JP2018112294A - Damper device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a damper device which can suppress, for example, the elongation of a time up to a start of the attenuation of a rotation variation.SOLUTION: This damper device comprises: a rotating body which can rotate around a rotation center; a support member protruding to an axial direction of the rotation center from the rotating body; a first oscillation body which has a side face oriented to the rotating body, and has a first opening which is opened at the side face, and in which the support member is accommodated, and which can relatively move in a peripheral direction of a first oscillation center with respect to the rotating body so that the support member moves in the first opening; and a bearing part which is interposed between an inner face of the first opening and a first surface of the support member oriented to the inner face of the first opening, and lower in resistance with respect to the movement of the first oscillation body in a contact state than that of the first surface.SELECTED DRAWING: Figure 2

Description

  Embodiments described herein relate generally to a damper device.

  Conventionally, a damper device provided between an output side of rotation such as an engine and an input side such as a transmission is known. The damper device attenuates the rotational fluctuation generated in the rotation on the output side and transmits the rotation to the input side.

  Further, as a configuration that can be used for the damper device, a configuration is known in which a mass body capable of relative motion in a pendulum (oscillation) manner is disposed on a support. The mass body can attenuate the rotational fluctuation of the support body by moving relative to the rotating support body (Patent Document 1).

Special table 2013-515214 gazette

  However, in the conventional configuration, the mass body may move to a position biased with respect to the support body, for example, by gravity before the engine is started. The damper device first returns to a position where the mass body can start swinging, and the mass body swings from the position, thereby attenuating rotational fluctuations.

  The mass body moves with respect to the support body when the rolling element that supports the mass body rolls on a traveling track provided in the mass body. However, due to the resistance such as friction between the mass body and the rolling element, it may take a long time to return from the position where the mass body is biased to the position where swinging can be started.

  In view of the above, the present invention has been made in view of the above, and provides a damper device capable of suppressing an increase in the time until the rotational fluctuation starts to be attenuated.

  A damper device according to an embodiment of the present invention includes, as an example, a rotating body that can rotate around a rotation center, a support member that protrudes from the rotating body in the axial direction of the rotation center, and a side surface that faces the rotating body. A first opening that opens on the side surface and that accommodates the support member; and a first swing center with respect to the rotating body so that the support member moves in the first opening. Between the first rocking body relatively movable in the circumferential direction, the inner surface of the first opening, and the first surface of the support member facing the inner surface of the first opening. And a bearing portion having a resistance to movement in the contact state of the first rocking body smaller than that of the first surface. Therefore, as an example, when the rotating body rotates from a state where the first rocking body is disposed at a position deviated with respect to the rotating body, a bearing portion is provided, so that the first rocking body is It is possible to move in a short time to a position that can swing with respect to the rotating body such that the support member is located in the center of the opening. Therefore, it is suppressed that the time until the damper device starts to attenuate the rotational fluctuation is lengthened.

  In the damper device, as an example, the bearing portion is a rolling bearing. Therefore, as an example, the outer ring of the rolling bearing that supports the inner surface of the first opening of the first rocking body rotates smoothly with respect to the inner ring of the rolling bearing that is supported by the first surface of the support member. That is, since the rolling resistance between the outer ring of the rolling bearing and the inner surface of the first opening of the first oscillating body is small, the first oscillating body can move smoothly with respect to the support member. Therefore, the first oscillating body can be moved to a position where the first oscillating body can oscillate with respect to the rotating body in a short time, and the time until the damper device starts to attenuate the rotational fluctuation is suppressed.

  In the damper device, as an example, the friction coefficient of the bearing portion is lower than the friction coefficient of the first surface. Therefore, as an example, a slip occurs between the inner surface of the first opening of the first oscillating body and the bearing portion, so that the first oscillating body can be oscillated with respect to the rotating body in a short time. Thus, the time until the damper device starts to attenuate the rotational fluctuation is suppressed.

  In the damper device, as an example, the bearing portion includes a cylindrical portion interposed between the inner surface of the first opening and the first surface, a protruding portion from the cylindrical portion, and the support member in the axial direction. A wall portion positioned between the first rocking body and the first rocking body. Therefore, as an example, it is possible to suppress the first oscillating body from contacting the support member in the axial direction and causing friction between the first oscillating body and the support member. Therefore, the first oscillating body can be moved to a position where the first oscillating body can oscillate with respect to the rotating body in a short time, and the time until the damper device starts to attenuate the rotational fluctuation is suppressed.

  As an example, the damper device is provided with a second opening in which the support member is accommodated, and is positioned between the support member and the first oscillator in the axial direction. A second oscillating body movable relative to the rotating body in the circumferential direction of the second oscillating center so that the support member moves; and the bearing portion includes the first oscillating body. A first tube portion interposed between an inner surface of the opening and the first surface, and an inner surface of the second opening and a second surface of the support member facing the inner surface of the second opening. A second cylindrical portion interposed therebetween, and a step portion connecting the first cylindrical portion and the second cylindrical portion and facing the side surface of the first oscillator. Therefore, as an example, the first oscillating body and the second oscillating body slide with respect to the bearing portion independently of each other and can oscillate with respect to the rotating body. Further, the step portion of the bearing portion faces the side surface of the first oscillator. Thereby, it is suppressed that the 1st rocking body contacts a support member in the direction of an axis, and friction arises between the 1st rocking body and a support member. Therefore, the first oscillating body can be moved to a position where the first oscillating body can oscillate with respect to the rotating body in a short time, and the time until the damper device starts to attenuate the rotational fluctuation is suppressed.

