WO2014132906A1 - ダイナミックダンパ装置 - Google Patents
ダイナミックダンパ装置 Download PDFInfo
- Publication number
- WO2014132906A1 WO2014132906A1 PCT/JP2014/054271 JP2014054271W WO2014132906A1 WO 2014132906 A1 WO2014132906 A1 WO 2014132906A1 JP 2014054271 W JP2014054271 W JP 2014054271W WO 2014132906 A1 WO2014132906 A1 WO 2014132906A1
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- WIPO (PCT)
- Prior art keywords
- inertia ring
- dynamic damper
- slider
- hysteresis torque
- damper device
- Prior art date
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- 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
- F16H—GEARING
- F16H45/00—Combinations of fluid gearings for conveying rotary motion with couplings or clutches
- F16H45/02—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type
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- 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
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- 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
- F16F15/14—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers
- F16F15/1407—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers the rotation being limited with respect to the driving means
- F16F15/1414—Masses driven by elastic elements
- F16F15/1421—Metallic springs, e.g. coil or spiral springs
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- 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
- F16H—GEARING
- F16H45/00—Combinations of fluid gearings for conveying rotary motion with couplings or clutches
- F16H45/02—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type
- F16H2045/0205—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type two chamber system, i.e. without a separated, closed chamber specially adapted for actuating a lock-up clutch
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- 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
- F16H—GEARING
- F16H45/00—Combinations of fluid gearings for conveying rotary motion with couplings or clutches
- F16H45/02—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type
- F16H2045/0221—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type with damping means
- F16H2045/0226—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type with damping means comprising two or more vibration dampers
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- 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
- F16H—GEARING
- F16H45/00—Combinations of fluid gearings for conveying rotary motion with couplings or clutches
- F16H45/02—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type
- F16H2045/0273—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type characterised by the type of the friction surface of the lock-up clutch
- F16H2045/0294—Single disk type lock-up clutch, i.e. using a single disc engaged between friction members
Definitions
- the present invention relates to a dynamic damper device, and more particularly to a dynamic damper device provided on an output side member of a torque converter.
- the torque converter is equipped with a lock-up device to reduce fuel consumption.
- the lockup device is disposed between the turbine and the front cover, and mechanically connects the front cover and the turbine to directly transmit torque between the two.
- the lockup device generally has a piston and a damper mechanism.
- the piston is pressed against the front cover by the action of hydraulic pressure, and torque is transmitted from the front cover.
- the damper mechanism also has a plurality of torsion springs, and the plurality of torsion springs elastically connect the piston and the output-side member connected to the turbine. In such a lockup device, the torque transmitted to the piston is transmitted to the output side member via a plurality of torsion springs and further transmitted to the turbine.
- Patent Document 1 discloses a lock-up device that suppresses engine rotation fluctuations by attaching an inertia member to an output-side member.
- an inertia member is attached to an output member fixed to a turbine so as to be relatively rotatable.
- a torsion spring as an elastic member is provided between the output member and the inertia member.
- a torsion spring constituting a dynamic damper device is disposed between a piston and a turbine, and as described above, an annular plate member is elastically attached to an output member via the torsion spring. Connected. And the inertia ring is being fixed to the outer peripheral part of the cyclic
- An object of the present invention is to provide a dynamic damper device that has a small occupied space in the axial direction and can be reduced in weight.
- a dynamic damper device is a device provided on an output side member of a torque converter, and includes a rotating member, an inertia ring, and a plurality of elastic members.
- the rotating member is fixed to the output side member and rotates.
- the inertia ring has an accommodating portion along the circumferential direction, and is arranged to be rotatable relative to the rotating member.
- the plurality of elastic members are disposed in the housing portion and elastically connect the rotating member and the inertia ring in the rotation direction.
- the rotating member and the inertia ring are elastically connected by a plurality of elastic members, and the rotational speed fluctuation of the rotating member is suppressed by the inertia ring.
- the inertia ring has a housing portion, and a plurality of elastic members are arranged in the housing portion.
- the occupied space of the dynamic damper device can be reduced as compared with the conventional dynamic damper device.
- the torsion spring can function as inertia, it is possible to effectively suppress fluctuations in rotational speed while suppressing an increase in the weight of the entire torque converter.
