JP2013164090A - Torsional vibration damping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a torsional vibration damping device that allows one end of a torque transmission member to make contact with a cam surface of a cam member always at rotation of the torsional vibration damping device, and that can prevent deterioration of torsional characteristics.SOLUTION: In a torsional vibration damping device 1: one end in an extending direction of a plate 32 is positioned at a side closer to one end 17a of an arm member 17 than a rotary shaft 10 in a circumferential direction of disk plates 8 and 9 and attached to a radially outer peripheral part of the arm member 17, and a mass member 33 is provided at the other end in the extending direction of the plate 32; and a support shaft 34 is positioned at the side of the one end 17a of the arm member 17 with respect to the rotary shaft 10 in the circumferential direction of the disk plates 8 and 9.

Description

  The present invention relates to a torsional vibration damping device, and in particular, is interposed between an internal combustion engine of a vehicle and a transmission of a drive transmission system, and torque is transmitted between a first rotating member and a second rotating member. As described above, the present invention relates to a torsional vibration damping device in which a first rotating member and a second rotating member are connected to each other through a torque transmission member and an elastic member so as to be relatively rotatable.

  Conventionally, a drive source such as an internal combustion engine or an electric motor is connected to a wheel or the like via a drive transmission system having a transmission or the like, and power is transmitted from the drive source to the wheel via the drive transmission system. However, in the drive transmission system connected to the drive source, for example, a jarr sound or a humming noise is generated by torsional vibration using a rotational fluctuation due to a torque fluctuation of the internal combustion engine as a vibration source.

  A jagged noise is a jagged sound that is generated when a pair of idling gears of a transmission gear set that constitutes a transmission provided in a drive transmission system collides with a torsional vibration caused by a fluctuation in rotation caused by a torque fluctuation of an internal combustion engine. It is a sound. Further, the muffled noise is an abnormal noise generated in the vehicle interior due to vibration caused by torsional resonance of the drive transmission system using the torque fluctuation of the internal combustion engine as an excitation force. The torsional resonance of the drive transmission system is, for example, in a steady region. Exists.

  Conventionally, a drive source such as an internal combustion engine or an electric motor is connected to wheels and the like to transmit torque from the drive source and torsion that absorbs torsional vibration between the drive source and a drive transmission system having a transmission gear set. A vibration damping device is known (see, for example, Patent Document 1).

  This torsional vibration damping device has a cam surface on the outer peripheral portion, and is provided on the same axis as the cam member, and a cam member configured such that the curvature of the cam surface changes along the circumferential direction. A pair of disk plates that are rotatable relative to each other, and an elastic member that is provided between the cam member and the pair of disk plates and elastically deforms when the cam member and the pair of disk plates rotate relative to each other. Yes.

  The torsional vibration damping device has one end contacting the cam surface of the cam member and the other end biased by the elastic member. When the cam member and the pair of disk plates rotate relative to each other, A bent arm member that transmits torque between the cam member and the pair of disk plates is provided by rotating about a rotation fulcrum provided on the disk plate to elastically deform the elastic member. .

  In this torsional vibration damping device, the arm member rotates as the cam member rotates to elastically deform the elastic member, thereby widening the range of the torsion angle between the cam member and the pair of disk plates. be able to.

  For this reason, the torsional rigidity between the cam member and the pair of disk plates can be lowered as a whole, and the dampening noise and the booming noise can be sufficiently attenuated to improve the vibration damping performance.

WO2011-067815

  However, in such a conventional torsional vibration damping device, since one end portion of the arm member is in contact with the cam surface of the cam member, the vibration is input from the internal combustion engine to the torsional vibration damping device. The one end of the arm member may be separated from the cam surface of the cam member, and the one end of the arm member may not always contact the cam surface of the cam member.

  Therefore, in a state where one end of the arm member is in contact with the cam surface of the cam member, torque can be transmitted from the pair of disk plates to the cam member via the elastic member and the arm member. In a state where is spaced from the cam surface of the cam member, torque cannot be transmitted from the arm member to the cam member.

  In particular, since the vibration input from the internal combustion engine to the torsional vibration damping device increases as the rotational speed of the internal combustion engine increases, one end portion of the arm member moves from the cam surface of the cam member when the internal combustion engine rotates at a high speed. It becomes easy to separate.

  For this reason, a pair of disc plates and a cam member are formed by repeating a state in which one end of the arm member is in contact with the cam surface of the cam member and a state of being separated from the cam surface of the cam member by vibration input from the internal combustion engine. The torque followability deteriorates when the torsion is twisted.

Therefore, in contrast to the normal torsional characteristic indicated by the solid line in FIG. 13, the torsional characteristic is disturbed as indicated by the broken line, and the torsional characteristic of the torsional vibration damping device is deteriorated. As a result, the drivability of the vehicle may be deteriorated.
The torsional characteristics shown in FIG. 13 indicate the torque output from the cam member with respect to the torsion angle between the pair of disk plates and the cam surface of the cam member.

  Also, if the arm member is displaced from a state where one end of the arm member is separated from the cam surface of the cam member to a state where the arm member is in contact with the cam surface of the cam member, the arm member collides with the cam surface of the cam member. May occur.

  The present invention has been made to solve the above-described conventional problems. One end portion of the torque transmission member can always be brought into contact with the cam surface of the cam member during rotation of the torsional vibration damping device. An object of the present invention is to provide a torsional vibration damping device capable of preventing deterioration of characteristics.

