JP6528655B2 - Vibration reduction device - Google Patents

Description

  The present invention relates to a vibration reducing device for reducing torsional vibration, and more particularly to a vibration reducing device in which a rolling element rotatable relative to the rotating member is accommodated in a rotating member that rotates by receiving a torque. It is.

  Heretofore, there has been known a vibration reducing device which reduces torsional vibration of a rotating body by forming an inertial mass body as a rolling element and reciprocating the rolling element along a rolling surface formed on the rotating body. (See, for example, Patent Document 1). For example, the vibration reducing device is powered by an elastic damper that reduces the vibration of the torque output by the power source using the elastic action of a spring, and a pendulum damper provided on a rotating body on the output side of the elastic damper. It is configured to reduce and transmit the fluctuation of the torque output by the source.

  The pendulum damper is disposed, for example, inside the torque converter, and the rolling element and the rolling surface are sealed or sealed in a watertight manner by the housing so that the reciprocation of the rolling element is not impeded by the hydraulic pressure in the torque converter. It is done. The housing is constituted of, for example, an annular input side plate disposed on the engine side and an annular output side plate disposed on, for example, the turbine runner side. The input plate and the output plate rotate in response to the torque generated by the engine. A center plate is disposed between the input plate and the output plate. The center plate is provided rotatably relative to the input side plate and the output side plate via a spring functioning as an elastic damper. The input-side plate and the output-side plate are provided with a housing portion which is formed by bending the open side toward the inner peripheral side into a cross-sectional “C” shape. The center plate holds rolling elements for a pendulum damper that reciprocates in the rotational direction due to torque fluctuations. The input side plate and the output side plate are connected to the center plate in such a manner that the housing part covers the region where the rolling element reciprocates so as not to contact the rolling element.

International Publication No. 2013/128590

  By the way, the rotating body for transmitting the driving force output from the power source, for example, the center plate, inevitably vibrates due to the input torque fluctuation, load fluctuation, or friction. The frequency of vibration changes in accordance with the number of revolutions, and higher-order vibration higher than the secondary vibration is also generated. Therefore, the amplitude increases due to resonance, which in turn causes noise and deterioration in durability.

  In the above-mentioned vibration reducing device, the input side plate and the output side plate which constitute the housing are connected to one plate, and are formed so as to be bent in a U-shape in cross section, that is, a bag shape. In such a configuration, it has been found that the lower order of rotation of the housing, for example, the vibration frequency of the first order component generated at the time of rotation occurs in a relatively low frequency region. For this reason, if the resonance frequency of the housing is included in the vibration frequency region of the lower order of rotation of the engine, for example, the primary component, the vibration transmission rate is amplified at the resonance frequency of the housing. In this case, the vibration from the engine is easily transmitted to the housing, and the dustproofness and waterproofness of the housing may be impaired.

  This invention was made paying attention to said technical subject, Comprising: It aims at providing the vibration reduction apparatus which can aim at the dustproof property and waterproof improvement of a housing.

