JP2008082556A - Torque fluctuation absorbing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the fall-off of a thrust lining due to centrifugal force. <P>SOLUTION: This torque fluctuation absorbing device comprises a hysteresis device 80 consisting of the thrust lining 81, a thrust plate 82 and a cone spring 83. On the friction face of a driving side rotating member which is subjected to friction with the thrust lining 81, a stepped portion 82b is provided for suppressing the movement of the thrust lining 81 to the radial outside. A point of force of applying the cone spring 83 to the thrust plate 82 is arranged on the side of the outer diameter beyond the center of the thrust lining 81 in the radial direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The invention of this application relates to a torque fluctuation absorbing device interposed in a drive system of an automobile or the like.

  A torque fluctuation absorbing device that is interposed between an output shaft of an automobile engine and an input shaft of a transmission and absorbs torque fluctuation is known. For example, as described in Japanese Patent Laid-Open No. 10-132028, A torque passing portion is provided on the driving side rotating member that rotates integrally with the engine, and a torque passing portion is also provided on the driven side rotating member that is arranged coaxially and rotatably with respect to the driving side rotating member. An elastic member such as a coil spring for transmitting torque is installed in the circumferential space between the delivery portions. One or more hysteresis devices that provide a predetermined frictional resistance torque are installed between the driving side rotating member and the driven side rotating member. Torsional characteristics (representing the relationship between the relative rotation angle of the driving side rotating member and the driven side rotating member and the torque) in a polygonal line in order to exhibit good torque fluctuation absorption performance from the low torque range to the high torque range The coil spring that transmits torque between the driving-side rotating member and the driven-side rotating member is less likely to come into contact with other members due to centrifugal force and be damaged due to wear. There is what was shown in FIG. 7 of Kaihei 10-1332028 gazette.

In this torque fluctuation absorber, a driving side rotating member that rotates integrally with the engine is provided with a cylindrical guide surface facing radially inward, and coaxially with the driving side rotating member on the inner diameter side of the guide surface and A space in the circumferential direction is formed between the outer periphery of the driven-side rotating member and the guide surface that are rotatably arranged, and the driving-side rotating member and the driven-side rotating member are each provided with a torque delivery portion that enters the space. In the circumferential space between the two torque delivery portions, two low spring load coil springs supported at both ends by spring sheets slidably guided by guide surfaces and springs of the coil springs The spring load larger than the load is also five high spring load coil springs in series in the circumferential direction and the low spring load coil springs are positioned at both circumferential ends of the circumferential space. It is installed so as to. A torsion exceeding a predetermined maximum torsion angle between the driving side rotating member and the driven side rotating member is caused between the torque passing part of the driving side rotating member and the torque passing part of the driven side rotating member. It is regulated by the occurrence of a contact relationship via the contact, and at the same time, the close contact of each coil spring is prevented.
JP 10-1332028 A

  The requirements for the torque fluctuation absorber include high durability, good torque absorption performance from low torque range to high torque range, stable torque absorption performance, low noise, small size, light weight and low cost.

The torque fluctuation absorbing device shown in FIG. 7 of the above publication discloses a torsional characteristic (a driving side rotating member and a driven side rotating member and a driven side rotating member) in order to exhibit a good torque fluctuation absorbing performance from a low torque range to a high torque range. Can be set in a polygonal line, and the coil spring that transmits torque between the driving side rotating member and the driven side rotating member is brought into contact with other members by centrifugal force. In order to reduce the possibility of damage due to wear, the drive-side rotating member that rotates integrally with the engine is provided with a guide surface that faces radially inward, and is arranged coaxially and freely with respect to the driving-side rotating member. A portion of the driven-side rotating member is disposed on the inner diameter side of the guide surface to form a circumferential space between the outer periphery and the guide surface, and the driving-side rotating member and the driven-side rotating member are within the space. Torque passing part to enter Two low spring load coils each provided and supported at both ends by a low friction resin spring seat slidably guided by a guide surface in the circumferential space between both torque transfer portions. The spring and five high spring load coil springs with a spring load larger than the spring load of this coil spring are arranged in series in the circumferential direction so that the low spring load coil springs are positioned at both circumferential ends of the circumferential space. is doing. A torsion exceeding a predetermined maximum torsion angle between the driving side rotating member and the driven side rotating member is caused between the torque passing part of the driving side rotating member and the torque passing part of the driven side rotating member. In addition, the contact relationship via the floating stopper member installed inside each coil spring is regulated, and the close contact of each coil spring is prevented.