FIG. 1 is a front view schematically showing an example of a damper device according to the first embodiment. FIG. 2 is a cross-sectional view showing a part of an example of the damper device of the first embodiment along the line F2-F2 of FIG. FIG. 3 is a front view schematically showing an example of the damper device in a state where the engine of the first embodiment is stopped. FIG. 4 is a cross-sectional view illustrating a part of an example of the damper device according to the second embodiment. FIG. 5 is a cross-sectional view illustrating a part of an example of a damper device according to the third embodiment. FIG. 6 is a cross-sectional view showing a part of an example of a damper device according to the fourth embodiment. FIG. 7 is a front view schematically showing a part of an example of a damper device according to the fifth embodiment. FIG. 8 is a cross-sectional view illustrating a part of an example of the damper device according to the fifth embodiment.

(First embodiment)
A first embodiment will be described below with reference to FIGS. 1 to 3. In the present specification, a plurality of expressions may be described for the constituent elements according to the embodiment and the description of the elements. The constituent elements and descriptions in which a plurality of expressions are made may be other expressions that are not described. Further, the constituent elements and descriptions that are not expressed in a plurality may be expressed in other ways that are not described.

  FIG. 1 is a front view schematically showing an example of a damper device 1 according to the first embodiment. FIG. 2 is a cross-sectional view showing a part of an example of the damper device 1 according to the first embodiment along the line F2-F2 of FIG.

  As shown in FIGS. 1 and 2, the damper device 1 includes a pendulum holding member 2, a first centrifugal pendulum 3, a second centrifugal pendulum 4, four support pins 5, and four support bearings 6. And a plurality of stoppers 7 and a plurality of first sliding members 8. The pendulum holding member 2 is an example of a rotating body. The support pin 5 is an example of a support member, and may be referred to as a roller or a rolling element, for example. The first sliding member 8 is an example of a bearing portion.

  The pendulum holding member 2 is rotatable around the central axis Ax1 shown in FIG. The center axis Ax1 is an example of the center of rotation. Hereinafter, a direction orthogonal to the central axis Ax1 is referred to as a radial direction of the central axis Ax1, a direction along the central axis Ax1 is referred to as an axial direction of the central axis Ax1, and a direction rotating around the central axis Ax1 is referred to as a circumferential direction of the central axis Ax1.

  The pendulum holding member 2 is made of, for example, a metal such as iron and is formed in a disk shape that spreads in the radial direction of the central axis Ax1. The pendulum holding member 2 may be made of other materials. The pendulum holding member 2 is, for example, a driven plate of a flywheel damper connected to an engine crankshaft. The pendulum holding member 2 is not limited to the engine, and may be connected to another drive source such as a motor or another device such as an input shaft of a transmission in an object used with the engine.

  The crankshaft extends along the central axis Ax1. When the engine rotates the crankshaft, for example, the crankshaft rotates the pendulum holding member 2 via a coil spring. That is, the rotation generated by the engine is transmitted to the pendulum holding member 2.

  As shown in FIG. 1, the pendulum holding member 2 has a connection portion 21 located at the center portion of the pendulum holding member 2 and a first side surface 22. Furthermore, as shown in FIG. 2, the pendulum holding member 2 has a second side surface 23.

  The first side surface 22 is a surface facing toward one side (right side in FIG. 2) in the axial direction of the central axis Ax1. In other words, the first side surface 22 is orthogonal to the central axis Ax1. The first side surface 22 is formed substantially flat. In addition, the 1st side 22 may have an unevenness | corrugation and the part which inclines with respect to the radial direction of central axis Ax1.

  As shown in FIG. 2, the second side surface 23 is a surface facing the other side in the axial direction of the central axis Ax1 (left side in FIG. 2). In other words, the second side surface 23 is located on the opposite side of the first side surface 22. The second side surface 23 is formed substantially flat and is orthogonal to the central axis Ax1. Note that the second side surface 23 may have irregularities or a portion inclined with respect to the radial direction of the central axis Ax1.

  Four support holes 24 are provided in the pendulum holding member 2. The support hole 24 is located near the outer periphery of the pendulum holding member 2. The support hole 24 extends in the axial direction of the central axis Ax1 and opens on the first side surface 22 and the second side surface 23. As shown in FIG. 1, the four support holes 24 are spaced apart from each other in the circumferential direction of the central axis Ax1.

  As shown in FIG. 2, the first centrifugal pendulum 3 includes a first swing member 31 on the right side in FIG. 2, a second swing member 32 on the left side in FIG. 2, and a plurality of rivets 33. . The first swing member 31 is an example of a first swing body.

  The first swing member 31 is formed in a substantially arc-like plate shape extending in the circumferential direction of the central axis Ax1. The shape of the first swing member 31 is not limited to this. The first swing member 31 has a first inner surface 31a. The first inner side surface 31a is an example of a side surface.

  The first inner side surface 31 a faces the first side surface 22 of the pendulum holding member 2 at a position separated from the pendulum holding member 2. That is, the first rocking member 31 and the pendulum holding member 2 are arranged side by side in the axial direction of the central axis Ax1 with a space therebetween.

  Two first grooves 31 b are provided in the first swing member 31. The first groove 31b is an example of a first opening. The first groove 31b is a hole that extends in the axial direction of the central axis Ax1 and opens to the first inner surface 31a. The first groove 31b may penetrate the first swing member 31 in the axial direction of the central axis Ax1 or may be a hole with a bottom.