  In order to achieve the above object, the torsional vibration damping device according to the present invention is (1) provided on the same axis as the first rotating member and the first rotating member, with respect to the first rotating member. A second rotating member that is relatively rotatable, and provided between the first rotating member and the second rotating member, and the first rotating member and the second rotating member are relatively rotated. And an elastic member that transmits torque between the first rotating member and the second rotating member, and the first rotating member so as to rotate integrally with the first rotating member. A cam member having a cam surface whose curvature changes with a change in torsion angle of the first rotating member and the second rotating member, and one end of the cam member contacting the cam surface of the cam member. And the other end portion contacts one end portion of the elastic member in the extending direction, When the first rotating member and the second rotating member rotate relative to each other, the elastic member is elastically deformed by rotating about a rotating shaft provided in the second rotating member, A torsional vibration damping device comprising a torque transmitting member for transmitting torque between a first rotating member and the second rotating member, wherein the torsional vibration damping device rotates on a support shaft provided on the second rotating member A pressing member that is freely attached, and one end portion in the extending direction of the pressing member is positioned closer to one end portion of the torque transmission member than the rotating shaft in the circumferential direction of the second rotating member. The torque transmitting member extends to the outer periphery in the radial direction, a mass body is provided at the other end in the extending direction of the pressing member, and the support shaft rotates in the circumferential direction of the second rotating member. From what is located on one end side of the torque transmission member with respect to the shaft It has been made.

  In this torsional vibration damping device, the cam member presses the elastic member via the arm member as the cam member rotates, and the reaction force from the elastic member to the arm member is changed, so that the first rotating member and the first rotating member Torque can be transmitted between the first rotating member and the second rotating member by widening the range of the torsion angle with the second rotating member. For this reason, the torsional rigidity of the first rotating member and the second rotating member can be lowered as a whole, and the vibration damping performance can be improved.

  Further, in this torsional vibration damping device, one end portion of the pressing member in the extending direction is positioned closer to one end portion of the torque transmitting member than the rotating shaft in the circumferential direction of the second rotating member. The mass body is provided at the other end portion in the extending direction of the pressing member, and the support shaft is configured to be positioned on the one end portion side of the torque transmitting member with respect to the rotating shaft. For this reason, when centrifugal force is generated as the rotational speed of the torsional vibration damping device increases, the mass body moves outward in the radial direction of the second rotating member.

  When the mass body moves outward in the radial direction of the second rotating member, one end portion in the extending direction of the pressing member presses the torque transmitting member radially inward by the lever principle with the support shaft as a fulcrum. Since the support shaft is positioned on the one end portion side of the torque transmission member with respect to the rotation shaft in the circumferential direction of the second rotating member, when one end portion of the pressing member presses the torque transmission member radially inward, One end of the torque transmission member in the extending direction is pressed against the cam surface of the cam member.

  Therefore, one end of the torque transmission member is always pressed against the cam surface of the cam member, and torque can be transmitted from the second rotating member to the cam member via the elastic member and the torque transmission member. As a result, it is possible to prevent the torsional characteristics of the torsional vibration damping device from deteriorating.

  In addition, since one end of the torque transmission member can always be brought into contact with the cam surface of the cam member, it is possible to prevent the torque transmission member from colliding with the cam member and generating sound. Further, since torque can be constantly transmitted from the torque transmitting member to the cam member, it is possible to prevent the follow-up performance of the torque from being deteriorated when the second rotating member and the cam member are twisted, and torsional vibration When the damping device is mounted on a vehicle, it is possible to prevent the drivability of the vehicle from deteriorating.

  In the torsional vibration damping device according to the above (1), (2) the pressing member has an insertion hole through which the rotating shaft is inserted, and one end portion in the extending direction is fixed to the torque transmitting member, and the extending direction It is comprised from what has the plate by which the mass body was attached to the other end part.

  In this torsional vibration damping device, since the pressing member has a plate, a part of the pressing member can be thinned, the installation space of the pressing member is reduced, and the torsional vibration damping device is prevented from being enlarged. be able to.

  In the torsional vibration damping device according to the above (1) and (2), (3) a rolling element is rotatably provided at one end of the torque transmission member, and the one end of the torque transmission member is inserted through the rolling element. It is comprised from what contacts the cam surface of a cam member.

  In this torsional vibration damping device, since one end portion of the torque transmission member contacts the cam surface of the cam member via the rolling element, it is possible to prevent the contact pressure between the one end portion of the torque transmission member and the cam member from increasing. It is possible to suppress wear between the one end of the arm portion and the cam member.

  In the torsional vibration damping device of (1) to (3) above, (4) the first rotating member has the cam member on the outer peripheral portion, and the input shaft of the transmission of the drive transmission system on the inner peripheral portion. The second rotating member is disposed on both sides in the axial direction of the cam member, and is fixed to each other at a predetermined interval in the axial direction, and the torque is transmitted via the rotating shaft. A pair of disc plates that rotatably support the member; and a support portion that is provided on the pair of disc plates and supports the other end in the extending direction of the elastic member. It consists of what transmits power from the engine.

  In the torsional vibration damping device, a pair of disk plates is provided with a support portion that supports the other end portion in the extending direction of the elastic member, and one end portion in the extending direction of the elastic member is in contact with the other end portion of the torque transmitting member. Since the other end portion of the torque transmission member contacts the cam surface of the cam member, the range of the torsion angle between the pair of disk plates and the cam member can be widened to reduce the rigidity of the elastic member.

  For this reason, in a region where the twist angle between the pair of disk plates and the cam member is small, such as when the shift position is changed to neutral and the internal combustion engine is in an idle state, the low-rigid elastic member makes the minute It is possible to suppress the generation of a rattling sound from the transmission gear set constituting the transmission by attenuating the vibration.

  Further, in a region where the torsion angle between the pair of disk plates and the cam member is large, it is possible to obtain a highly rigid torsion characteristic that increases the torsion angle between the pair of disk plates and the cam member and increases the torque increase rate. .

  Therefore, a large torsional vibration caused by a rotational fluctuation caused by a torque fluctuation of the internal combustion engine or a torsional resonance of the drive transmission system is attenuated, and a jagged noise generated by collision of the idle gear pair of the transmission gear set or the drive transmission system It is possible to suppress the occurrence of a booming sound due to torsional resonance.

  According to the present invention, the torsional vibration damping device can always prevent one end portion of the torque transmission member from contacting the cam surface of the cam member during rotation of the torsional vibration damping device and prevent the torsional characteristics from deteriorating. Can be provided.