  However, since the spring seat is made of resin and the resin has poor thermal conductivity, the heat generated by the friction between the guide surface and the spring seat is trapped in the spring seat, and wear of the friction portion with the guide surface of the spring seat proceeds. In addition to being fast, the strength of the spring seat is reduced and is easily damaged, which is not sufficient in terms of durability.

  In addition, since seven coil springs are in series and the length per one is long, the amount of outward protrusion in the radial direction due to centrifugal force increases, and the coil spring stress increases and is easily damaged. Since the spring comes into contact with the guide surface and the coil spring is worn out, or the surface roughness of the guide surface is deteriorated and wear of the spring seat is promoted, the durability is not sufficient. In order to avoid this, it is conceivable to increase the number of coil springs, eliminate the floating stopper member, and extend the boss part of the spring seat a little, but the boss part is between the outer periphery of the boss part and the coil spring. Since there is almost no gap over the entire length, the centrifugal force acting on the coil spring is loaded on the tip of the boss portion, resulting in damage to the spring seat.

  The torque fluctuation absorbing device described in the above publication is provided with two hysteresis mechanisms, one of which is a block that is movably inserted in the axial direction into a window formed in the part of the driven side rotating member. Thrust plate, a thrust plate that rotates integrally with the driving side rotating member but is movably connected in the axial direction, and sandwiches the thrust lining from both sides in the axial direction with the driving side rotating member, and the thrust plate Is provided with a cone spring that urges the thrust lining toward the thrust lining, and a stepped portion is provided on the friction surface of the driving side rotating member that rubs against the thrust lining to suppress the movement of the thrust lining radially outward. Place the thrust point on the thrust plate on the inner diameter side of the thrust lining center in the radial direction. That.

  However, since the position of the stepped portion that suppresses the outward movement of the thrust lining in the radial direction and the applied point of the cone spring are shifted in the radial direction, it is predicted that the thrust lining will fall over the stepped portion due to centrifugal force, In terms of durability, it is not enough.

  In the hysteresis device of the conventional torque fluctuation absorber, the cone spring is positioned in the radial direction on the inner peripheral side surface of the plurality of bent claw portions formed on the thrust plate and the outer peripheral surface of the cone spring. The cone spring position is decentered by the unavoidable gap between the outer surface of the cone spring and the cone spring, and an uneven load acts on the thrust lining, resulting in uneven wear of the thrust lining. It ’s not enough in terms of sex.

  Further, in the hysteresis device of the conventional torque fluctuation absorber, the thrust lining and the driven side rotating member are in direct contact with each other at the time of relative rotation between the driving side rotating member and the driven side rotating member. When a material having a high hardness is used as the material for improving the wear resistance, an irritating impact sound is generated, which is not sufficient in terms of noise.

  Furthermore, since the hysteresis mechanism of the conventional torque fluctuation absorbing device is a dry type, the frictional resistance torque changes with time, and it cannot be said that the torque fluctuation absorbing performance and durability are sufficient.

  Further, in the conventional torque fluctuation absorber, in order to reduce the size, weight, and cost, the driven side rotating member is composed of a driven disk that constitutes a part thereof and a flywheel that couples the driven disk with a number of bolts. The bolts are arranged at equal intervals in the circumferential direction, the heads of these bolts are arranged on the side opposite to the flywheel side, and a number of holes for tightening the bolts are provided on the driving side rotating member. Forming.

  However, dust and the like enter the inside through a large number of holes for tightening bolts to cause problems, and it cannot be said that the durability is sufficient. Further, since the bolt interval is set based on the high load portion, the number of bolts is increased, which is not sufficient in terms of weight reduction and cost reduction.