  As shown in FIG. 1, the first groove 31b extends in a curved shape so as to approach the central axis Ax1 as it approaches the central portion from both ends. In other words, the first groove 31b is formed in a substantially U shape that curves toward the inner side in the radial direction of the central axis Ax1.

  The second swing member 32 shown in FIG. 2 has substantially the same shape as the first swing member 31. That is, the second swing member 32 is formed in a substantially arc-like plate shape extending in the circumferential direction of the central axis Ax1. The shape of the second swing member 32 is not limited to this. The second swing member 32 has a second inner surface 32a.

  The second inner side surface 32 a faces the second side surface 23 of the pendulum holding member 2 at a position separated from the pendulum holding member 2. In other words, the second swing member 32 and the pendulum holding member 2 are arranged side by side in the axial direction of the central axis Ax1 with a space therebetween. The pendulum holding member 2 is disposed between the first swing member 31 and the second swing member 32 in the axial direction of the central axis Ax1.

  The second swing member 32 is provided with two second grooves 32b. The second groove 32b is a hole that extends in the axial direction of the central axis Ax1 and opens to the second inner surface 32a. Similar to the first groove 31b, the second groove 32b extends in a curved shape so as to approach the central axis Ax1 as it approaches the center from both ends.

  The rivet 33 is inserted into the insertion hole 25 provided in the pendulum holding member 2 and connects the first swing member 31 and the second swing member 32 to each other. The insertion hole 25 extends in the axial direction of the central axis Ax <b> 1 and opens to the first side surface 22 and the second side surface 23.

  Similar to the first and second grooves 31b and 32b, the insertion hole 25 extends in a curved shape so as to approach the central axis Ax1 as it approaches the central portion from both ends. The width of the insertion hole 25 is larger than the shaft diameter of the rivet 33. For this reason, the rivet 33 is movable along the insertion hole 25.

  The rivet 33 restricts the relative movement of the first swing member 31 and the second swing member 32. By inserting the rivet 33 through the insertion hole 25, the first centrifugal pendulum 3 is attached to the pendulum holding member 2 so as to be movable relative to the pendulum holding member 2.

  As shown in FIG. 2, the second centrifugal pendulum 4 includes a third swing member 41 on the right side of FIG. 2 and a fourth swing member 42 on the left side of FIG. 2. The third swing member 41 is an example of a second swing body.

  The third swing member 41 is formed in a substantially arc-like plate shape extending in the circumferential direction of the central axis Ax1. The shape of the third swing member 41 is not limited to this. At least a part of the third swing member 41 is located between the pendulum holding member 2 and the first swing member 31 in the axial direction of the central axis Ax1. In other words, the third oscillating member 41, the first oscillating member 31, and the pendulum holding member 2 are arranged side by side in the axial direction of the central axis Ax1 with a space therebetween.

  The third rocking member 41 has a third inner side surface 41a and a first outer side surface 41b. The third inner side surface 41 a faces the first side surface 22 of the pendulum holding member 2 at a position separated from the pendulum holding member 2. The first outer surface 41b is located on the opposite side of the third inner surface 41a. The first outer surface 41 b faces the first inner surface 31 a of the first swing member 31 at a position spaced from the first swing member 31.

  Two third grooves 41 c are provided in the third swing member 41. The third groove 41c is an example of a second opening. The third groove 41c is a hole that extends in the axial direction of the central axis Ax1 and opens to the third inner surface 41a and the first outer surface 41b.

  As shown in FIG. 1, the third groove 41 c extends in a curved shape so as to approach the central axis Ax1 as it approaches the central portion from both ends. In other words, the third groove 41c is formed in a substantially U-shape that curves inward in the radial direction of the central axis Ax1.

  The fourth swing member 42 shown in FIG. 2 has substantially the same shape as the third swing member 41. That is, the fourth rocking member 42 is formed in a substantially arc-like plate shape extending in the circumferential direction of the central axis Ax1. The shape of the fourth swing member 42 is not limited to this.

  At least a part of the fourth swing member 42 is located between the pendulum holding member 2 and the second swing member 32 in the axial direction of the central axis Ax1. In other words, the fourth swing member 42, the second swing member 32, and the pendulum holding member 2 are arranged side by side in the axial direction of the central axis Ax1 with a space therebetween.

  The fourth rocking member 42 has a fourth inner surface 42a and a second outer surface 42b. The fourth inner side surface 42 a faces the second side surface 23 of the pendulum holding member 2 at a position separated from the pendulum holding member 2. The second outer surface 42b is located on the opposite side of the fourth inner surface 42a. The second outer surface 42 b faces the second inner surface 32 a of the second rocking member 32 at a position separated from the second rocking member 32.

  Two fourth grooves 42 c are provided in the fourth swing member 42. The fourth groove 42c is a hole that extends in the axial direction of the central axis Ax1 and opens to the fourth inner side surface 42a and the second outer side surface 42b. Similar to the third groove 41c, the fourth groove 42c extends in a curved shape so as to approach the central axis Ax1 as it approaches the central portion from both ends.

  The third swing member 41 and the fourth swing member 42 are connected to each other by rivets, for example, like the first and second swing members 31 and 32. The rivet restricts the relative movement of the third rocking member 41 and the fourth rocking member 42 and is inserted into a hole provided in the pendulum holding member 2. Thereby, the second centrifugal pendulum 4 is attached to the pendulum holding member 2 so as to be movable relative to the pendulum holding member 2.