According to the present invention, in order to solve the above problems, a rolling element for vibration damping that reciprocates in the rotational direction of the rotating body is held by the fluctuation of the torque on the rotating body that receives the torque and rotates. In a vibration reducing device including a pendulum damper having a cover attached to the rotating body so as to cover a region in which the moving body reciprocates so as not to contact the rolling element, the cover is attached to one side surface of the rotating body First cover member and the second cover member attached to the other side surface of the rotating body, and the first cover member and the second cover member move from the area where the rolling element reciprocates. It has an outer peripheral side tongue piece portion extending outward in the radial direction of the rotary body, and an inner peripheral side tongue piece portion extending inward in the radial direction of the rotary body from the region where the rolling element reciprocates, First cover The outer peripheral tongue portion and the inner peripheral tongue portion are pressed against the one surface of the rotary body and fastened to the rotary body, and the outer peripheral tongue portion of the second cover member The first cover member and the second cover member cover the area by pressing the inner peripheral tongue and the other surface of the rotating body and fastening it to the rotating body. , And is attached to the rotating body.
In this invention, through holes aligned on the same axis are formed in the outer peripheral tongue in the first cover member and the outer tongue in the second cover and the rotary body, The outer peripheral tongue portion of the first cover member and the outer peripheral tongue portion of the second cover member are fastened to the rotating body by the fastening member inserted into the hole, and the inner portion of the first cover member is inserted. Other through holes aligned on the same axis are formed in the peripheral tongue and the inner peripheral tongue in the second cover member and the rotor, and the other through holes are inserted into the other through holes. The inner circumferential tongue portion of the first cover member and the inner circumferential tongue portion of the second cover member may be fastened to the rotating body by the fastening member.
Furthermore, in the present invention, the primary side plate to which torque is input, and the secondary side plate rotatable relative to the primary side plate are the relative between the primary side plate and the secondary side plate. An elastic damper connected via an elastic body generating an elastic force directed in a rotational direction is further provided, and the outer tongue portion in each of the first cover member and the second cover member is fastened to the rotating body. and that the fastening member also has properly said first cover member and the second cover front SL other concluded members have entered into the inner side tongue portion to said rotating member in each of the members, in the elastic damper The first cover member and the second cover member and the rotating body may be connected to the secondary plate through the secondary plate.

  According to the present invention, the first cover member and the second cover member covering the region where the rolling element held by the rotating body rolls are provided with the outer peripheral side tongue piece portion extending outward from the region and the inner side extending inward. A tongue portion is provided, and the first cover member and the second cover member are fastened to the rotating body using the outer peripheral tongue portion and the inner tongue portion. As a result, the connection rigidity of the first cover member and the second cover member to the rotating body is enhanced, and when the rotating body rotates, the resonance frequencies of the first cover member and the second cover member are reduced to the lower rotational order of the engine, for example, the first order It can be set higher than the frequency domain of the component. Therefore, the dustproofness and waterproofness of the first cover member and the second cover member can be improved.

It is a sectional view showing an example of a pendulum damper used for a vibration reducing device concerning this invention, and a rotating body and a cover member are fastened by a bolt nut fastening body. It is a side view which shows the principal part of the pendulum damper demonstrated in FIG. It is sectional drawing which shows the other example of the pendulum damper used for the vibration reduction apparatus which concerns on this invention, and has fastened the rotary body and the cover member with the rivet. It is a side view which shows the principal part of the pendulum damper demonstrated in FIG. It is a sectional view showing an example of a vibration reduction device concerning this invention. It is sectional drawing which shows the other example of the vibration reduction apparatus which concerns on this invention.

  Hereinafter, an example of the vibration reduction device according to the present invention will be described. FIG. 1 shows an example of a pendulum damper 9 used in a vibration reduction device. The vibration reducing device using the pendulum damper 9 is, for example, the inside of a torque converter, or a power source, for example, an output shaft of an engine and an input shaft such as a transmission, or in a hybrid vehicle, an output shaft of an engine and a motor generator. Between the axis of rotation of the

  As shown in FIG. 1, the rotating body 10 constituting the pendulum damper 9 rotates, for example, about the rotation shaft 11 in response to a torque output from the engine. A first cover member 12 formed in a ring shape is attached to one side surface 10 a of the rotary body 10, and a second cover formed in a ring shape on the other side surface 10 b opposite to the one side surface The member 13 is attached. That is, the first cover member 12 and the second cover member 13 are attached so as to sandwich the rotating body 10. The first cover member 12 is formed with an annular first recess 14 which is recessed one step. The second cover member 13 is formed with an annular second recess 15 which is recessed one step. Since the first recess 14 and the second recess 15 function as so-called ribs, the rigidity of the first cover member 12 and the second cover member 13 can be improved even if the plate thickness is small.