  Further, in the conventional torque fluctuation absorber, the drive side rotating member is configured by using the first drive plate and the second drive plate that are laser-welded to each other at the outer peripheral portion in order to reduce the size, weight, and cost. However, since the laser irradiation range is narrow, it is necessary to accurately aim at the joint surface, and it is easy to produce defective products, which is not sufficient in terms of cost reduction.

  Each of the first and second aspects of the present invention achieves the main object through further reducing the falling off and uneven wear of the thrust lining, and the third aspect of the present invention includes improving the centering positioning accuracy of the thrust plate. The main object is achieved, and the invention of claim 4 achieves the main object through reducing the contact noise between the thrust lining and the driven side rotating member, and each of the inventions of claim 5 and claim 6 includes hysteresis. The main object is achieved by reducing the change over time of the frictional resistance torque of the device.

  The invention according to claim 1 of the present application provides a driven-side rotating member provided with a torque delivery portion on a driving-side rotating member that rotates integrally with the engine, and arranged coaxially and rotatably with respect to the driving-side rotating member. In the torque fluctuation absorbing device in which an elastic member for providing torque transmission is provided in the circumferential space between the two torque delivery portions, the torque-side absorption member includes a drive-side rotation member and a driven-side rotation member. A hysteresis device that provides a predetermined friction torque between the block-shaped thrust lining that is inserted in a window portion formed in the portion of the driven-side rotating member so as to be axially movable, and the driving-side rotating member A thrust plate that rotates integrally but is movable in the axial direction and sandwiches the thrust lining from both sides in the axial direction with the drive-side rotating member; A step portion that includes a cone spring that urges a strut toward the thrust lining, and that suppresses movement of the thrust lining radially outward on a friction surface of the drive-side rotating member that rubs against the thrust lining. The torque fluctuation absorbing device is characterized in that an application point of the cone spring to the thrust plate is arranged on the outer diameter side of the center of the thrust lining in the radial direction.

  In this torque fluctuation absorbing device, the step portion that suppresses the outward movement of the thrust lining in the radial direction and the point where the cone spring is applied to the thrust plate are located on the outer diameter side of the center of the thrust lining in the radial direction. The thrust lining is reliably suppressed from overcoming the step by the centrifugal force, and the drop of the thrust lining is prevented.

  The invention according to claim 2 of this application is the torque fluctuation absorbing device according to claim 1, wherein the thrust surface frictioned with the thrust lining is also caused to move the thrust lining radially outward. The torque fluctuation absorbing device is characterized by providing a stepped portion to be suppressed, and stepped portions that suppress the outward movement of the thrust lining in the radial direction exist on both sides in the axial direction of the thrust lining. More reliably prevented.

  The invention according to claim 3 of the present application provides a driven-side rotating member that is provided with a torque delivery portion on a driving-side rotating member that rotates integrally with the engine, and that is disposed coaxially and rotatably with respect to the driving-side rotating member. In the torque fluctuation absorbing device in which an elastic member for providing torque transmission is provided in the circumferential space between the two torque delivery portions, the torque-side absorption member includes a drive-side rotation member and a driven-side rotation member. A hysteresis device that gives a predetermined friction resistance torque between the block-shaped thrust lining inserted in the window portion formed in the part of the driven-side rotating member so as to be movable in the axial direction, and the driving-side rotating member A thrust plate that is integrally connected to each other but is movable in the axial direction and sandwiches the thrust lining from both sides in the axial direction with the driving side rotation member. The thrust plate is configured by a cone spring that biases the thrust plate toward the thrust lining, and a plurality of notches are formed in one of the outer peripheral portion and the inner peripheral portion of the cone spring and are distributed in the circumferential direction. A plurality of bent claws that are respectively fitted to the thrust plate are formed on the thrust plate, and the cone spring is positioned in the radial direction by fitting the plurality of bent claws and the notch. Fluctuation absorber.

  In this torque fluctuation absorber, the cone spring is centered and positioned by fitting a plurality of notches formed in the circumferential direction of the cone spring and the corresponding bending claw portions of the thrust plate. The gap between the notch and the bent claw in the radial direction is not involved in the centering of the cone spring, and the cone spring is centered by the contact between the notched and the bent claw in the circumferential direction. Can be accurately centered, the effect of uneven load on the thrust lining is avoided, and uneven wear of the thrust lining is prevented.