It is a figure which shows one Embodiment of the torsional vibration damping device which concerns on this invention, and is a perspective view of a torsional vibration damping device. It is a figure which shows one Embodiment of the torsional vibration damping device which concerns on this invention, and is a perspective view of the torsional vibration damping device of the state except one side of the disk plate. It is a figure which shows one Embodiment of the torsional vibration damping device which concerns on this invention, and is a front view of a torsional vibration damping device. It is a figure which shows one Embodiment of the torsional vibration damping apparatus which concerns on this invention, and is AA direction arrow sectional drawing of FIG. It is a figure which shows one Embodiment of the torsional vibration damping device which concerns on this invention, and is a top view of an arm member. It is a figure which shows one Embodiment of the torsional vibration damping device which concerns on this invention, and is a BB direction arrow directional cross-sectional view of FIG. 5 except a press member. It is a figure which shows one Embodiment of the torsional vibration damping device which concerns on this invention, and is a block diagram of a plate. It is a figure which shows one Embodiment of the torsional vibration damping device which concerns on this invention, and is a C direction arrow line view of FIG. It is a figure which shows one Embodiment of the torsional vibration damping device which concerns on this invention, and is a front view of the torsional vibration damping device when the torsion angle of a disk plate and a cam member is +30 degrees. It is a figure which shows one Embodiment of the torsional vibration damping device which concerns on this invention, and is a front view of the torsional vibration damping device when the torsion angle of a disk plate and a cam member is +60 degrees. It is a figure which shows one Embodiment of the torsional vibration damping device which concerns on this invention, and is a front view of the torsional vibration damping device when the torsion angle of a disk plate and a cam member is +90 degrees. It is a figure which shows one Embodiment of the torsional vibration damping device which concerns on this invention, and is a front view of the torsional vibration damping device when the torsion angle of a disk plate and a cam member is -45 degrees. It is a figure which shows one Embodiment of the torsional vibration damping device which concerns on this invention, and is a figure which shows the relationship between the twist angle of a torsional vibration damping device, and a torque.

Hereinafter, embodiments of a torsional vibration damping device according to the present invention will be described with reference to the drawings.
1 to 13 are diagrams showing an embodiment of a torsional vibration damping device according to the present invention.
First, the configuration will be described.
1 to 4, the torsional vibration damping device 1 includes a first rotating member 2 and a second rotating member 3 provided on the same axis as the first rotating member 2.

  Torque from an internal combustion engine (not shown) that is a driving source is input to the second rotating member 3, and the first rotating member 2 transmits drive torque (not shown) to the torque of the second rotating member 3. Is transmitted to the transmission of the system.

  A pair of coil springs 4 as elastic members are provided between the first rotating member 2 and the second rotating member 3, and the coil spring 4 is composed of the first rotating member 2 and the second rotating member. 3 is elastically deformed in the circumferential direction of the first rotating member 2 when it is relatively rotated.

  The first rotating member 2 includes a boss 6 that is spline-fitted to the outer peripheral portion of the input shaft 5 (see FIG. 4) of the transmission of the drive transmission system, and a cam member 7 provided on the outer peripheral portion of the boss 6. Consists of including.

  The boss 6 and the cam member 7 may be integrally formed. Further, the boss 6 and the cam member 7 are formed separately, spline portions are formed on the outer peripheral portion of the boss 6 and the inner peripheral portion of the cam member 7, and the boss 6 and the cam member 7 are spline-fitted. Also good.

  The second rotating member 3 includes a pair of disk plates 8 and 9 and a clutch disk 11. The disc plates 8 and 9 are arranged on both sides of the cam member 7 in the axial direction, and are connected by a rotating shaft 10 at a predetermined interval in the axial direction.

  The rotating shaft 10 is bridged to the disk plates 8 and 9, and both end portions in the axial direction are formed to have a large diameter, and are thereby locked to the disk plates 8 and 9. For this reason, the disc plates 8 and 9 are integrally rotated by being integrated by the rotating shaft 10.

  A boss 6 is accommodated in the circular center holes 8 a and 9 a of the disk plates 8 and 9, and the boss 6 is provided on the same axis as the disk plates 8 and 9.

  The clutch disk 11 is provided radially outward of the disk plate 8 and includes a cushioning plate 12 and friction materials 13a and 13b. The cushioning plate 12 is composed of a ring-shaped member that undulates in the thickness direction, and is fixed to the disc plate 8 by rivets 14a.

  The friction materials 13a and 13b are fixed to both surfaces of the cushioning plate 12 by rivets 14b. The friction materials 13a and 13b are bolted to a flywheel (not shown) fixed to the crankshaft of the internal combustion engine and to the flywheel. It is located between the pressure plate of the clutch cover.

  The friction members 13a and 13b are pressed against the pressure plate and frictionally engaged with the flywheel and the pressure plate, whereby the torque of the internal combustion engine is input to the disk plates 8 and 9.

  When a clutch pedal (not shown) is depressed, the pressure plate releases the pressing of the friction members 13a and 13b, and the friction members 13a and 13b are separated from the flywheel, so that the torque of the internal combustion engine is reduced to the disc plate 8, 9 is not entered.

  The disk plate 8 is provided with a pedestal 15 as a support portion, and the pedestal 15 is attached to the disk plate 9 so as to protrude from the disk plate 8 in the axial direction.

  The other end portion in the extending direction of the coil spring 4 as an elastic member is attached to the pedestal 15, and a spring seat 16 is attached to one end portion in the extending direction of the coil spring 4. Is the free end.

  Further, an arm member 17 as a torque transmission member is provided between the coil spring 4 and the cam member 7, and this arm member 17 is located between the disk plates 8 and 9 and is attached to the rotating shaft 10. It is supported rotatably.

  As shown in FIGS. 5 and 6, a needle bearing 18 is interposed between the rotating shaft 10 and the arm member 17. The needle bearing 18 includes an outer race 18a attached to the arm member 17, and a needle needle 18b interposed between the outer race 18a and the rotating shaft 10, and the outer race 18a is a needle needle. It is freely rotatable with respect to the rotating shaft 10 via 18b.