- the dynamic damper device is disposed in the inertia housing, and generates a first hysteresis torque in a low rotation speed range, and generates a second hysteresis torque larger than the first hysteresis torque in a medium rotation speed range to a high rotation speed range. It is preferable to have a hysteresis torque generating mechanism.
- lock-up rotational speed the rotational speed at which the front cover and the turbine are coupled
- the engine speed fluctuation is large in the region where the engine speed is low. Therefore, if the lockup speed is set to a low speed, the output speed fluctuation becomes larger. Therefore, by using a lock-up device having an inertia member as shown in Patent Document 1, even if the lock-up rotation speed is about 1200 rpm, for example, rotation fluctuation can be suppressed.
- the frictional resistance between the rotating member and the inertia member that is, the hysteresis torque is increased as the rotational speed increases. Therefore, the rotational speed fluctuation on the output side can be suppressed in a wide rotational speed range. Therefore, by attaching this dynamic damper device to the lockup device, even when the lockup rotation speed is set to a low rotation speed, fluctuations in the rotation speed can be suppressed in a wide rotation speed range.
- the hysteresis torque generating mechanism gradually decreases the relative twist angle between the rotating member and the inertia ring by increasing the friction between the rotating member and the inertia ring.
- the hysteresis torque generating mechanism includes a slider and a contact member.
- the slider rotates with the inertia ring, is movable in the radial direction with respect to the inertia ring, and has a sliding surface extending in the rotation direction.
- the abutting member preferably rotates together with the rotating member, and its movement is restricted as follows.
- the relative torsion angle range with the inertia ring is restricted to the first angle range by contacting the sliding surface of the slider.
- the relative torsion angle range with the inertia ring is restricted to the second angle range narrower than the first angle range by contacting the sliding surface of the slider.
- a lock portion into which the contact member is fitted is formed at the central portion in the rotational direction of the sliding surface of the slider.
- the inertia accommodating portion is formed open on one side in the axial direction.
- the inner periphery of the rotating member is fixed to the torque converter turbine. Moreover, it is preferable to further include a side plate that is fixed to the intermediate portion in the radial direction of the rotating member and rotatably supports the inertia member.
- the space occupied in the axial direction of the dynamic damper device can be reduced, and the increase in the weight of the entire torque converter can be suppressed, and the rotational speed fluctuation can be effectively suppressed.
- FIG. 3 is a characteristic diagram of engine speed and rotational speed fluctuation.
- FIG. 1 shows a torque converter according to an embodiment of the present invention.
- An engine is arranged on the left side of FIG. 1, and a transmission is arranged on the right side of FIG.
- the OO line shown in FIG. 1 is the rotational axis of the torque converter.
- the torque converter 1 is a device for transmitting power from a crankshaft of an engine to an input shaft of a transmission, and mainly includes a front cover 2 to which power is input, an impeller 3, a turbine 4, a stator 5, A lockup device 6 and a dynamic damper device 7 are provided.
- the outer periphery of the front cover 2 and the impeller 3 are welded to each other, and a fluid chamber is formed by the front cover 2 and the impeller 3.
- the turbine 4 is disposed so as to face the impeller 3 in the fluid chamber.
- the turbine 4 includes a turbine shell 8, a plurality of turbine blades 9 fixed inside the turbine shell 8, and a turbine hub 10 fixed to the inner peripheral portion of the turbine shell 8.
- the turbine hub 10 has a cylindrical portion 10a extending in the axial direction and a disk-shaped flange 10b extending radially outward from the cylindrical portion 10a. And the inner peripheral part of the turbine shell 8 is being fixed to the outer peripheral part of the flange 10b with the rivet 11.
- a spline hole 10 c is formed in the inner peripheral portion of the turbine hub 10. And the input shaft of the transmission which is not illustrated is connected with the spline hole 10c.
- the stator 5 is a mechanism for adjusting the flow of hydraulic oil from the turbine 4 to the impeller 3, and is disposed between the inner peripheral portion of the impeller 3 and the inner peripheral portion of the turbine 4.
- the lockup device 6 is disposed between the front cover 2 and the turbine 4.
- the lockup device 6 includes a piston 13 and a damper mechanism 14.
- the piston 13 is an annular disk member, and includes a disk part 13a, an inner peripheral cylindrical part 13b, and an outer peripheral cylindrical part 13c.