  In the rotating body 10, a plurality of insertion holes 16 are formed at predetermined intervals in the circumferential direction, and the rolling elements 17 are inserted into the respective insertion holes 16. In order to prevent the rolling element 17 from being separated from the insertion hole 16, the outer diameters of both end portions 18 and 19 are formed larger than the width of the insertion hole 16. That is, the intermediate shaft portion 20 formed with a diameter smaller than the outer diameters of the both end portions 18 and 19 of the rolling element 17 is inserted into the insertion hole 16. The rolling element 17 is reciprocated in the insertion hole 16 according to the torsional vibration of the rotating body 10.

The inner wall surface 21 on the outer peripheral side of the insertion hole 16 is formed, for example, in an arc shape, and the rolling element 17 rolls along the inner wall surface 21. That is, the rolling element 17 is inserted in the insertion hole 16 so as to rotate in the same direction as the rotation of the rotating body 10 and to rotate relative to the rotating body 10. The inner wall surface 21 is formed so as to roll the rolling element 17 in accordance with the order of the torque vibration input to the rotating body 10, for example. That is, the square root of the value R divided from the center of rotation of rolling element 17 to the center of rotation of rotating body 10 divided by the distance L from the center of gravity of rolling element 17 to the center of rotation of rolling element 17 However, the inner wall surface 21 of the insertion hole 16 formed in the rotating body 10 is formed so that it becomes the order n of the torque vibration input into the rotating body 10. The relationship is shown in the following equation.
n = ((R / L)

  In addition, if the inner wall surface 21 of the insertion hole 16 is formed so that the vibration order in which the rolling element 17 rolls and the vibration order in which the vibration is reduced by rolling the rolling element 17 coincide with each other. Therefore, the shape of the wall facing the inner wall 21 is not particularly limited. Further, the shape of the rolling element 17 is not limited to the shape having the intermediate shaft portion 20 as described above. For example, the rolling element 17 can roll along the inner wall surface 21 of the insertion hole 16 It should be done. Furthermore, the rolling element 17 rolls along the inner wall surface 21. Therefore, in order to improve the lubricity between the rolling element 17 and the inner wall surface 21, the surface of the rolling element 17 may be coated with a resin, and the outer peripheral surface of the rolling element 17 or the inner wall surface 21 of the insertion hole 16 is greased. May be applied.

  The first cover member 12 and the second cover member 13 are attached to the rotating body 10 in the direction in which the first recess 14 and the second recess 15 face each other. The first recess 14 and the second recess 15 constitute an accommodating portion 23 that accommodates the insertion hole 16 and the rolling element 17. The housing portion 23 is provided in an annular shape, and covers a region in which the plurality of rolling elements 17 reciprocate so as not to be in contact with the rolling elements 17.

  By the way, when the vibration reduction device is used, for example, in a torque converter, the inside of the torque converter is filled with oil, and the rolling elements 17 constituting the pendulum damper 9 are immersed in the oil. Therefore, when the rolling element 17 receives viscous resistance of oil, the vibration order of the rolling element 17 may be changed, and the effect of reducing the vibration may be reduced. Therefore, the first cover member 12 and the second cover member 13 function as the housing 25 in order to keep the inside of the housing portion 23 in a dry state, that is, in a state in which the lubricating oil is not supplied. The housing 25 is an example of a cover.

  In addition, although the 1st cover member 12 and the 2nd cover member 13 which comprise the housing 25 are each demonstrated as singular, it may be comprised by plurality not only in this, for example. For example, a plurality of first cover members individually covering the regions in which each of rolling elements 17 rolls are fastened to one side surface 10a of rotating body 10, and a plurality of second cover members are the same as or similar to one side surface 10a. The housing 25 may be configured by fastening the cover member to the other side surface 10 b.