For this reason, the arm member 17 is rotatably attached to the rotating shaft 10 via the needle bearing 18.
As shown in FIGS. 5 and 6, one end portion 17 a of the arm member 17 is formed with protruding pieces 17 A and 17 B as bifurcated plate-like portions, and these protruding pieces 17 A and 17 B are connected by a pin 19. Has been.

  A roller member 20 as a rolling element is rotatably attached to the pin 19. The roller member 20 includes an outer race 20a provided on the outer peripheral portion of the pin 19 and a needle bearing formed of a needle needle 20b interposed between the outer race 20a and the pin 19, and an outer race on the outer peripheral portion of the outer race 20a. The roller 20c is attached to the roller 20c. The roller 20c is rotatable with respect to the pin 19 via a needle bearing.

The roller 20c rotates in contact with the cam surface 7a of the cam member 7, and one end 17a of the arm member 17 contacts the cam surface 7a of the cam member 7 through the roller 20c.
The other end portion 17b of the arm member 17 is formed with bifurcated projecting pieces 17C and 17D as plate-like portions, and the projecting pieces 17C and 17D are connected by a pin 21.

  A roller member 22 as a rolling member is rotatably attached to the pin 21. The roller member 22 includes an outer race 22a provided on the outer peripheral portion of the pin 21 and a needle bearing composed of a needle needle 22b interposed between the outer race 22a and the pin 21, and an outer race on the outer peripheral portion of the outer race 22a. The roller 22c is attached to 22a, and the roller 22c is rotatable with respect to the pin 21 via a needle bearing.

The roller 22c is in contact with the outer peripheral surface of the spring seat 16, and the other end 17b of the arm member 17 is in contact with the outer peripheral surface of the spring seat 16 via the roller 22c.
Further, the cam member 7 has a cam surface 7a whose curvature changes as the twist angle between the disk plates 8 and 9 and the cam member 7 changes.

  In the present embodiment, the cam member 7 has an elliptical cam surface, and the curvature of the cam surface 7a is the smallest torsion angle between the disk plates 8 and 9 and the cam member 7 (the torsion angle is substantially 0 °). ) From the initial position of the cam member 7 increases as the torsion angle between the disc plates 8 and 9 and the cam member 7 increases.

  Therefore, the cam member 7 according to the present embodiment is configured so that the roller 20c of the arm member 17 contacts the cam surface 7a having a small curvature when the twist angle between the disk plates 8 and 9 and the cam member 7 is minimum. An initial position of 7 is set.

  For this reason, when the cam member 7 rotates and the position of the cam surface 7a where the roller 20c of the arm member 17 contacts is varied, the spring seat 16 is biased by the arm member 17 and the compression amount of the coil spring 4 is reduced. Variable. At this time, the spring seat 16 moves so as to approach and separate from the base 15.

  The arm member 17 is arranged point-symmetrically with respect to the central axis of the disk plates 8 and 9, and the arm member 17 is a cam surface 7 a having the same curvature across the central axis of the disk plates 8 and 9. The one end portion 17a can be brought into contact with the first end portion 17a.

  On the other hand, as shown in FIG. 4, a hysteresis mechanism 23 is interposed between the disk plates 8 and 9 and the cam member 7, and this hysteresis mechanism 23 is an annular friction material 24, 25, 26, 27. And a disc spring 28.

The friction members 24 and 25 are formed of an annular member having a predetermined friction coefficient on the surface, and are attached to both sides of the cam member 7 in the width direction.
The friction members 26 and 27 are formed of annular members having surfaces having a predetermined friction coefficient, and are attached to the disk plates 8 and 9 so as to face the friction members 24 and 25 in the axial direction, respectively.

  The disc spring 28 is formed in a conical shape, and is interposed between the friction material 27 and the disk plate 9. The disc spring 28 generates an elastic force in the axial direction of the cam member 7, thereby bringing the friction material 24 and the friction material 26 into frictional contact and bringing the friction material 25 and the friction material 27 into frictional contact. Hysteresis torque is generated between the cam member 7 and the disk plates 8 and 9.

  On the other hand, the torsional vibration damping device 1 includes a pressing member 31. As shown in FIGS. 7 and 8, the pressing member 31 includes a plate 32 and a mass member 33, and an insertion hole 32 a is formed at the center in the extending direction of the plate 32.

  A pin hole 32b is formed at one end of the plate 32 in the extending direction, and a mass member 33 as a mass body made of metal is attached to the other end of the plate 32 in the extending direction. Further, both end portions of the support shaft 34 are caulked and fixed to the disk plates 8 and 9, and the plate 32 is rotatably supported by the support shaft 34 by inserting the insertion holes 32 a into the support shaft 34. Has been.

  As shown in FIG. 3, one end in the extending direction of the plate 32 extends toward the one end 17 a of the arm member 17 with respect to the rotating shaft 10 in the circumferential direction of the disk plates 8 and 9. One end portion in the extending direction of the arm member 17 is attached to the outer peripheral portion in the radial direction of the arm member 17 by a caulking pin 35 inserted through the pin hole 32b.

  The caulking pin 35 is provided so as to protrude from the outer peripheral portion in the radial direction of the arm member 17. The caulking pin 35 is inserted into the pin hole 32 b of the plate 32 to crush the head portion of the caulking pin 35. It is comprised so that it may fix to the radial direction outer peripheral part of the arm member 17. FIG. Note that one end of the plate 32 in the extending direction may be attached to the arm member 17 by a bolt or the like instead of the caulking pin 35.

  The support shaft 34 is positioned on the one end 17 a side of the arm member 17 with respect to the rotation shaft 10 in the circumferential direction of the disk plates 8 and 9, and is attached to the other end in the extending direction of the plate 32. The mass member 33 is located on the coil spring 4 side with respect to the support shaft 34 in the circumferential direction of the disk plates 8 and 9.