- the disc portion 13a is disposed to face the front cover 2, and a friction member 13d that is in frictional contact with the front cover 2 is provided on the outer peripheral portion.
- the inner peripheral cylindrical portion 13b is provided at the inner peripheral end of the disc portion 13a so as to protrude toward the transmission side.
- the inner peripheral cylindrical portion 13b is supported on the outer peripheral surface of the cylindrical portion 10a of the turbine hub 10 so as to be movable in the axial direction and relatively rotatable.
- the outer peripheral cylindrical portion 13c is provided at the outer peripheral end of the disc portion 13a so as to protrude toward the transmission side, and a plurality of grooves 13e having a predetermined length are formed in the axial direction.
- FIG. 2 shows the damper mechanism 14 extracted.
- the damper mechanism 14 has a pair of retaining plates 15 and 16, an output flange 17, and a plurality of outer and inner torsion springs 18 and 19, respectively.
- the pair of retaining plates 15 and 16 are disc members formed in an annular shape, and are arranged to face each other with an interval in the axial direction. Both the retaining plates 15 and 16 have the same shape, and have a plurality of spring storage portions 15a and 16a on the outer peripheral portion and a plurality of spring storage portions 15b and 16b on the inner peripheral portion. The outer peripheral portions of both plates 15 and 16 are fixed by rivets 20. Further, a plurality of teeth 15 c and 16 c are formed at the outer peripheral ends of both plates 15 and 16, and these teeth 15 c and 16 c are engaged with the groove 13 e of the piston 13. As a result, the damper mechanism 14 is not rotatable relative to the piston 13 and is movable in the axial direction.
- the output flange 17 is arranged so as to be sandwiched between a pair of retaining plates 15 and 16.
- a spring accommodating notch 17 a is formed in the outer peripheral portion of the output flange 17, and a spring accommodating opening 17 b is formed in the inner peripheral portion of the output flange 17.
- An inner peripheral end 17 c of the output flange 17 is fixed to the flange 10 b of the turbine hub 10 by a rivet 11.
- the outer peripheral side torsion spring 18 is disposed in a notch 17a on the outer peripheral side of the output flange 17, and is supported by outer peripheral side spring storage portions 15a and 16a of a pair of retaining plates 15 and 16.
- the inner peripheral torsion spring 19 is disposed in the inner peripheral opening 17 b of the output flange 17 and is supported by the inner peripheral spring accommodating portions 15 b and 16 b of the pair of retaining plates 15 and 16.
- the dynamic damper device 7 includes a damper plate 25 (rotating member), an inertia ring 26, a plurality of torsion springs 27, a plurality of sliders 28, a side plate 29, and a plurality of And a spring 32.
- FIG. 3 is a front view of the dynamic damper device 7.
- a hysteresis torque generating mechanism 33 is configured by a part of the damper plate 25, the plurality of sliders 28, and the plurality of springs 32.
- FIG. 4 shows a partial front view of the damper plate 25, and FIGS. 5 (a) to 5 (c) show cross sections of the lines OA, OB and OC in FIG.
- the damper plate 25 is a disc member formed in an annular shape, and its inner peripheral end is welded to the turbine shell 8 as shown in FIG. Further, a plurality of rivet holes 25a are formed in the radially intermediate portion, and a plurality of claws 25b (contact members) and engaging portions 25c are formed at the outer peripheral ends, respectively.
- the claw 25b is formed by bending the outer peripheral end to the transmission side.
- the engaging portion 25c is formed to be biased toward the transmission side from other portions in the axial direction.
- the claws 25b and the engaging portions 25c are alternately arranged in the circumferential direction.
- FIG. 6 shows a partial front view of the inertia ring 26, and FIGS. 7A to 7C show cross sections taken along lines OA, OB and OC in FIG.
- the inertia ring 26 is disposed so as to be rotatable relative to the damper plate 25.
- the inertia ring 26 is an annular member, and has a plurality of spring storage portions (an example of a storage portion) 26a and a slider storage portion (an example of a storage portion) 26b at predetermined intervals in the circumferential direction.
- Each of the storage portions 26a and 26b is a recess formed so as to open toward the axial engine side and to be recessed toward the transmission side.
- Each of the plurality of slider storage portions 26b is disposed so as to be sandwiched between two spring storage portions 26a in the circumferential direction.