  The first cover member 12 has an outer peripheral tongue portion 26 extending outward in the radial direction of the rotary body 10 from a region where the rolling element 17 reciprocates, and an inner peripheral tongue extending in the radial direction from the region. One piece 27 is integrally provided. The second cover member 13 integrally includes an outer peripheral tongue portion 28 extending outward in the radial direction from the region, and an inner peripheral tongue portion 29 extending inward in the radial direction from the region. ing. The outer peripheral tongues 26 and 28 and the inner peripheral tongues 27 and 29 function as attachment allowances for attaching to the rotating body 10. Note that each of the outer peripheral tongues 26 and 28 and the inner peripheral tongues 27 and 29 is a band-shaped tongue provided continuously in the circumferential direction of the rotating body 10 or partially provided. Including the form of a plurality of tongues.

  Through holes 30 and 31 are formed in the outer peripheral tongues 26 and 28, respectively. A through hole 32 is formed in the rotary body 10 at a position corresponding to the through holes 30 and 31. Through holes 33 and 34 are formed in the inner peripheral tongue portions 27 and 29, respectively. A through hole 35 is formed in the rotary body 10 at a position corresponding to the through holes 33 and 34.

  Fastening members, for example, bolt and nut fastening bodies 36 are attached to the through holes 30 to 32 on the outer peripheral side. The bolt and nut fastening body 37 is attached to the through holes 33 to 35 on the inner peripheral side. In the bolt-nut fasteners 36 and 37, for example, the bolt 38 is inserted along one direction from the through holes 30 and 33 of the first cover member 12 to the through holes 31 and 34 of the second cover member 13, and the nut 39 is It is tightened in the screw part of bolt 38 from the other direction opposite to the one direction. As a result, the first cover member 12, the rotary body 10 and the second cover member 13 are located at two positions on the outer peripheral side and the inner peripheral side in the radial direction with respect to the accommodation portion 23 from both sides in the axial direction of the bolt 38 In a pressed state, that is, in a state in which a compressive force is applied, they are linked and integrally rotated. In addition, if the space | interval in the radial direction of two positions fastened with the bolt nut fastening bodies 36 and 37 is shortened, since connection rigidity will become higher, a vibration of the housing 25 can further be reduced.

  FIG. 2 shows a side view of the pendulum damper 9 described in FIG. 1 as viewed from the second cover member 13 side. As shown in FIG. 2, the bolt-nut fastening bodies 36 on the outer peripheral side are constituted by bolt-nut fastening bodies 36a, 36b,... Provided in plural at predetermined intervals in the circumferential direction. The bolt and nut fastening bodies 37 on the inner peripheral side are constituted by bolt and nut fastening bodies 37a, 37b,... Provided in plural at predetermined intervals in the circumferential direction. In addition, if the space | interval in the circumferential direction of two positions fastened with the bolt nut fastening bodies 36 and 37 is shortened, since connection rigidity will become higher, a vibration of the housing 25 can be reduced further.

  Thus, in the pendulum damper 9 described with reference to FIGS. 1 and 2, the positions to be fastened by the bolt and nut fastening members 36 and 37 are two in the outer circumferential side and the inner circumferential side sandwiching the housing portion 23 and the circumferential direction Are provided at predetermined intervals. Therefore, the connection rigidity of the housing 25 can be enhanced and the resonance frequency of the housing 25 can be set higher than the frequency range of the first order rotational frequency of the engine, for example, as compared with the related art. . Thereby, the dustproofness and waterproofness of the housing 25 can be improved.

  FIG. 3 shows another example of a pendulum damper used in the vibration reducing device of the present invention. As shown in FIG. 3, the first cover member 12 and the second cover member 13 constituting the pendulum damper 40 are the same as or similar to those described in FIG. 1, with the outer peripheral tongues 26 and 28 and the inner peripheral tongue It has one side 27, 29. The outer peripheral tongues 26 and 28 are fastened to the rotating body 10 by fastening members, for example, rivets 41. The inner tongues 27 and 29 are fastened to the rotating body 10 by rivets 42. The rivet 41 includes a head and a body without a screw, and is inserted into one of the through holes 30 to 32 on the outer peripheral side, for example, from one side in the axial direction, and caulked with a dedicated tool. The rotor 10 and the outer peripheral tongues 26 and 28 are fastened by plastic deformation of the part. Further, the rivet 42 is inserted into the through holes 33 to 35 on the inner peripheral side to fasten the rotary body 10 and the inner peripheral tongue portions 27 and 29 in the same manner as or similar to the fastening of the rivet 41. Thereby, the first cover member 12, the rotating body 10 and the second cover member 13 are connected in a state where they are pressed from both of the rivets 41 and 42 in the axial direction, that is, in a state where a compressive force is applied, and integrally rotated. Do. In FIG. 3, the same members as those described in FIG. 1 are given the same reference numerals, and the detailed description thereof is omitted here.