Next, the operation will be described.
9 to 12 show a state in which the disk plates 8 and 9 are rotating in the counterclockwise rotation direction (R2 direction) from the state of FIG. 3 in response to the torque of the internal combustion engine. The description will be made assuming that the disc plates 8 and 9 are twisted in the clockwise direction (R1 direction) on the positive side.

  9 to 12 show a state in which the disk plate 9 is removed. The cam member 7 is twisted to the positive side with respect to the disk plates 8 and 9 when the vehicle is accelerating, and the cam member 7 is twisted to the negative side when the vehicle is decelerating.

  The friction members 13 a and 13 b are pressed against the pressure plate and frictionally engaged with the flywheel and the pressure plate, whereby the torque of the internal combustion engine is input to the disk plates 8 and 9.

  If the rotational fluctuation due to the torque fluctuation of the internal combustion engine is small at the time of acceleration of the vehicle, the fluctuation torque between the disk plates 8 and 9 and the cam member 7 is small, and the cam member 7 has a timepiece with respect to the disk plates 8 and 9. Relative rotation in the rotation direction (R1 direction).

  At this time, when the cam member 7 rotates in the R1 direction as the torsion angle between the disk plates 8 and 9 and the cam member 7 increases as in the state shown in FIG. 9 from the state shown in FIG. 20c rolls along the cam surface 7a. For this reason, the one end part 17a of the arm member 17 slides on the cam surface 7a via the roller 20c. FIG. 9 shows a state where the twist angle is 30 °.

  Since the curvature of the cam surface 7a increases as the torsional angle between the disk plates 8, 9 and the cam member 7 increases from the initial position of the cam member 7, one end portion 17a of the arm member 17 has a roller 20c. Is pressed against the cam surface 7a of the cam member 7 whose curvature gradually increases, the other end portion 17b of the arm member 17 moves radially inward and circumferentially of the disk plates 8 and 9.

  As the cam member 7 rotates in the R1 direction, the other end 17b of the arm member 17 moves inward in the radial direction of the disk plates 8 and 9 and in the circumferential direction, whereby the coil spring 4 is compressed. As a result, the spring seat 16 approaches the pedestal 15.

  Further, when the rotational fluctuation due to the torque fluctuation of the internal combustion engine further increases, the fluctuation torque transmitted from the disk plates 8 and 9 to the cam member 2 is large, and the cam member 2 rotates clockwise with respect to the disk plates 8 and 9. Further relative rotation in the direction (R1 direction).

  When the twist angle between the disk plates 8, 9 and the cam member 2 is further increased from the state shown in FIG. 9, the roller 20c of the arm member 17 rolls along the cam surface 2a as shown in FIG. One end 16a of 17 slides on the cam surface 2a via the roller 20c. FIG. 10 shows a state where the twist angle is 60 °.

  At this time, when one end 17a of the arm member 17 is pressed against the cam surface 7a of the cam member 7 whose curvature gradually increases via the roller 20c, the other end 17b of the arm member 17 is Move further radially inward and circumferentially.

  As the cam member 7 rotates in the R1 direction, the other end portion 17b of the arm member 17 further moves in the radial inner direction and the circumferential direction of the disk plates 8 and 9, thereby causing the coil spring 4 to move. Further compressed, the spring seat 16 is further brought closer to the base 15.

  The arm member 17 biases the coil spring 4 in this way, so that the arm member 17 strongly pushes the cam member 7 by the lever principle with the pivot shaft 10 as a fulcrum by the reaction force of the coil spring 4 to be compressed. Press with pressure.

  Therefore, while transmitting the power of the internal combustion engine from the disk plates 8 and 9 to the cam member 7, the torsional vibration between the disk plates 8 and 9 and the cam member 7 is absorbed and attenuated.

  Further, when the rotation fluctuation due to the torque fluctuation of the internal combustion engine further increases, the fluctuation torque transmitted from the disk plates 8 and 9 to the cam member 7 increases, and the state shown in FIG. 10 to the state shown in FIG. Further, the cam member 7 further rotates relative to the disk plates 8 and 9 in the clockwise direction (R1 direction).

  As shown in FIG. 11, when the torsion angle between the disk plates 8 and 9 and the cam member 7 reaches the maximum + 90 °, for example, the roller 20c of the arm member 17 is placed on the top portion 7b having the maximum curvature of the cam surface 7a. Is positioned, and the cam member 7 urges the coil spring 4 with a larger urging force via the arm member 17.

  Therefore, the reaction force of the coil spring 4 is further increased, and the torsional vibration between the disk plates 8 and 9 and the cam member 7 is absorbed while the power of the internal combustion engine is transmitted from the disk plates 8 and 9 to the cam member 7. It attenuates.

  In this case, the curvature of the cam surface 7a is further increased as the torsion angle between the disc plates 8, 9 and the cam member 7 increases from the initial position of the cam member 7, so When the one end portion 17a is pressed against the cam surface 7a of the cam member 7 whose curvature gradually increases through the roller 20c, the other end portion 17b of the arm member 17 is inwardly and radially around the disk plates 8 and 9. Move in the direction.

  Also in this case, the other end 17b of the arm member 17 moves along the circumferential outer peripheral surface of the spring seat 16 via the roller 22c, so that the spring seat 16 and the other end 17b of the arm member 17 are connected. Abrasion can be prevented.

Further, when an excessive torque is input to the disk plates 8 and 9 from the internal combustion engine, the roller 20c of the arm member 17 gets over the top portion 7b having the largest curvature of the cam surface 7a and the disk plates 8 and 9 are moved to the cam member 7. Therefore, the cam member 7 can function as a torque limiter when the vehicle is accelerated.
As a result, it is possible to prevent excessive torque from being transmitted from the disk plates 8 and 9 to the cam member 7 and to protect the transmission gear set of the transmission.

  Further, since the hysteresis mechanism 23 is interposed between the disk plates 8 and 9 and the cam member 7, a certain hysteresis torque is generated when the disk plates 8 and 9 and the cam member 7 rotate relative to each other. Can do.