- a plurality of protruding portions 26c are formed at the outer peripheral end portion of the inertia ring 26 so as to extend between one slider storage portion 26b and a part of two adjacent spring storage portions 26a.
- the protruding portion 26c protrudes toward the engine side in the axial direction.
- a restricting portion 26d is formed at the inner peripheral end portion of the inertia ring 26 so as to protrude toward the inner peripheral side.
- the side plate 29 abuts against the restricting portion 26d from the transmission side, thereby restricting the movement of the inertia ring 26 in the axial direction.
- the side plate 29 has an inner peripheral portion fixed to the damper plate 25 by a rivet 30.
- the plurality of torsion springs 27 are accommodated in the spring accommodating portion 26a of the inertia ring 26 as shown in FIG. One end of the torsion spring 27 is engaged with both ends of one engagement portion 25c of the damper plate 25. Thereby, the damper plate 25 and the inertia ring 26 are elastically connected in the rotational direction by the torsion spring 27.
- the slider 28 is a member that extends long in the circumferential direction, and is housed in the slider housing portion 26 b of the inertia ring 26 so as to be movable in the radial direction.
- FIG. 8 shows the slider storage portion 26b and the slider 28 of the inertia ring 26 extracted.
- the slider storage portion 26b has spring receiving portions 26e at both ends in the circumferential direction.
- the walls at both ends in the circumferential direction of the slider storage portion 26b function as guide portions 26f.
- the slider 28 has spring accommodating portions 28a formed radially inward at both ends in the circumferential direction.
- Each spring accommodating portion 28a accommodates a spring 32 that urges the slider 28 toward the inner peripheral side.
- Both ends of the slider 28 in the longitudinal direction are slidably in contact with the guide portion 26f of the slider storage portion 26b.
- the outer peripheral surface 28b of the slider 28 is curved so as to be recessed inward.
- claw 25b of the damper plate 25 fits is formed in the center part in the circumferential direction of this outer peripheral surface 28b.
- the hysteresis torque generating mechanism 33 that generates variable hysteresis torque between the damper plate 25 and the inertia ring 26 is configured by the claws 25b of the damper plate 25, the slider 28, and the spring 32.
- the inertia ring 26, the torsion spring 27, the slider 28, and the spring 32 function as inertia members.
- the lockup device 6 When the rotational speed of the input shaft reaches a certain rotational speed, the lockup device 6 is turned on, and the power is mechanically transmitted from the front cover 2 to the turbine hub 10 via the lockup device 6. Specifically, when the piston 13 moves to the engine side due to a change in hydraulic pressure and the friction material 13d of the piston 13 is pressed against the front cover 2, the piston 13 rotates integrally with the front cover 2. Since the pair of retaining plates 15, 16 are engaged with the piston 13, the power transmitted to the piston 13 is transmitted to the pair of retaining plates 15, 16, the outer peripheral side and the inner peripheral side torsion springs 18. , 19 to the output flange 17 and further to the turbine hub 10.
- the difference between the characteristics E2 and E3 in the low speed range is due to the magnitude of the hysteresis torque in the hysteresis torque generating mechanism 33. That is, the characteristic E2 is when the hysteresis torque is relatively large, and the characteristic E3 is when the hysteresis torque is relatively small.
- the rotational speed fluctuation of the turbine is small when the engine speed is lower than 1200 rpm, becomes maximum near 1500 rpm, and gradually decreases when the engine speed is higher.
- the rotational speed fluctuation of the turbine shows a minimum value smaller than the characteristic E2 when the engine speed exceeds 1200 rpm, and becomes the maximum exceeding the characteristic E2 near 1600 rpm.
- the rotational speed fluctuation of the turbine is smaller when the hysteresis torque is smaller in the engine speed range where the engine speed is low, and is smaller when the hysteresis torque is greater in the intermediate speed range. Further, in the high rotation speed range, the influence of the hysteresis torque on the turbine rotation speed fluctuation is small.
- the hysteresis torque generating mechanism 33 is configured such that the hysteresis torque changes depending on the rotation speed range. Specifically, the hysteresis torque generated by the hysteresis torque generating mechanism 33 is small in the region where the engine speed is low, and gradually increases in the middle and high speed regions.