  The first centrifugal pendulum 3 and the second centrifugal pendulum 4 are made of, for example, a metal such as iron. Each of the first centrifugal pendulum 3 and the second centrifugal pendulum 4 may be made of other materials. The mass of the first centrifugal pendulum 3 and the mass of the second centrifugal pendulum 4 are substantially equal.

  Each of the four support pins 5 is formed in a substantially cylindrical shape extending in the axial direction of the central axis Ax1. The support pin 5 is made of a metal such as iron, for example. The support pin 5 may be made of other materials. Each of the support pins 5 includes two first support portions 51, two second support portions 52, and a third support portion 53.

  The first support portions 51 are provided at both end portions of the support pin 5 in the axial direction of the central axis Ax1, and are formed in a columnar shape extending in the axial direction of the central axis Ax1. The first support portion 51 has a first surface 51a. The first surface 51a is a cylindrical surface facing the direction orthogonal to the rotation axis Ax2 of the support pin 5 (the radial direction of the rotation axis Ax2). The rotation axis Ax2 is the central axis of the support pin 5, and is provided substantially parallel to the central axis Ax1.

  One first support portion 51 is inserted into the first groove 31 b of the first swing member 31. In other words, one first support portion 51 is accommodated in the first groove 31b. The shaft diameter of the first support portion 51 is smaller than the width of the first groove 31b. The 1st surface 51a of the 1st support part 51 faces the inner surface 31c of the 1st groove | channel 31b through a space | interval.

  The other first support portion 51 is inserted into the second groove 32 b of the second swing member 32. In other words, the other first support portion 51 is accommodated in the second groove 32b. The shaft diameter of the first support portion 51 is smaller than the width of the second groove 32b. The 1st surface 51a of the 1st support part 51 faces the inner surface 32c of the 2nd groove | channel 32b through a space | interval.

  The two second support parts 52 are respectively provided between the first support part 51 and the third support part 53. That is, two second support parts 52 and a third support part 53 are provided between the two first support parts 51, and the third support part 53 is provided between the two second support parts 52. Is provided.

  The second support portion 52 is formed in a columnar shape extending in the axial direction of the central axis Ax1. The second support portion 52 has a second surface 52a. The second surface 52a is a cylindrical surface facing the radial direction of the rotation axis Ax2 of the support pin 5.

  One second support portion 52 is inserted into the third groove 41 c of the third swing member 41. In other words, one second support portion 52 is accommodated in the third groove 41c. The shaft diameter of the second support portion 52 is smaller than the width of the third groove 41c. The 2nd surface 52a of the 2nd support part 52 faces the inner surface 41d of the 3rd groove | channel 41c through a space | interval.

  The other second support portion 52 is inserted into the fourth groove 42 c of the fourth swing member 42. In other words, the other second support portion 52 is accommodated in the fourth groove 42c. The shaft diameter of the second support portion 52 is smaller than the width of the fourth groove 42c. The 2nd surface 52a of the 2nd support part 52 faces the inner surface 42d of the 4th groove | channel 42c through a space | interval.

  The shaft diameter of the second support portion 52 is larger than the shaft diameter of the first support portion 51. For this reason, the end surface 52 b is provided on the second support portion 52. The end surface 52b connects the first surface 51a and the second surface 52a and faces the axial direction of the central axis Ax1.

  The third support portion 53 is formed in a columnar shape extending in the axial direction of the central axis Ax1. The third support portion 53 has a third surface 53a. The third surface 53a is a cylindrical surface facing the radial direction of the rotation axis Ax2 of the support pin 5.

  The third support portion 53 is inserted through the support hole 24 of the pendulum holding member 2. The shaft diameter of the third support portion 53 is smaller than the inner diameter of the support hole 24. The 3rd surface 53a of the 3rd support part 53 faces the inner surface 24a of the support hole 24 through a space | interval.

  Two attachment grooves 53 b are provided in the third support portion 53. The mounting groove 53b is a bottomed groove that is provided on the third surface 53a and extends in the direction of rotation around the rotation axis Ax2 (the circumferential direction of the rotation axis Ax2). The two mounting grooves 53b are separated from each other in the axial direction of the central axis Ax1.

  The support bearing 6 is interposed between the third surface 53 a of the third support portion 53 and the inner surface 24 a of the support hole 24 of the pendulum holding member 2. The support bearing 6 is a ball bearing, and supports the support pin 5 on the pendulum holding member 2 so as to be rotatable around the rotation axis Ax2. The support bearing 6 may be another radial bearing such as a roller bearing or a slide bearing. Further, the support pin 5 may be directly attached to the pendulum holding member 2 without the support bearing 6 or may be formed integrally with the pendulum holding member 2.

  Since the support pin 5 is supported by the pendulum holding member 2 via the support bearing 6, one of the first and second support portions 51 and 52 is centered from the first side surface 22 of the pendulum holding member 2. It protrudes in the axial direction of the axis Ax1. Further, the other first and second support portions 51 and 52 protrude from the second side surface 23 of the pendulum holding member 2 in the axial direction of the central axis Ax1.

  The stopper 7 is a C-type retaining ring, for example, and is attached to the attachment groove 53 b of the third support portion 53. The stopper 7 protrudes from the third surface 53a of the third support portion 53 in the radial direction of the rotation axis Ax2.

  The support bearing 6 is located between the two stoppers 7 in the axial direction of the central axis Ax1. Thereby, the support pin 5 is restricted from moving in the axial direction of the central axis Ax1 with respect to the support bearing 6 and the pendulum holding member 2.