  On the other hand, as the rotational speed of the internal combustion engine increases, vibration is input from the internal combustion engine to the torsional vibration damping device 1, and a force that displaces one end portion 17 a of the arm member 17 away from the cam surface 7 a of the cam member 7 is generated. Works.

  At this time, the mass member 33 is moved outward in the radial direction of the disk plates 8 and 9 by the centrifugal force acting on the torsional vibration damping device 1, and one end portion in the extending direction of the plate 32 uses the support shaft 34 as a fulcrum. The arm member 17 is pressed radially inward according to the principle.

  Since the support shaft 34 is located on the one end portion 17a side of the arm member 17 with respect to the rotation shaft 10 in the circumferential direction of the disk plates 8 and 9, one end portion in the extending direction of the plate 32 causes the arm member 17 in the radial direction. When pressed inward, one end 17a of the arm member 17 is pressed against the cam surface 7a of the cam member 7, and the one end 17a of the arm member 17 can always be pressed against the cam surface 7a of the cam member 7.

  Further, as the rotational speed of the internal combustion engine increases, the vibration input to the torsional vibration damping device 1 increases, the arm member 17 rotates about the rotation shaft 10, and the one end 17a of the arm member 17 is a cam member. A greater force acts in a direction away from the cam surface 7a.

  However, since the rotational speed of the torsional vibration damping device 1 increases as the rotational speed of the internal combustion engine increases, the centrifugal force acting on the torsional vibration damping device 1 increases and the centrifugal force applied to the mass member 33 further increases.

  Therefore, the mass member 33 moves outward in the radial direction of the disk plates 8 and 9, and one end portion in the extending direction of the plate 32 has the support shaft 34 as a fulcrum, and the arm member 17 is moved radially inward by the lever principle. Press with great force.

  Therefore, the one end portion 17 a of the arm member 17 is pressed with a large force by the cam surface 7 a of the cam member 7, and the one end portion 17 a of the arm member 17 is not separated from the cam surface 7 a of the cam member 7.

  That is, in the torsional vibration damping device 1 of the present embodiment, the centrifugal force acting on the mass member 33 increases as the centrifugal force increases, and the pressing force pressing the arm member 17 against the cam surface 7a of the cam member 7 is increased. Can do. As a result, the one end 17 a of the arm member 17 can be constantly pressed against the cam surface 7 a of the cam member 7.

  Further, when the vehicle is decelerated, the driving torque of the internal combustion engine is reduced and engine braking is generated, so that torque is input to the cam member 7 from the input shaft 5 of the transmission. When the rotational fluctuation due to the torque fluctuation of the internal combustion engine is small during deceleration, the fluctuation torque between the cam member 7 and the disk plates 8 and 9 is small, so that the cam member 7 is relatively relative to the disk plates 8 and 9. It will be twisted to the negative side (R2 direction).

  At this time, when the disk plates 8 and 9 and the cam member 7 are rotated relative to each other as shown in FIG. 12 from the state shown in FIG. 3, the torsion angle between the disk plates 8 and 9 and the cam member 7 is large. As the cam member 7 rotates, the roller 20c of the arm member 17 rolls along the cam surface 7a. For this reason, the one end part 17a of the arm member 17 slides on the cam surface 7a via the roller 20c.

  Since the curvature of the cam surface 7a increases as the torsional angle between the disk plates 8, 9 and the cam member 7 increases from the initial position of the cam member 7, one end portion 17a of the arm member 17 has a roller 20c. Is pressed against the cam surface 7a of the cam member 7 whose curvature gradually increases, the other end portion 17b of the arm member 17 moves radially inward and circumferentially of the disk plates 8 and 9.

  As the cam member 7 rotates in the counterclockwise direction (R2 direction), the other end 17b of the arm member 17 moves inward in the radial direction of the disk plates 8 and 9, whereby the coil spring 4 is moved. Is compressed and the spring seat 16 approaches the pedestal 15.

  Further, the other end 17b of the arm member 17 moves along the circumferential outer peripheral surface of the spring seat 16 via the roller 22c, so that the spring seat 16 and the other end 17b of the arm member 17 are worn. Can be prevented. FIG. 12 shows a state where the twist angle between the disk plates 8 and 9 and the cam member 7 is −45 °.

  The arm member 17 biases the coil spring 4 in this way, so that the arm member 17 strongly pushes the cam member 7 by the lever principle with the pivot shaft 10 as a fulcrum by the reaction force of the coil spring 4 to be compressed. Press with pressure.

  Therefore, while transmitting the power of the drive transmission system from the cam member 7 to the disk plates 8 and 9, the torsional vibration between the disk plates 8 and 9 and the cam member 7 is absorbed and attenuated.

  Also at this time, a centrifugal force acts on the torsional vibration damping device 1 so that the arm member 17 rotates about the rotation shaft 10 and the one end 17a of the arm member 17 is separated from the cam surface 7a of the cam member 7. Force acts in the direction.

  At this time, the mass member 33 moves outward in the radial direction of the disk plates 8 and 9, and one end portion in the extending direction of the plate 32 uses the support shaft 34 as a fulcrum and moves the arm member 17 inward in the radial direction by the lever principle. The one end portion 17 a of the arm member 17 is pressed against the cam surface 7 a of the cam member 7.

  Even when the vehicle is decelerating, when the disc plates 8 and 9 and the cam member 7 are relatively rotated by the hysteresis mechanism 23, a certain hysteresis torque can be generated.

  Thus, the torsional vibration damping device 1 of the present embodiment includes a cam member 7 and a cam member 7 having an elliptical cam surface 7a that is provided on the outer peripheral portion of the cam member 7 and rotates integrally with the cam member 7. Provided between the cam member 7 and the coil spring 4, one end 17 a contacts the cam surface 7 a and the other end 17 b contacts the spring seat 16 of the coil spring 4, and is bridged by the disk plates 8 and 9. The arm member 17 is configured to rotate about the rotation shaft 10, and the roller member 20 is provided between the cam member 7 and the cam surface 7 a of the cam member 7 at one end 17 a of the arm member 17. The

  For this reason, the torsional rigidity of the torsional vibration damping device 1 can be reduced as a whole by widening the torsional angle range between the disk plates 8 and 9 and the cam member 7, and the torsional characteristics can be made non-linear. , Vibration damping performance can be improved.