  FIG. 4 is a side view of the pendulum damper 40 described in FIG. 3 as viewed from the second cover member 13 side. As shown in FIG. 4, the rivets 41 on the outer circumferential side include rivets 41a, 41b,... Provided in plural at predetermined intervals in the circumferential direction. The rivets 42 on the inner circumferential side include rivets 42a, 42b,... Provided at predetermined intervals in the circumferential direction. Thereby, the vibration reduction device using the pendulum damper 40 can increase the connection rigidity of the housing 25. As a result, the resonance frequency of the housing 25 can be set higher than the lower order of rotation of the engine, for example, the frequency range of the primary component, and therefore, the dustproofness and waterproofness of the housing 25 can be improved.

  FIG. 5 shows another example of the vibration reducing device 50 according to the present invention. As shown in FIG. 5, the vibration reducing device 50 is mounted, for example, inside a torque converter, and includes an elastic damper 51 and a pendulum damper 52. The elastic damper 51 includes a flywheel 53, a primary side plate 54, a first secondary side plate 55, a second secondary side plate 56, a hub 57, and an elastic member 58. For example, vibration of torque output from the engine Is reduced using the elastic action of the elastic member 58. For example, a spring is used as the elastic member 58.

  The flywheel 53 is connected, for example, to an output shaft 59 of the engine, and rotates, for example, around the rotation shaft 60 of the output shaft 59 when a torque output from the engine is input. The hub 57 is splined to, for example, an output shaft 62 serving as an input shaft of a transmission, and is rotatably provided about a rotation center axis 63 of the output shaft 62. The rotation center shaft 63 is set coaxially with the rotation shaft 60. The primary side plate 54 is rotatably provided relative to the hub 57, is connected to the flywheel 53 on the outer peripheral side, and is integrally rotated with the flywheel 53. The first secondary side plate 55 and the second secondary side plate 56 are disposed on both sides of the primary side plate 54 with a predetermined gap therebetween, and the inner peripheral side is connected to the hub 57 to be integral with the hub 57 Is rotated.

  The elastic member 58 is engaged with the primary side plate 54 and the first secondary side plate 55 and the second secondary side plate 56. The engagement locations are provided at a plurality of locations in the circumferential direction with respect to the primary side plate 54 and the first secondary side plate 55 and the second secondary side plate 56. For example, in the case of using a spring as the elastic member 58, when the rotational speed of the primary side plate 54 increases or decreases with respect to the first secondary side plate 55 and the second secondary side plate 56, the primary side plate 54 The spring is arranged to be compressed in the circumferential direction by the engagement with the first secondary side plate 55 and the second secondary side plate 56.

  The pendulum damper 52 includes the first cover member 12, the second cover member 13, the rotating body 10, the rolling elements 17, the outer peripheral rivets 69, and the inner peripheral rivets 70. The second side plate 56 is attached. In FIG. 5, the same or similar members as or to those described with reference to FIG. 3 are assigned the same reference numerals and detailed explanations thereof will be omitted. The first cover member 12 and the second cover member 13 are disposed on both sides sandwiching the rotating body 10, and the first concave portion 14 and the second concave portion 15 constitute an accommodating portion 23 which accommodates the insertion hole 16 and the rolling element 17. . The rivet 69 on the outer peripheral side is a member to be fastened to the second cover member 13, the rotating body 10, the first cover member 12, the spacer 72, the second secondary plate 56 and the first secondary plate 55. As a result, a compression force along the axial direction is applied to the first member to be fastened. The spacer 72 is inserted between the first cover member 12 and the second secondary plate 56 to maintain a constant distance therebetween. A plurality of rivets 69 on the outer peripheral side are provided at predetermined intervals in the circumferential direction.