  The invention according to claim 4 of the present application provides a driven-side rotating member provided with a torque delivery portion on a driving-side rotating member that rotates integrally with the engine, and arranged coaxially and rotatably with respect to the driving-side rotating member. In the torque fluctuation absorbing device in which an elastic member for providing torque transmission is provided in the circumferential space between the two torque delivery portions, the torque-side absorption member includes a drive-side rotation member and a driven-side rotation member. A hysteresis device that gives a predetermined friction resistance torque between the block-shaped thrust lining inserted in the window portion formed in the part of the driven-side rotating member so as to be movable in the axial direction, and the driving-side rotating member A thrust plate that is integrally connected to each other but is movable in the axial direction and sandwiches the thrust lining from both sides in the axial direction with the driving side rotation member. A rubber member configured to prevent a direct contact between the thrust lining and the driven rotating member at both ends in the circumferential direction of the window portion is configured by a cone spring that biases the thrust plate toward the thrust lining. A torque fluctuation absorbing device characterized by being attached.

  In this torque fluctuation absorber, since the thrust lining contacts the rubber member during relative rotation of the driving side rotating member and the driven side rotating member, even if the thrust lining is made of a high hardness material, an irritating collision sound is not generated. Does not occur.

  The invention according to claim 5 of the present application provides a driven-side rotating member provided with a torque delivery portion on a driving-side rotating member that rotates integrally with the engine, and arranged coaxially and rotatably with respect to the driving-side rotating member. In the torque fluctuation absorbing device in which an elastic member for providing torque transmission is provided in the circumferential space between the two torque delivery portions, the torque-side absorption member includes a drive-side rotation member and a driven-side rotation member. One or more hysteresis devices that provide a predetermined frictional resistance torque are provided between them, and grease is applied to the friction portion of the hysteresis device.

  In this torque fluctuation absorber, since the grease is applied to the friction part of the hysteresis device, the change with time of the friction torque is reduced by the lubricating action of the grease.

  The invention of claim 6 of this application is the torque fluctuation absorber according to claim 5, wherein the friction part of the hysteresis device is provided with a recess for collecting grease, The lubricating effect of grease is maintained for a long time.

  1 to 5 show a first embodiment of a torque fluctuation absorber according to the invention of this application. FIG. 1 is a longitudinal sectional view, and FIG. 2 is a partially cut front view seen from the right side of FIG. 3 is an enlarged view of a part of FIG. 2, FIG. 4 is an enlarged view of a part of FIG. 1, and FIG. 5 is a front view of the driven disk in FIG. In FIG. 1 and FIG. 2, hatching indicating a cross section is omitted for easy understanding of the drawings. 1 to 5, the torque fluctuation absorber 10 includes a driving side rotating member 20 and a driven side rotating member 30. The drive-side rotating member 20 includes a first drive plate 21, a second drive plate 22, a ring gear 23, an inertia ring 24, an inner plate 25, and spacers 26 and 27 as main components. The cylindrical portion 21b on the outer peripheral portion of the first drive plate 21 constitutes a guide surface 21a by its inner periphery. The first drive plate 21, the second drive plate 22, and the inertia plate 24 are welded at the outer peripheral portion, and the ring gear 23 is welded to the first drive plate 21. For welding the first drive plate 21, the second drive plate 22, and the inertia plate 24, plasma welding is adopted according to the invention of this application, and the welding is reliably performed even if there is a slight shift in the position of the joint surface. Has been. Arc welding is employed for welding the ring gear 23 and the first drive plate 21. The first drive plate 21, the inner plate 25, and the spacers 26 and 27 are connected by rivets, and bolts (not shown) are inserted into the axial holes formed in these plates and screwed to the engine output shaft (not shown). Is combined with the engine.