  The solid line in FIG. 13 is a diagram showing the torsional characteristics of the disc plates 8 and 9 and the cam member 7. The torsion angle between the disc plates 8 and 9 and the cam member 7 in this embodiment and the cam member 7 output the solid line. It is a graph explaining the relationship with output torque.

  The horizontal axis represents the relative twist angle of the cam member 7 with respect to the disk plates 8 and 9, and the vertical axis represents the output torque output from the cam member 7. The output torque on the vertical axis corresponds to the reaction force of the cam member 7 against the disk plates 8 and 9.

  In this embodiment, the coil spring 4 contracts as the torsion angle of the cam member 7 with respect to the disk plates 8 and 9 increases, so that the pressing force to the cam member 7 by the arm member 17 increases.

  And the output torque becomes large because the pressing force to the cam member 7 by the arm member 17 becomes large. The change in the output torque at this time becomes a curved torsional characteristic that continuously changes without having a stepped portion as shown in FIG.

  In the present embodiment, the one end 17a of the arm member 17 is brought into contact with the elliptical cam surface 7a via the roller member 20, so that the disk plates 8, 9 and the cam member 7 Can be widened to 180 ° in total on the positive and negative sides.

  The torsional characteristics and the torsional angle when the disk plates 8 and 9 and the cam member 7 rotate relative to each other are the shape of the cam surface 7a of the cam member 7, the spring constant of the coil spring 4, and the shape of the arm member 17. By adjusting the above, it is possible to set an arbitrary twist characteristic and twist angle.

  Further, as shown in FIG. 13, the torsional vibration damping device 1 of the present embodiment has a torsional rigidity between the disk plates 8 and 9 and the cam member 7 when the torsion angle between the disk plates 8 and 9 and the cam member 7 is small. Low flat torsional characteristics can be achieved.

  For this reason, in a region where the torque transmitted from the disk plates 8, 9 to the cam member 7 (output torque of the cam member 7) is small, such as when the shift position is changed to neutral and the internal combustion engine is in an idle state, Torsional vibration caused by rotational fluctuation caused by torque fluctuation of the internal combustion engine can be attenuated to suppress the generation of a rattling sound from the transmission gear set of the transmission in an unloaded state.

  Note that the rattling noise is a rattling noise generated when a gear pair in an unloaded state collides with a torsional vibration caused by a rotational fluctuation caused by a torque fluctuation of the internal combustion engine during idling when the speed is changed to neutral. .

  Further, since the torsional vibration damping device 1 of the present embodiment can widen the range of the torsion angle between the disk plates 8 and 9 and the cam member 7 and reduce the overall torsional rigidity, In an operating state in which the torque transmitted from 9 to the cam member 7 is large, the torsional vibration caused by the rotational fluctuation due to the torque fluctuation of the driving source is attenuated, and the idle gear pair of the transmission gear set collides with it. Jara noise can be suppressed.

  Further, when the torsional angle between the disk plates 8 and 9 and the cam member 7 is large, the torsional rigidity of the torsional vibration damping device 1 can be made lower than the conventional torsional rigidity. The vibration can be attenuated to a greater degree than before, and the generation of a booming noise in the passenger compartment can be suppressed.

  In addition, in the present embodiment, since the hysteresis mechanism 23 is interposed between the disk plates 8 and 9 and the cam member 7, when the disk plates 8 and 9 and the cam member 7 rotate relative to each other, a constant amount is obtained. Hysteresis torque can be generated.

  For this reason, during acceleration / deceleration with a large torque transmitted from the disk plates 8 and 9 to the cam member 7, a hysteresis torque is generated against a large torsional vibration caused by a rotational fluctuation caused by a torque fluctuation of the drive source. be able to.

  Therefore, it is possible to further attenuate the torsional vibration due to the torsional resonance of the drive transmission system and further suppress the generation of a muffled sound in the vehicle interior, and it is possible to further suppress the generation of the jagged sound.

  Further, in the present embodiment, as the torsion angle between the cam member 7 and the disk plates 8 and 9 increases, the curvature of the cam surface 7a increases and the amount of elastic deformation of the coil spring 4 increases. For this reason, if the roller member 20 is not present at the one end portion 17a of the arm member 17, the contact pressure between the one end portion 17a of the arm member 17 and the cam member 7 increases, and the contact surface between the arm member 17 and the cam member 7 is increased. There is a risk of wear.

  In the present embodiment, since the one end portion 17a of the arm member 17 slides on the cam surface 7a of the cam member 7 via the roller 20c, the contact pressure between the one end portion 17a of the arm member 17 and the cam member 7 increases. Can be prevented, and wear of the one end 17a of the arm member 17 and the cam member 7 can be suppressed.

  Further, in the torsional vibration damping device 1 of the present embodiment, one end portion in the extending direction of the plate 32 is positioned closer to the one end portion 17a side of the arm member 17 than the rotary shaft 10 in the circumferential direction of the disk plates 8 and 9. The mass member 33 is provided at the other end in the extending direction of the plate 32 and the support shaft 34 is connected to the rotating shaft 10 in the circumferential direction of the disk plates 8 and 9. In contrast, the arm member 17 is configured to be positioned on the one end 17a side.

  For this reason, when a centrifugal force acts on the torsional vibration damping device 1, the mass member 33 is caused to exert a centrifugal force so that the one end 17a of the arm member 17 can be constantly pressed against the cam surface 7a of the cam member 7, and the disk Torque can be transmitted from the plates 8 and 9 to the cam member 7 via the coil spring 4 and the arm member 17.

