45) comprises an annular portion (49) from which at least one stud (50) protrudes radially towards the end of the chamber. outside, said stud (50) being engaged in a housing or a notch (51) complementary shape of the hub (8) or the torque output member (8, 24).
    [0008]
    8. Device according to one of claims 1 to 7, characterized in that the phasing member (29) comprises at least a first element (29a) comprising an annular portion (30) from which at least one leg (31) extends radially inward, the first and second elastic members (10a, 10b) bearing circumferentially on either side of said tab (31) of the phasing member (29). 10
    [0009]
    9. Device according to claim 8, characterized in that the phasing member (29) comprises at least one second element (29a) having an annular portion (34) from which at least one leg (35) extends radially outwardly, the first and second members (29a, 29b) of the phasing member (29) being rotatably coupled via at least one spacer (39), the third elastic member (10c ) being mounted with circumferential clearance between the second member (29b) of the phasing member (29) and the torque output member (24, 8).
    [0010]
    10. Hydrodynamic torque converter for a motor vehicle, characterized in that it comprises at least one device according to one of claims 1 to 9.
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    同族专利:
    公开号 | 公开日
    FR3034481B1|2019-11-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB2206950A|1987-07-11|1989-01-18|Daimler Benz Ag|Divided flywheel|
    US20090247307A1|2008-03-31|2009-10-01|Aisin Aw Co., Ltd|Damper device|
    EP2672139A2|2012-06-05|2013-12-11|ZF Friedrichshafen AG|Torsion oscillation attenuation assembly, in particular in a clutch disc|FR3060687A1|2016-12-16|2018-06-22|Valeo Embrayages|A PHASING MEMBER TORQUE TRANSMISSION DEVICE WITH STOPS|
    WO2019058057A1|2017-09-22|2019-03-28|Valeo Embrayages|Torsional vibration damper with a main damper and an additional damper|
    FR3071571A1|2017-09-22|2019-03-29|Valeo Embrayages|MAIN SHOCK ABSORBER TORSION DAMPING DEVICE AND ADDITIONAL SHOCK ABSORBER|
    FR3089584A1|2018-12-10|2020-06-12|Valeo Embrayages|Torsion damping device for a motor vehicle|
    法律状态:
    2016-03-31| PLFP| Fee payment|Year of fee payment: 2 |
    2016-10-07| PLSC| Search report ready|Effective date: 20161007 |
    2017-03-31| PLFP| Fee payment|Year of fee payment: 3 |
    2018-03-29| PLFP| Fee payment|Year of fee payment: 4 |
    2019-03-29| PLFP| Fee payment|Year of fee payment: 5 |
    2020-03-31| PLFP| Fee payment|Year of fee payment: 6 |
    2021-03-30| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1552657|2015-03-30|
    FR1552657A|FR3034481B1|2015-03-30|2015-03-30|TORQUE TRANSMISSION DEVICE FOR A MOTOR VEHICLE|FR1552657A| FR3034481B1|2015-03-30|2015-03-30|TORQUE TRANSMISSION DEVICE FOR A MOTOR VEHICLE|
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