  The driven-side rotating member 30 includes eight driven disks 31 positioned between the first drive plate 21 and the second drive blade 22 in the axial direction, and the driven disks 31 disposed at intervals in the circumferential direction. And a flywheel 33 connected by a bolt 32. The flywheel 33 is rotatably supported by the inner plate 25 via a ball bearing 40. The flywheel 33 has a friction surface 33a for a friction clutch (not shown) for intermittently transmitting torque between the engine and a transmission (not shown).

  As shown in FIG. 1, the head of the bolt 32 is disposed between the first drive plate 21 and the driven disk 31 in the axial direction. Eight holes 21 c for tightening the bolts 32 are provided in the first drive plate 21. An adhesive tape 41 that covers and closes the hole 21c from the outside of the drive plate 21 is attached to the outer surface of the first drive plate 21 in order to prevent dust and the like outside the torque fluctuation absorber 10 from entering the inside through the hole 21c. It has been. The material of the adhesive tape 41 is polyester.

  A circumferential space 50 is formed between the guide surface 21 a of the first drive plate 21 and the outer periphery of the driven disk 31. The space 50 is formed on the outer periphery of a pair of torque transfer members 28 and 29 and a driven disk 31 that are coupled to the drive plates 21 and 22 by rivets at two locations that are 180 degrees apart in the circumferential direction. A torque delivery portion 31a located between the members 28 and 29 is installed.

  Each of the two circumferential spaces between the torque delivery members 28, 29 and the torque delivery portion 31a, which are located 180 degrees apart in the circumferential direction, is slidably guided by the guide surface 21a of the first drive plate 21. Further, three low spring load coil springs 70 to 72, two middle spring load coil springs 73 and 74, and three high spring load coil springs 70 to 72 supported by the nine spring seats 60 to 68, respectively. Coil springs 75, 76 and 77 are installed in series in the circumferential direction.

  According to the invention of this application, each of the spring seats 60 to 68 is made of aluminum having good thermal conductivity for supporting the end of the sliding member A made of resin and sliding on the guide surface 21a and the coil spring, as shown in FIG. It is comprised by couple | bonding so that the sheet | seat member B made from an alloy may be in thermal contact with each other. As a result, heat generated by friction between the sliding member A and the guide surface 21a is transmitted from the sliding member A to the sheet member B and is well radiated from the sheet member B, so that the heat is trapped in the sliding member A. The resulting wear resistance and strength reduction are prevented. As shown in FIG. 3, the sliding member A and the sheet member B are coupled to the surface of the sliding member A among the surfaces of the sliding member A and the sheet member B facing each other in the radial direction. This is achieved by fitting the provided convex portion Aa to the corresponding concave portion Ba provided on the surface of the sheet member B with an adhesive interposed therebetween. In the adhesive, aluminum alloy powder is mixed in order to increase thermal conductivity.

  As shown in FIGS. 2 and 3, each sheet member B is formed with a boss portion Bb that protrudes toward the inner peripheral side of the coil spring. The boss portion Bb is tapered so as to be tapered, and the outer diameter of the base portion of the boss portion Bb is approximated to the inner diameter of the coil spring. Thus, each of the coil springs 70 to 77 is supported by the spring seats 60 to 68 guided by the guide surface 21 a so that each of the coil springs 70 to 77 is centrifugally applied to the first drive plate 21. Contact with the guide surface 21a and wear and damage are prevented. Further, since a clearance space C exists between the outer periphery of the boss portion Bb and the inner periphery of the coil spring at a location other than the root portion of the boss portion Bb, the centrifugal force acting on the coil spring is applied to the root portion of the boss portion Bb. However, it is not applied to the tip of the boss Bb, etc., so that excessive stress at the base of the boss Bb is suppressed and damage to the sheet member B is avoided. Further, the two boss portions Bb facing each other of the sheet member B at both ends of the coil spring approach each other according to an increase in the amount of deflection of the coil spring and abut against each other to limit the amount of deflection of the coil spring. To prevent adhesion. As can be seen, the spring loads of the coil springs 70 to 77 change according to the amount of deflection. The maximum torsion angle between the driving side rotating member 20 and the driven side rotating member 30 is defined by the torque transfer members 28 and 29 and the torque transfer portion 31a being in contact with each other via the spring seats 60 to 68. Is done.