  As a result, as shown by a solid line in FIG. 13, the torsional characteristics of the torsional vibration damping device 1 can be prevented from being disturbed (conventional disturbances are indicated by broken lines), and the torsional characteristics of the torsional vibration damping device 1 are deteriorated. Can be prevented.

  Moreover, since the one end part 17a of the arm member 17 can always be brought into contact with the cam surface 7a of the cam member 7, it is possible to prevent the arm member 17 from colliding with the cam member 7 and generating a hitting sound. .

  Further, since the torque can be constantly transmitted from the arm member 17 to the cam member 7, it is possible to prevent the follow-up performance of the torque from deteriorating when the disk plates 8, 9 and the cam member 7 are twisted. It is possible to prevent the drivability of the vehicle from deteriorating.

  Further, in the torsional vibration damping device 1 of the present embodiment, since the pressing member 31 has the thin plate 32, the installation space of the pressing member 31 can be reduced, and the torsional vibration damping device 1 is increased in size. Can be prevented.

  In the present embodiment, bifurcated projecting pieces 17A and 17B are formed at one end 17a of arm member 17, and roller member 20 is rotatably provided between projecting pieces 17A and 17B. A bifurcated projecting piece 17C, 17D is formed at one end 17a of the member 17, and a roller member 22 is rotatably provided between the projecting pieces 17C, 17D.

  Instead, the arm member 17 is composed of a pair of plates, one end 17a of the pair of plates is connected by a pin 19, and the roller member 20 is rotatable between the one end 17a of the plate via the pin 19. In addition, the other end 17b of the pair of plates may be connected by a pin 21, and the roller member 22 may be rotatably provided between the other end 17b of the plate via the pin 21.

  Further, in the present embodiment, the torsional vibration damping device 1 is interposed between the internal combustion engine of the vehicle and the drive transmission system having the transmission. Any torsional vibration damping device may be used.

  For example, in a hybrid vehicle, the present invention is applied to a torsional vibration damping device such as a hybrid damper interposed between an output shaft of an internal combustion engine and a power split mechanism that splits power into an electric motor and a wheel side output shaft. May be.

  Further, the present invention may be applied to a torsional vibration damping device such as a lockup damper interposed between a lockup clutch device of a torque converter and a transmission gear set. Further, a torsional vibration damping device may be provided between the differential case and a ring gear provided on the outer periphery of the differential case.

  In the present embodiment, the cam surface 7a of the cam member 7 has an elliptical shape. However, the cam surface has a curvature that changes with a change in the twist angle between the disk plates 8 and 9 and the cam member 7. If it exists, it is not limited to an elliptical shape.

  As described above, the torsional vibration damping device according to the present invention can always contact one end portion of the torque transmission member with the cam surface of the cam member during rotation of the torsional vibration damping device, and the torsional characteristics are deteriorated. And is interposed between the internal combustion engine of the vehicle and the transmission of the drive transmission system, and torque is transmitted between the first rotating member and the second rotating member. Thus, it is useful as a torsional vibration damping device or the like in which the first rotating member and the second rotating member are connected to each other through a torque transmission member and an elastic member so as to be relatively rotatable.

DESCRIPTION OF SYMBOLS 1 Torsional vibration damping device 2 1st rotation member 3 2nd rotation member 4 Coil spring (elastic member)
6 Boss 7 Cam member 7a Cam surface 8, 9 Disc plate 10 Rotating shaft 15 Base (supporting part)
17 Arm member (torque transmission member)
17a One end of the arm member 17b Other end of the arm member 31 Pressing member 32 Plate 32a Insertion hole 33 Mass member (mass body)
34 Support shaft

Claims (4)

A first rotating member;
A second rotating member provided on the same axis as the first rotating member and rotatable relative to the first rotating member;
The first rotating member is provided between the first rotating member and the second rotating member, and elastically deforms when the first rotating member and the second rotating member rotate relative to each other, whereby the first An elastic member for transmitting torque between the rotating member and the second rotating member;
A cam surface is provided on the first rotating member so as to rotate integrally with the first rotating member, and the curvature of the cam surface changes with a change in torsion angle of the first rotating member and the second rotating member. A cam member having
When one end part contacts the cam surface of the cam member and the other end part contacts one end part in the extending direction of the elastic member, and the first rotating member and the second rotating member rotate relative to each other. Further, torque is generated between the first rotating member and the second rotating member by rotating about the rotating shaft provided on the second rotating member to elastically deform the elastic member. A torsional vibration damping device comprising a torque transmitting member for transmitting
A pressing member rotatably attached to a support shaft provided in the second rotating member;
One end portion in the extending direction of the pressing member is positioned closer to one end portion of the torque transmission member than the rotation shaft in the circumferential direction of the second rotation member, and is located on the radially outer peripheral portion of the torque transmission member. A mass body is provided at the other end in the extending direction of the pressing member,
The torsional vibration damping device, wherein the support shaft is located on one end side of the torque transmission member with respect to the rotation shaft in a circumferential direction of the second rotation member.   The pressing member has an insertion hole through which the rotating shaft is inserted, and has a plate in which one end portion in the extending direction is fixed to the torque transmitting member and a mass body is attached to the other end portion in the extending direction. The torsional vibration damping device according to claim 1.   The rolling element is rotatably provided at one end of the torque transmitting member, and the one end of the torque transmitting member contacts the cam surface of the cam member via the rolling element. Item 3. The torsional vibration damping device according to Item 2. The first rotating member has a boss having the cam member on an outer peripheral portion and an input shaft of a transmission of a drive transmission system connected to an inner peripheral portion;
The second rotating members are arranged on both sides in the axial direction of the cam member, are fixed to each other at a predetermined interval in the axial direction, and rotatably support the torque transmitting member via the rotating shaft. A pair of disc plates, and a support portion provided on the pair of disc plates and supporting the other end in the extending direction of the elastic member,
The torsional vibration damping device according to any one of claims 1 to 3, wherein power is transmitted from the internal combustion engine to the pair of disk plates.

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