  Each of the plurality of first sliding members 8 is made of a synthetic resin such as polyetheretherketone (PEEK) or polytetrafluoroethylene (PTFE), and has a substantially cylindrical shape. The first sliding member 8 may be made of other materials such as metal. Each of the first sliding members 8 includes a first cylinder part 81, a second cylinder part 82, a step part 83, and a flange part 84.

  The first tube portion 81 is formed in a cylindrical shape and is attached to the first support portion 51 of the support pin 5. In other words, the first support portion 51 is fitted inside the first cylindrical portion 81. Therefore, the first cylindrical portion 81 of one (one) first sliding member 8 includes an inner surface 31c of the first groove 31b of the first swing member 31 and one first support portion. It is interposed between the first surface 51a of 51. Further, the first cylindrical portion 81 of the other one (the other) first sliding member 8 includes the inner surface 32c of the second groove 32b of the second swinging member 32 and the other first support. It is interposed between the first surface 51a of the part 51.

  The 1st cylinder part 81 has the 1st inner peripheral surface 81a and the 1st outer peripheral surface 81b. The first inner peripheral surface 81 a is in contact with the first surface 51 a of the first support portion 51. The first outer peripheral surface 81b is located on the opposite side of the first inner peripheral surface 81a.

  The first outer peripheral surface 81 b of one first sliding member 8 faces the inner surface 31 c of the first groove 31 b of the first swing member 31. The first outer peripheral surface 81 b contacts the inner surface 31 c of the first groove 31 b and supports the first swing member 31. The shaft diameter of the first cylindrical portion 81 is smaller than the width of the first groove 31b. For this reason, the 1st cylinder part 81 can move the inside of the 1st groove | channel 31b.

  The first outer peripheral surface 81 b of the other first sliding member 8 faces the inner surface 32 c of the second groove 32 b of the second swing member 32. The first outer peripheral surface 81b is in contact with the inner surface 32c of the second groove 32b and supports the second swing member 32. The shaft diameter of the first cylinder portion 81 is smaller than the width of the second groove 32b. For this reason, the 1st cylinder part 81 can move the inside of the 2nd groove | channel 32b.

  The second cylinder portion 82 is formed in a cylindrical shape and is attached to the second support portion 52 of the support pin 5. In other words, the second support portion 52 is fitted inside the second cylindrical portion 82. For this reason, the second cylindrical portion 82 of one first sliding member 8 includes the inner surface 41 d of the third groove 41 c of the third swing member 41 and the second second support portion 52. It is interposed between the surface 52a. The second cylindrical portion 82 of the other first sliding member 8 includes the inner surface 42d of the fourth groove 42c of the fourth swing member 42 and the second second support portion 52 of the second second support portion 52. It is interposed between the surface 52a.

  The 2nd cylinder part 82 has the 2nd inner peripheral surface 82a and the 2nd outer peripheral surface 82b. The second inner peripheral surface 82 a is in contact with the second surface 52 a of the second support portion 52. The second outer peripheral surface 82b is located on the opposite side of the second inner peripheral surface 82a.

  The second outer peripheral surface 82 b of the first sliding member 8 faces the inner surface 41 d of the third groove 41 c of the third swing member 41. The second outer peripheral surface 82 b contacts the inner surface 41 d of the third groove 41 c and supports the third swing member 41. The shaft diameter of the second cylindrical portion 82 is smaller than the width of the third groove 41c. For this reason, the 2nd cylinder part 82 can move the inside of the 3rd groove | channel 41c.

  The second outer peripheral surface 82 b of the other first sliding member 8 faces the inner surface 42 d of the fourth groove 42 c of the fourth swing member 42. The second outer peripheral surface 82b is in contact with the inner surface 42d of the fourth groove 42c and supports the fourth swing member 42. The shaft diameter of the second cylindrical portion 82 is smaller than the width of the fourth groove 42c. For this reason, the 2nd cylinder part 82 can move the inside of the 4th groove | channel 42c.

  The step portion 83 connects one end portion of the first cylindrical portion 81 and one end portion of the second cylindrical portion 82 in the axial direction of the central axis Ax1. The step portion 83 is in contact with the end surface 52 b of the second support portion 52. Thereby, the relative movement of the 1st sliding member 8 with respect to the support pin 5 in the axial direction of center axis Ax1 is restrict | limited.

  The step portion 83 of the first sliding member 8 faces the first inner surface 31 a of the first swing member 31. The step portion 83 may be in contact with the first inner side surface 31a or may be separated from the first inner side surface 31a.

  The step portion 83 of the other first sliding member 8 faces the second inner surface 32 a of the second swing member 32. The step portion 83 may be in contact with the second inner side surface 32a or may be separated from the second inner side surface 32a.

  The shaft diameter of the second cylindrical portion 82 is larger than the width of the first groove 31 b of the first rocking member 31 and larger than the width of the second groove 32 b of the second rocking member 32. For this reason, it is suppressed that the 2nd cylinder part 82 enters into the 1st and 2nd groove | channels 31b and 32b, and the step part 83 faces the 1st inner surface 31a or the 2nd inner surface 32a more reliably. .

  The flange portion 84 protrudes from the other end portion of the second cylindrical portion 82 in the radial direction of the rotation axis Ax2. The flange portion 84 is formed in an annular shape extending in the radial direction of the rotation axis Ax2. Instead of the flange portion 84, for example, a protrusion protruding in the radial direction of the rotation axis Ax2 may be provided.

  One flange portion 84 of the first sliding member 8 faces the third inner surface 41 a of the third swing member 41. The flange portion 84 may be in contact with the third inner side surface 41a or may be separated from the third inner side surface 41a. The flange portion 84 is located between the pendulum holding member 2 and the third swing member 41 in the axial direction of the central axis Ax1.