- the centrifugal force acting on the slider 28 is relatively small in the low speed range. For this reason, as shown in ⁇ normal time> of FIG. 10A, the slider 28 is urged toward the inner peripheral side by the urging force of the spring 32. In such a state, when the dynamic damper device 7 operates and the damper plate 25 and the inertia ring 26 rotate relative to each other, the claws 25b of the damper plate 25 relatively move on the outer peripheral side of the outer peripheral surface 28b of the slider 28. .
- the angular range (torsion angle) of the relative rotation of the damper plate 25 is regulated by the claw 25b coming into contact with the outer peripheral surface 28b of the slider 28. And in the low rotation speed range shown to Fig.10 (a), a twist angle becomes the largest (theta) 1. Further, in the range of the torsion angle ⁇ ⁇ 1, the claw 25b smoothly moves outward from the slider 28, so the hysteresis torque in this case is small.
- the claw 25b strongly contacts the outer peripheral surface 28b of the slider 28, so that a hysteresis torque larger than the hysteresis torque in the low rotational speed region is generated.
- the slider 28 moves further to the outer peripheral side against the biasing force of the spring 32, and is in a state as shown in ⁇ at the time of locking> in FIG.
- the claw 25 b is fitted into the lock portion 28 c of the outer peripheral surface 28 b of the slider 28. That is, relative rotation between the claw 25b (that is, the damper plate 25) and the inertia ring 26 is prohibited, and the claw 25b is locked. For this reason, in the state shown in FIG.10 (c), the hysteresis torque in the dynamic damper apparatus 7 becomes infinite.
- the characteristic of the turbine rotational speed fluctuation becomes the characteristic E3 in the low rotational speed region and the characteristic E2 in the middle rotational speed region to the high rotational speed region as shown in FIG. For this reason, the turbine rotational speed fluctuation can be kept small in the entire engine speed range.
- the dynamic damper device occupies particularly in the axial direction. Space can be made compact. And these members can be made to function as inertia, and the weight of the whole torque converter can be made light.
- the hysteresis torque of the dynamic damper device 7 is made infinite by fitting the claw 25b into the lock portion 28c formed on the slider 28. For this reason, a large hysteresis torque can be generated with a simple mechanism.
- the torsion springs 18 and 19 are provided on the inner and outer circumferences, but the torsion springs may be provided only on the outer circumference side. In this case, the axial dimension can be further shortened.
- the outer peripheral surface 28b of the slider 28 is curved inward in the radial direction in the above embodiment, the outer peripheral surface may be a flat surface.