  In addition, in the primary side plate 54, a long hole 73 for escaping the rivet 69 on the outer peripheral side is formed to be elongated in the circumferential direction so that the compressive force by the rivet 69 on the outer peripheral side does not act. The length of the elongated holes 73 in the circumferential direction is a length that allows relative rotation between the primary side plate 54 and the first secondary side plate 55 and the second secondary side plate 56. The rivet 70 on the inner circumferential side fastens the first cover member 12, the rotating body 10 and the second cover member 13 as a second member to be fastened, and applies a compressive force along the axial direction to the second member to be fastened. Give. A plurality of rivets 70 on the inner circumferential side are provided at every angle corresponding to the distance between the rivets 69 on the outer circumferential side in the circumferential direction.

  For example, when the output shaft 59 is rotated by the driving force output from the engine, the flywheel 53 is rotated. The rotation of the flywheel 53 causes the primary plate 54 to rotate integrally with the flywheel 53. Further, by the elastic member 58 rotating with the primary side plate 54, the first secondary side plate 55 and the second secondary side plate 56 engaged with the elastic member 58 integrally rotate with the hub 57. . Thus, the driving force input to the flywheel 53 is transmitted to the output shaft 62 coupled to the hub 57. In the power transmission path during this time, the elastic member 58 interposed between the primary side plate 54 and the first secondary side plate 55 and the second secondary side plate 56 makes the torque output from the engine fluctuate. Absorbed

  Further, a pendulum damper 52 is attached to the first secondary side plate 55 and the second secondary side plate 56 which are output members of the elastic damper 51. The pendulum damper 52 reduces the torque vibration of the rotating member rotating integrally with the first secondary side plate 55 and the second secondary side plate 56 by rolling the rolling element 17. The rotating body member includes, for example, a rotating body constituting a transmission connected to the output shaft 59, the flywheel 53, the primary side plate 54, the output shaft 62 and the output shaft 62.

  In the embodiment described with reference to FIG. 5, since the rivet 41 for fixing the first secondary side plate 55 and the second secondary side plate 56 can be used together as the rivet for fixing the outer side plate 55, cost reduction and Become. Further, the first cover member 12, the rotating body 10 and the second cover member 13 are fastened to the first secondary side plate 55 and the second secondary side plate 56 by rivets 69 on the outer peripheral side. Therefore, centering work of the first cover member 12, the rotating body 10 and the second cover member 13 with respect to the first secondary side plate 55 and the second secondary side plate 56 can be easily performed.

  FIG. 6 shows another example of the vibration reducing device 80 according to the present invention. As shown in FIG. 6, in the vibration reduction device 80, compared to the vibration reduction device 50 described in FIG. 5, the first fastened member is fastened by the rivet 81 on the inner peripheral side with respect to the housing portion 23, The rivets 81 on the circumferential side apply a compressive force to the first member to be fastened. Further, the second fastened member is fastened by the bolt and nut fastening body 82 on the outer circumferential side with respect to the housing portion 23, and the outer side bolt and nut fastening body 82 exerts a compressive force on the second fastened member. Granted. In FIG. 6, members that are the same as or similar to the members described in FIG. 5 are given the same reference numerals, and detailed description thereof is omitted here.

  A pendulum damper 52 is integrally attached to the first secondary side plate 55 and the second secondary side plate 56 as output members of the elastic damper 51 by rivets 81 on the inner peripheral side. The pendulum damper 52 reduces torque vibration transmitted from a rotating member that rotates integrally with the first secondary side plate 55 and the second secondary side plate 56 by rolling the rolling element 17. Let The rotating member includes, for example, a transmission connected to the output shaft 59, the flywheel 53, the primary side plate 54, the output shaft 62, and the output shaft 62.