  The flange portion 84 of the other first sliding member 8 faces the fourth inner surface 42 a of the fourth swing member 42. The flange portion 84 may be in contact with the fourth inner side surface 42a or may be separated from the fourth inner side surface 42a. The flange portion 84 is located between the pendulum holding member 2 and the fourth swing member 42 in the axial direction of the central axis Ax1.

  The diameter of the flange portion 84 is larger than the width of the third groove 41 c of the third rocking member 41 and larger than the width of the fourth groove 42 c of the fourth rocking member 42. For this reason, it is suppressed that the flange part 84 enters into the 3rd and 4th groove | channels 41c and 42c, and the flange part 84 faces the 3rd inner surface 41a or the 4th inner surface 42a more reliably.

  The friction coefficient of the first sliding member 8 made of PEEK or PTFE is lower than the friction coefficient of the first surface 51 a of the support pin 5. Specifically, the coefficient of static friction between the first outer peripheral surface 81 b of the first sliding member 8 and the first or second swinging member 31, 32 is the same as that of the first surface 51 a of the support pin 5. The coefficient of static friction with the first or second rocking member 31, 32 is lower.

  Further, the friction coefficient of the first sliding member 8 is lower than the friction coefficient of the second surface 52 a of the support pin 5. Specifically, the coefficient of static friction between the second outer peripheral surface 82b of the first sliding member 8 and the third or fourth rocking member 41, 42 is the same as that of the second surface 52a of the support pin 5 and the second surface 52a. The coefficient of static friction with the third or fourth rocking member 41, 42 is lower.

  In addition, the static friction coefficients of the first inner peripheral surface 81 a, the second inner peripheral surface 82 a, the step portion 83, and the flange portion 84 are lower than the static friction coefficient of the first surface 51 a of the support pin 5. And the coefficient of static friction of the second surface 52a is lower.

  The support pin 5 to which the first sliding member 8 is attached can roll along the first to fourth grooves 31b, 32b, 41c, and 42c in which the support pin 5 is accommodated. In other words, the support pin 5 to which the first sliding member 8 is attached can rotate inside the first to fourth grooves 31b, 32b, 41c, and 42c.

  As indicated by an arrow in FIG. 1, the first centrifugal pendulum 3 can swing (reciprocate) relative to the pendulum holding member 2 in the circumferential direction of the first swing center C <b> 1. The first oscillation center C1 is a central axis of oscillation of the first centrifugal pendulum 3 that extends parallel to the central axis Ax1. The first swing center C1 is located between the center axis Ax1 and the center of gravity of the first centrifugal pendulum 3 in the radial direction of the center axis Ax1. The first swing center C1 is not limited to this.

  For example, when the support pin 5 rolls along the first and second grooves 31 b and 32 b, the first and second swing members 31 and 32 have the first swing center with respect to the pendulum holding member 2. It swings relatively in the circumferential direction of C1. According to another expression, the first and second swinging members 31 and 32 are relative to the pendulum holding member 2 such that the support pin 5 moves in the first and second grooves 31b and 32b. It moves relatively in the circumferential direction of the first swing center C1. The circumferential direction of the first swing center C1 is a direction that intersects the radial direction of the central axis Ax1.

  Since the rivet 33 connects the first swing member 31 and the second swing member 32, the first and second swing members 31, 32 can swing integrally. The insertion hole 25 through which the rivet 33 is inserted extends along the tracks of the swinging first and second swinging members 31, 32, and the first and second swinging members 31, 32 are smooth. It can swing. The first and second swinging members 31 and 32 may be swingable relative to the pendulum holding member 2 individually.

  The second centrifugal pendulum 4 can swing (reciprocate) relative to the pendulum holding member 2 in the circumferential direction of the second swing center C2. The second oscillation center C2 is a central axis of oscillation of the second centrifugal pendulum 4 that extends parallel to the central axis Ax1. The second swing center C2 is located between the center axis Ax1 and the center of gravity of the second centrifugal pendulum 4 in the radial direction of the center axis Ax1. The second swing center C2 is not limited to this.

  For example, when the support pin 5 rolls along the third and fourth grooves 41 c and 42 c, the third and fourth swing members 41 and 42 move to the second swing center with respect to the pendulum holding member 2. It swings relatively in the circumferential direction of C2. According to another expression, the third and fourth swinging members 41 and 42 are in relation to the pendulum holding member 2 so that the support pin 5 moves in the third and fourth grooves 41c and 42c. It moves relatively in the circumferential direction of the second swing center C2. The circumferential direction of the second swing center C2 is a direction that intersects the radial direction of the central axis Ax1.

  Since the third swing member 41 and the fourth swing member 42 are connected by rivets, the third and fourth swing members 41 and 42 can swing integrally. The third and fourth swing members 41 and 42 may be swingable relative to the pendulum holding member 2 individually.

  The damper device 1 further includes a third centrifugal pendulum 11 and a fourth centrifugal pendulum 12 indicated by a two-dot chain line in FIG. The third centrifugal pendulum 11 is substantially the same as the first centrifugal pendulum 3. The fourth centrifugal pendulum 12 is substantially the same as the second centrifugal pendulum 4. Similarly to the first and second centrifugal pendulums 3 and 4, the third and fourth centrifugal pendulums 11 and 12 are also relatively movable with respect to the pendulum holding member 2 in the circumferential direction of the respective swing centers. .