- the occupied space in the axial direction can be reduced, and the increase in the weight of the entire torque converter can be suppressed to effectively suppress the rotational speed fluctuation.
- Dynamic damper device 10 Turbine hub 17 Output flange 25 Damper plate 26 Inertia ring 26a Spring storage part (an example of a storage part) 26b Slider storage part (an example of a storage part) 27 Torsion spring 28 Slider 28c Lock part
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Abstract
Description
[全体構成]
図1に、本発明の一実施形態によるトルクコンバータを示す。図1の左側にはエンジンが配置され、図1の右側にはトランスミッションが配置されている。図1に示すO-O線はトルクコンバータの回転軸線である。
ロックアップ装置6はフロントカバー2とタービン4との間に配置されている。ロックアップ装置6は、ピストン13と、ダンパ機構14と、を有している。
ピストン13は、環状の円板部材であり、円板部13aと、内周筒状部13bと、外周筒状部13cと、を有している。円板部13aは、フロントカバー2に対向して配置されており、外周部にフロントカバー2と摩擦接触する摩擦部材13dが設けられている。内周筒状部13bは、円板部13aの内周端にトランスミッション側に突出して設けられている。また、内周筒状部13bは、タービンハブ10の筒状部10aの外周面に、軸方向に移動自在に、かつ相対回転自在に支持されている。外周筒状部13cは、円板部13aの外周端にトランスミッション側に突出して設けられており、軸方向に所定の長さを有する複数の溝13eが形成されている。
図2にダンパ機構14を抽出して示している。ダンパ機構14は、1対のリティニングプレート15,16と、出力フランジ17と、それぞれ複数の外周側及び内周側のトーションスプリング18,19と、を有している。
ダイナミックダンパ装置7は、図1及び図3に示すように、ダンパプレート25(回転部材)と、イナーシャリング26と、複数のトーションスプリング27と、複数のスライダ28と、サイドプレート29と、複数のスプリング32と、を有している。なお、図3はダイナミックダンパ装置7の正面図である。そして、詳細は後述するが、ダンパプレート25の一部と、複数のスライダ28と、複数のスプリング32と、によってヒステリシストルク発生機構33が構成されている。
まず、トルクコンバータ本体の動作について簡単に説明する。フロントカバー2及びインペラ3が回転している状態では、インペラ3からタービン4へ作動油が流れ、作動油を介してインペラ3からタービン4へ動力が伝達される。タービン4に伝達された動力はタービンハブ10を介してトランスミッションの入力シャフト(図示せず)に伝達される。
ダイナミックダンパ装置7では、タービンハブ10に回転が伝達される。このとき、タービンシェル8にはダンパプレート25及びトーションスプリング27介してイナーシャリング26が設けられているので、エンジンの回転変動を効果的に抑制することができる。以下。この点について詳細に説明する。
図10を用いて、回転数域によってヒステリシストルクが変化する動作について説明する。
(1)イナーシャリング26の内部に、可変のヒステリシストルクを発生するための機構33を構成するトーションスプリング27、スライダ28、スプリング32を収容しているので、特に、軸方向におけるダイナミックダンパ装置の占有スペースをコンパクトにすることができる。そして、これらの部材を慣性(イナーシャ)として機能させることができ、トルクコンバータ全体の重量を軽くすることができる。
本発明は以上のような実施形態に限定されるものではなく、本発明の範囲を逸脱することなく種々の変形又は修正が可能である。
10 タービンハブ
17出力フランジ
25 ダンパプレート
26 イナーシャリング
26a スプリング収納部(収容部の一例)
26b スライダ収納部(収容部の一例)
27 トーションスプリング
28 スライダ
28c ロック部
Claims (7)
- トルクコンバータの出力側部材に設けられたダイナミックダンパ装置であって、
前記出力側部材に固定されて回転する回転部材と、
円周方向に沿って収容部を有し、前記回転部材と相対回転自在に配置されたイナーシャリングと、
前記収容部に配置され、前記回転部材と前記イナーシャ部材とを回転方向に弾性的に連結するための複数の弾性部材と、
を備えたダイナミックダンパ装置。 - 前記イナーシャリングの収容部に配置され、低回転数域では第1ヒステリシストルクを発生し、中回転数域から高回転数域では前記第1ヒステリシストルクよりも大きな第2ヒステリシストルクを発生するヒステリシストルク発生機構をさらに備えた、請求項1に記載のダイナミックダンパ装置。
- 前記ヒステリシストルク発生機構は、回転数の増加に伴って前記回転部材と前記イナーシャリングとの間の摩擦を増大させることによって両者の相対捩じり角度を徐々に減少させる、請求項2に記載のダイナミックダンパ装置。
- 前記ヒステリシストルク発生機構は、
前記イナーシャリングとともに回転し、前記イナーシャリングに対して径方向に移動自在であり、回転方向に延びる摺動面を有するスライダと、
前記回転部材とともに回転し、低回転数域では前記スライダの摺動面に当接することによって前記イナーシャリングとの相対捩じり角度範囲が第1角度範囲に規制され、前記低回転数域より回転数が高い中回転数域では前記スライダの摺動面に当接することによって前記イナーシャリングとの相対捩じり角度範囲が前記第1の角度範囲より狭い第2角度範囲に規制され、前記中回転数域より回転数が高い高回転数域では前記スライダの摺動面に当接することによって前記イナーシャリングとの相対捩じりが禁止される、当接部材と、
を有する請求項3に記載のダイナミックダンパ装置。 - 前記スライダの摺動面の回転方向の中央部には、前記当接部材が嵌り込むロック部が形成されている、請求項4に記載のダイナミックダンパ装置。
- 前記イナーシャリングの収容部は軸方向の一方側に開いて形成されている、請求項1から5のいずれかに記載のダイナミックダンパ装置。
- 前記回転部材は内周部が前記トルクコンバータのタービンに固定されており、
前記回転部材の径方向中間部に固定され、前記イナーシャリングを回転自在に支持するサイドプレートをさらに備えた、
請求項6に記載のダイナミックダンパ装置。
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