  In the embodiment described with reference to FIG. 6, since the rivet for fixing the first secondary side plate 55 and the second secondary side plate 56 can also be used as the inner peripheral rivet 81, cost can be reduced. It becomes. Further, the first cover member 12, the rotating body 10 and the second cover member 13 are fastened to the first secondary side plate 55 and the second secondary side plate 56 by rivets 81 on the inner peripheral side. Therefore, centering work of the first cover member 12, the rotating body 10 and the second cover member 13 with respect to the first secondary side plate 55 and the second secondary side plate 56 can be easily performed.

  As mentioned above, although demonstrated based on the Example, this invention is not limited to the Example mentioned above, A various change is added and implemented within the range which does not deviate from the meaning. For example, in each of the above embodiments, the first secondary plate 55, the second secondary plate 56, the first cover member 12, the rotating body 10, and the second cover member 13 37, 82 and rivets 41, 42, 69, 70, 81, etc. However, in the present invention, not limited to the fastening member, for example, spot welding may be used instead of the fastening member. Further, the vibration reducing device in the present invention may be used for a fluid transmission or a fluid coupling other than a torque converter having a torque amplification action.

  9, 40: pendulum damper, 10: rotating body, 17: rolling element, 12, 13: cover member, 25-30: through hole, 26, 28: outer peripheral tongue piece, 27, 29: inner peripheral tongue piece Part, 50, 80 ... Vibration reduction device.

Claims (3)

A rolling element for vibration damping that reciprocates in the rotational direction of the rotating body due to the fluctuation of the torque is held by the rotating body that receives torque and rotates, and a region where the rolling element reciprocates does not contact the rolling element in dynamic reduction apparatus vibration and a pendulum damper that is attached to the cover the rotating body covering as,
The cover includes a first cover member attached to one side surface of the rotating body, and a second cover member attached to the other side surface of the rotating body,
The first cover member and the second cover member each have an outer peripheral tongue piece extending outward in the radial direction of the rotating body from the area in which the rolling element reciprocates, and the area in which the rolling element reciprocates And an inner peripheral tongue portion extending inward in the radial direction of the rotating body,
The outer peripheral tongue portion and the inner peripheral tongue portion of the first cover member are pressed against the one surface of the rotating body and fastened to the rotating body, and
The outer peripheral tongue portion and the inner peripheral tongue portion of the second cover member are pressed against the other surface of the rotating body and fastened to the rotating body,
It said first cover member and the second cover member, the vibration reduction device, characterized in that attached to the rotating body while covering the front SL region.
  In the vibration reducing device according to claim 1,
  Through holes aligned on the same axis are formed in the outer peripheral tongue in the first cover member and in the outer peripheral tongue in the second cover member and the rotor.
  The outer peripheral tongue portion of the first cover member and the outer peripheral tongue portion of the second cover member are fastened to the rotating body by the fastening member inserted into the through hole.
  Other through holes aligned on the same axis are formed in the inner peripheral tongue portion in the first cover member and the inner peripheral tongue portion in the second cover member and the rotary body,
  By the other fastening member inserted in the other through hole, the inner peripheral tongue piece portion of the first cover member and the inner peripheral tongue piece portion of the second cover member are fastened to the rotating body. Are
Vibration reduction device characterized by.
In the vibration reduction device according to claim 2 ,
An elasticity in which a primary side plate to which a torque is input and a secondary side plate rotatable relative to the primary side plate face in a relative rotational direction between the primary side plate and the secondary side plate It further comprises an elastic damper connected via an elastic body that generates a force,
Wherein the fastening member is also properly to the outer tongue in each are fastened to the rotating body of the first cover member and the second cover member is said in each of the first cover member and the second cover member side tongue SL before being fastened to the rotating body portion other concluding member, said through said secondary plate in elastic damper, said first cover member and said second cover member and the rotation A vibration reducing device characterized in that a body is connected to the secondary side plate.

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