  The rotational direction of the engine is a positive rotational direction F indicated by an arrow in FIG. 2, and the direction of the engine driving torque that acts between the driving side rotational member 20 and the driven side rotational member 30 coincides with the positive rotational direction F. Further, the direction of the engine brake torque acting between the driving side rotating member 20 and the driven side rotating member 30 coincides with the negative rotation direction R indicated by the arrow in FIG.

  The coil springs 70 to 77 are arranged such that the coil springs 75 and 76 with high spring load, the coil spring 73 with medium spring load, the coil spring 73 with low spring load, and the other end portion on the positive rotation direction F side in the circumferential space. The coil springs 70, 71, 72, the middle spring load coil spring 74, and the high spring load coil spring 77 are arranged in this order. And the maximum value of each spring load of the coil springs 75 to 77 having a high spring load is set to a value larger than a value necessary for transmission of the maximum drive torque of the engine. The minimum spring load (spring load at the time of setting) of the coil spring 75 is set smaller than a value necessary for transmitting the maximum driving torque of the engine.

  The maximum value of the spring load of the spring 77 is set to a value larger than a value necessary for transmitting the maximum brake torque of the engine. The minimum spring load of the coil spring 77 (spring load at the time of setting) is set smaller than a value necessary for transmitting the maximum brake torque of the engine.

  As shown in FIG. 5, the driven disk 31 has eight holes 31 b to 31 b through which the bolts 32 are passed. In the circumferential direction, the circumferential intervals between the holes 31b to 31b are narrowed at a portion close to the torque delivery portion 31a and widened at a portion far from the torque delivery portion 31a. That is, the circumferential interval between the bolts 32 is narrowed at a portion where the load is large, and the circumferential interval between the bolts 32 is widened at a portion where the load is small, and eight bolts 32 are rationally arranged. .

  Between the driving side rotating member 20 and the driven side rotating member 30, hysteresis devices 80 and 90 for generating a predetermined friction resistance torque with respect to the relative rotation of the both, that is, torsion, are interposed.

  The hysteresis device 80 includes six block-shaped thrust linings 81 to 81 movably inserted in six circumferentially long windows 31 c to 31 c formed on the driven disk 31, and the second drive plate 22. A ring-shaped thrust plate 82 that rotates integrally but is axially movable and sandwiches the thrust linings 81 to 81 from both sides in the axial direction with the first drive plate 21, and the thrust plate 82 is used as a thrust lining. It consists of a cone spring 83 that urges toward it. The connection between the second drive plate 22 and the thrust plate 82 is achieved by inserting three or more bent claw portions 82 a provided on the outer peripheral edge of the thrust plate 82 into the square holes 22 a formed in the second drive plate 22. Yes. Each bending claw portion 82 a is also fitted to a corresponding notch portion 83 a formed on the outer peripheral edge of the cone spring 83. Since there are three or more fittings between the notch 83a and the bending claw 82a in the circumferential direction, the cone spring 83 is accurately positioned by the contact between the circumferential ends of the bending claw 82a and the drive plate 22 in the circumferential direction. Centered and positioned. As a result, the effect of uneven load on the thrust lining 81 is avoided, and uneven wear of the thrust lining 81 is prevented.

  In order to reliably prevent the thrust lining 81 from falling off due to centrifugal force, a step portion 21d is provided on the friction surface of the first drive plate 21, and the point of application of the cone spring 83 to the srest plate 82 is in the radial direction. It is arranged on the outer diameter side from the center of the thrust lining 81.

  In order to suppress the change with time of the frictional resistance torque generated by the hysteresis device 80, grease is applied to the friction portions of the thrust lining 81, the drive plate 21, and the thrust plate 82. A grease reservoir 81a is provided on the friction surface of the thrust lining 81 in order to maintain the lubricating action of the grease for a long period of time.

  Further, rubber members 84 are attached to the circumferential ends of the window portions 31c of the driven disk 31 in order to eliminate the annoying impact sound generated when the thrust lining 81 directly contacts the driven disk 31. Is in contact with the driven disk 31 via the rubber member 84. Each rubber member 84 is attached to the window portion 31c by pre-compressing the rubber member 84 and fitted into the wide portion 31d at the circumferential end of the window portion 31c, or in the circumferential direction of the window portion 31c of the driven disk 31. This is achieved by providing protrusions for holding rubber members at both ends.