When the pendulum holding member 2 rotates about the central axis Ax1, the first to fourth centrifugal pendulums 3, 4, 11, and 12 are formed in a pendulum shape relative to the pendulum holding member 2 due to inertial force and centrifugal force. Swing. In the radial direction of the central axis Ax1, the distance between the central axis Ax1 and the first swing center C1 is R, and the distance between the first swing center C1 and the center of gravity of the first centrifugal pendulum 3 is L. And the rotational speed of the pendulum holding member 2 is ω. In this case, the natural angular frequency (resonance frequency) ω _n of the oscillating first centrifugal pendulum 3 is expressed by the following equation (Equation 1).

As in the equation (1), the natural angular frequency ω _n of the first centrifugal pendulum 3 varies depending on the rotational speed ω of the pendulum holding member 2. The natural angular frequency ω _{n of} the second to fourth centrifugal pendulums 4, 11 and 12 can be obtained similarly. When the first to fourth centrifugal pendulums 3, 4, 11, and 12 are swung, the damper device 1 can move the engine according to the rotational speed ω of the pendulum holding member 2 connected to the crankshaft. Attenuates rotational fluctuations.

For example, the first to fourth centrifugal pendulums 3, 4, 11, and 12 apply a force opposite to the rotational fluctuation to the pendulum holding member 2 to attenuate the rotational fluctuation of the engine. Further, since the natural angular frequency ω _n varies depending on the rotational speed ω, the damper device 1 can attenuate the rotational fluctuation regardless of the rotational speed.

  FIG. 3 is a front view schematically showing an example of the damper device 1 in a state where the engine of the first embodiment is stopped. As shown in FIG. 3, for example, when the engine is stopped, the rotation of the damper device 1 is stopped. Thereby, the oscillation of the first to fourth centrifugal pendulums 3, 4, 11, and 12 is also stopped.

  The first to fourth centrifugal pendulums 3, 4, 11, and 12 that have stopped swinging may move to the positions shown in FIG. 3 due to, for example, gravity. In the state shown in FIG. 3, the support pin 5 is disposed at the upper end of the first to fourth grooves 31b, 32b, 41c, and 42c. In this way, the first to fourth centrifugal pendulums 3, 4, 11, and 12 are arranged at positions that are biased with respect to the pendulum holding member 2.

  When the engine is started, the pendulum holding member 2 starts rotating from the state shown in FIG. When the pendulum holding member 2 starts to rotate, the first to fourth centrifugal pendulums 3, 4, 11, and 12 move to the position shown in FIG.

  Hereinafter, the process in which the first and second centrifugal pendulums 3 and 4 move from the position shown in FIG. 3 to the position shown in FIG. 1 will be described in more detail. First, when the pendulum holding member 2 starts rotating, centrifugal force acts on the first and second centrifugal pendulums 3 and 4. Accordingly, the first and second centrifugal pendulums 3 and 4 are pushed toward the radially outer side of the central axis Ax1 by the centrifugal force, and try to move to the positions shown in FIG. In other words, the first and second centrifugal pendulums 3 and 4 try to move to a position where the support pin 5 is disposed at the center of the first to fourth grooves 31b, 32b, 41c, and 42c.

  The inner surfaces 31c, 32c of the first and second grooves 31b, 32b of the first and second swing members 31, 32 are in contact with the first outer peripheral surface 81b of the first sliding member 8. Therefore, when the first centrifugal pendulum 3 moves from the position shown in FIG. 3 to the position shown in FIG. 1, the inner surfaces 31c and 32c of the first and second grooves 31b and 32b and the first outer peripheral surface 81b For example, a clockwise torque in FIG. 3 acts on the first sliding member 8 and the support pin 5 due to the static frictional force between them.

  On the other hand, the inner surfaces 41 d and 42 d of the third and fourth grooves 41 c and 42 c of the third and fourth swing members 41 and 42 are in contact with the second outer peripheral surface 82 b of the first sliding member 8. Therefore, when the second centrifugal pendulum 4 tries to move from the position shown in FIG. 3 to the position shown in FIG. 1, the inner surfaces 41d and 42d of the third and fourth grooves 41c and 42c and the second outer peripheral surface 82b For example, a counterclockwise torque in FIG. 3 acts on the first sliding member 8 and the support pin 5 due to the static friction force between the first sliding member 8 and the support pin 5.

  Since reverse torque acts on the first sliding member 8 and the support pin 5, the rotation of the first sliding member 8 and the support pin 5 is limited. The static frictional force between the first sliding member 8 whose rotation is restricted and the first to fourth swing members 31, 32, 41, 42 is the first to fourth swing members 31, 32, 41, and 42 become resistance to moving from the position shown in FIG. 3 to the position shown in FIG. Note that the first sliding member 8 and the support pin 5 may rotate in the clockwise direction or the counterclockwise direction.

  The static friction coefficients of the first and second outer peripheral surfaces 81 b and 82 b of the first sliding member 8 are smaller than the static friction coefficients of the first and second surfaces 51 a and 52 a of the support pin 5. For this reason, at least one of the first and second swinging members 31 and 32 and the third and fourth swinging members 41 and 42 slips with respect to the first sliding member 8.

  At least one of the first and second oscillating members 31 and 32 and the third and fourth oscillating members 41 and 42 that slide relative to the first sliding member 8 is caused by centrifugal force in FIG. It moves from the position shown to the position shown in FIG. Due to the occurrence of the slip, the restriction on the rotation of the first sliding member 8 and the support pin 5 is eliminated. Therefore, the first and second swinging members 31 and 32 or the third and fourth swinging members 41 and 42 that have not slipped rotate the first sliding member 8 and the support pin 5. Thereby, it can move to the position shown in FIG. 1 from the position shown in FIG. 3 with a centrifugal force.