  The second hysteresis device 90 is sandwiched from both sides in the axial direction by the thrust plate 91 that is non-rotatable with respect to the inner plate 25 but is movably connected in the axial direction, and the thrust plate 91 and the flywheel 33. The thrust plate 91 includes a thrust lining 92 that is non-rotatably connected to the thrust plate 91, and a cone spring 93 that biases the thrust plate 91 toward the thrust lining 92. Grease is also applied to the friction portion of the hysteresis device 90.

  FIG. 6 is a diagram showing torsional characteristics of the torque fluctuation absorber shown in FIGS. FIG. 2 shows a state in which the torsion angle is zero, and there is a gap between each torque delivery portion 31a and the spring seat adjacent thereto. This gap disappears when the twist angle reaches the twist angle θ1 or −θ1 in FIG. When the torsion angles are in the range of torsion angles θ1 to θ2 and −θ1 to −θ2 in FIG. 6, the coil springs 70 to 77 expand and contract. When the torsion angles reach the torsion angles θ2 and −θ2 in FIG. 6, the coil springs 70 to 72 having low spring loads are shrunk, and in the ranges of torsion angles θ2 to θ3 and −θ2 to −θ3 in FIG. The springs 73 to 77 expand and contract. When the torsion angles reach the torsion angles θ3 and −θ3 in FIG. 6, the coil springs 74 and 75 are also shrunk, and in the ranges of torsion angles θ3 to θ4 and −θ3 to −θ4 in FIG. 77 expands and contracts. The hysteresis torque H2 shown in FIG. 6 is given by the hysteresis device 80, and the hysteresis torque H1 is given by the hysteresis device 90.

  In order to more reliably prevent the thrust lining 81 from falling off due to centrifugal force, the step portions 21d and 82b are respectively provided on the friction surface of the first drive plate 21 and the friction surface of the thrust plate 82 as shown in FIG. It is also possible that the point of application of the cone spring 83 to the rest plate 82 is arranged on the outer diameter side of the center of the thrust lining 81 in the radial direction.

  Further, it is sufficient that the clearance space C for preventing the centrifugal force of the coil spring from being applied to a portion other than the root of the boss Bb of each sheet member B of the spring seats 60 to 68 is inside the boss Bb in the radial direction. Therefore, as shown in FIG. 8, the clearance space C may be provided by providing a stepped portion Bc inside the boss portion Bb in the radial direction.

  Further, as shown in FIG. 9, the bolt tightening hole 21 c provided in the first drive plate 21 is covered and closed by a plate 42 sandwiched between the first drive plate 21 and the spacer 26. It is good.

It is a longitudinal cross-sectional view of 1st Embodiment of the torque fluctuation absorber of invention of this application. FIG. 2 is a partially cut front view seen from the right side of FIG. 1. FIG. 3 is a partially enlarged view of FIG. 2. It is a partially expanded view in FIG. It is a front view of the driven plate in FIG. FIG. 6 is a diagram showing torsional characteristics of the torque fluctuation absorber shown in FIGS. It is a figure which shows the modification of the 1st hysteresis apparatus 80 of FIG. It is a figure which shows the modification of the boss | hub part Bb of the sheet | seat member B in FIG. It is a figure which shows the modification of the structure which plugs up the bolt fastening hole.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 110 ... Torque fluctuation absorber 20 ... Drive side rotation member 21, 22 ... Drive plate 21a ... Guide surface of drive side rotation member 21d ... Step part 28, 29 ... Drive Torque delivery member 30 of the side rotation member 30... Driven side rotation member 31... Driven disk 31 a... Torque delivery part 31 b of the driven side rotation member 31. ... Bolt 40 ... Ball bearing 50 ... Space 60-68 ... Spring seat A ... Sliding member Aa ... Convex part B ... Sheet member Ba ... Concave part Bb ... -Boss part C ... Relief space 70-77 ... Coil spring 80, 90 ... Hysteresis device 81 ... Thrust lining 82 ... Thrust plate 82a ... Bending claw Part 82b ... step part 83 ... cone spring 83a ... notch

Claims (6)

A torque passing portion is provided on the driving side rotating member that rotates integrally with the engine, and a torque passing portion is also provided on the driven side rotating member that is arranged coaxially and rotatably with respect to the driving side rotating member. Hysteresis device for applying a predetermined friction torque between the driving side rotating member and the driven side rotating member in a torque fluctuation absorbing device in which an elastic member for transmitting torque is installed in the circumferential space between the delivery parts And a block-shaped thrust lining inserted through the window formed in the part of the driven side rotating member so as to be movable in the axial direction, and rotate integrally with the driving side rotating member, but move in the axial direction. A thrust plate which is connected to the thrust lining between the drive side rotary member and the thrust side lining from both sides in the axial direction; A cone spring that is biased toward the inning, and a step portion that suppresses the outward movement of the thrust lining in the radial direction is provided on a friction surface of the driving side rotating member that is rubbed against the thrust lining. A torque fluctuation absorber according to claim 1, wherein a point where the spring is applied to the thrust plate is arranged on the outer diameter side of the center of the thrust lining in the radial direction. 3. The torque fluctuation absorber according to claim 2, wherein a stepped portion for suppressing movement of the thrust lining radially outward is also provided on a friction surface of the thrust plate that rubs against the thrust lining. Torque fluctuation absorber. A torque passing portion is provided on the driving side rotating member that rotates integrally with the engine, and a torque passing portion is also provided on the driven side rotating member that is arranged coaxially and rotatably with respect to the driving side rotating member. Hysteresis that gives a predetermined friction resistance torque between the driving side rotating member and the driven side rotating member in a torque fluctuation absorbing device in which an elastic member for transmitting torque is installed in the circumferential space between the delivery parts The apparatus rotates integrally with the drive-side rotating member in the axial direction, and a block-shaped thrust lining inserted through the window portion formed in the part of the driven-side rotating member so as to be movable in the axial direction. A thrust plate connected movably and sandwiching the thrust lining from both sides in the axial direction with the driving side rotating member; and the thrust plate Consists of a cone spring that urges toward the lining, and a plurality of notches are formed on one of the outer periphery and inner periphery of the cone spring in a circumferentially distributed manner, and fitted into these notches. A torque fluctuation absorber according to claim 1, wherein a plurality of bending claws are formed on the thrust plate, and the cone spring is positioned in the radial direction by fitting the plurality of bending claws and the notch. A torque passing portion is provided on the driving side rotating member that rotates integrally with the engine, and a torque passing portion is also provided on the driven side rotating member that is arranged coaxially and rotatably with respect to the driving side rotating member. Hysteresis that gives a predetermined friction resistance torque between the driving side rotating member and the driven side rotating member in a torque fluctuation absorbing device in which an elastic member for transmitting torque is installed in the circumferential space between the delivery parts The apparatus rotates integrally with the drive-side rotating member in the axial direction, and a block-shaped thrust lining inserted through the window portion formed in the part of the driven-side rotating member so as to be movable in the axial direction. A thrust plate connected movably and sandwiching the thrust lining from both sides in the axial direction with the driving side rotating member; and the thrust plate A rubber member for preventing direct contact between the thrust lining and the driven rotating member is attached to both end portions in the circumferential direction of the window portion. Torque fluctuation absorber. A torque passing portion is provided on the driving side rotating member that rotates integrally with the engine, and a torque passing portion is also provided on the driven side rotating member that is arranged coaxially and rotatably with respect to the driving side rotating member. In a torque fluctuation absorber having an elastic member for transmitting torque in a circumferential space between delivery parts, a predetermined friction resistance torque is applied between the driving side rotating member and the driven side rotating member. A torque fluctuation absorbing device characterized in that two or more hysteresis devices are provided and grease is applied to a friction portion of the hysteresis device. 6. The torque fluctuation absorber according to claim 5, wherein a recess for collecting grease is provided in a friction part of the hysteresis device.

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