  As described above, the first and second outer peripheral surfaces 81b and 82b of the first sliding member 8 are more likely to have the first to fourth vibrations than the first and second surfaces 51a and 52a of the support pin 5. The resistance (static frictional force) to the movement of the moving members 31, 32, 41, 42 in the contact state is small. For this reason, slippage may occur between the first sliding member 8 and the first to fourth swing members 31, 32, 41, 42. In other words, the first sliding member 8 can smoothly move the first to fourth swinging members 31, 32, 41, and 42 with respect to the support pin 5 like a plain bearing (bush). it can. Accordingly, the first and second centrifugal pendulums 3 and 4 can move from the position shown in FIG. 3 to the position shown in FIG. Similarly, the third and fourth centrifugal pendulums 11 and 12 can be moved from the position shown in FIG. 3 to the position shown in FIG.

  As shown in FIG. 2, the first and second inner side surfaces 31 a and 32 a of the first and second swing members 31 and 32 may come into contact with the step portion 83 of the first sliding member 8. . However, the step portion 83 has a smaller resistance (static frictional force) to movement in the contact state of the first and second oscillating members 31 and 32 than the end surface (thrust surface) 52 b of the support pin 5. For this reason, the first and second swinging members 31 and 32 are caused to slip with respect to the step portion 83, and can move from the position shown in FIG. 3 to the position shown in FIG.

  The third and fourth inner side surfaces 41 a and 42 a of the third and fourth swing members 41 and 42 may contact the flange portion 84 of the first sliding member 8. However, the flange portion 84 has a smaller resistance (static frictional force) to movement in the contact state of the third and fourth swinging members 41 and 42 than the third support portion 53 and the stopper 7 of the support pin 5. . For this reason, the 3rd and 4th rocking | fluctuation members 41 and 42 produce a slip with respect to the flange part 84, and can move to the position shown in FIG. 1 from the position shown in FIG.

  When moved to the position shown in FIG. 1, the first to fourth centrifugal pendulums 3, 4, 11, and 12 are swung to attenuate the rotational fluctuation of the engine. At this time, the first sliding member 8 and the support pin 5 roll inside the first to fourth grooves 31b, 32b, 41c, and 42c. In other words, the first and second outer peripheral surfaces 81b and 82b of the first sliding member 8 and the first to fourth swinging members 31, 32, 41, and 42 cause a first force to be generated. The sliding member 8 and the support pin 5 rotate following the movement of the first to fourth centrifugal pendulums 3, 4, 11, and 12. Thereby, the time which a slip occurs is reduced and it is suppressed that the 1st sliding member 8 wears.

  For example, an impact may act on the first to fourth centrifugal pendulums 3, 4, 11, and 12 when the vehicle rides on. In this case, at least one of the first and second swinging members 31 and 32 and the third and fourth swinging members 41 and 42 slips with respect to the first sliding member 8. Further, when the influence of the impact is eliminated, at least one of the first and second swinging members 31 and 32 and the third and fourth swinging members 41 and 42 is attached to the first sliding member 8. On the other hand, slipping occurs, and the swinging can be resumed by moving to the position shown in FIG. Thereby, the 1st thru | or 4th centrifugal pendulum 3, 4, 11, 12 can move smoothly.

  In the damper device 1 according to the first embodiment described above, the first sliding member 8 includes the inner surface 31c of the first groove 31b of the first swing member 31 and the inner surface of the first groove 31b. It is interposed between the first surface 51a of the support pin 5 facing 31c. The first sliding member 8 has a smaller resistance with respect to movement in the contact state of the first rocking member 31 than the first surface 51a. For example, the pendulum holding member 2 is rotated from the state where the first swinging member 31 is disposed at a biased position where the support pin 5 is located at the end of the first groove 31b with respect to the pendulum holding member 2. May start. Even in this case, by providing the first sliding member 8, the first swinging member 31 can move relative to the pendulum holding member 2 in which the support pin 5 is located at the center of the first groove 31 b. It can move to a swingable position in a short time. Therefore, it is suppressed that the time until the damper device 1 starts to attenuate the rotational fluctuation is suppressed, and deterioration of the startability of the damper device 1 is suppressed.

  When one support pin 5 supports the first swing member 31 and the third swing member 41 as in the first embodiment, the first and third swing members 31, 41 The amplitude can be large. In this case, generally, it may take a long time for the first swing member 31 to move from the position shown in FIG. 3 to the position shown in FIG. However, according to the damper device 1 of the present embodiment, the first swing member 31 can move from the position shown in FIG. 3 to the position shown in FIG. 1 in a short time, and the damper device 1 attenuates the rotational fluctuation. An increase in the time until the start of the operation is suppressed.

  The friction coefficient of the first sliding member 8 is lower than the friction coefficient of the first surface 51a. That is, since the friction between the inner surface 31 c of the first groove 31 b of the first swing member 31 and the first sliding member 8 is small, the first swing member 31 is smooth against the support pin 5. Can be moved to. Accordingly, the first swing member 31 can move to a position where the first swing member 31 can swing with respect to the pendulum holding member 2 in a short time, and the time until the damper device 1 starts to attenuate the rotational fluctuation becomes longer. Is suppressed. Moreover, when the support pin 5 is rotatable, since the support pin 5 and the 1st sliding member 8 rotate, abrasion of the 1st sliding member 8 is suppressed. On the other hand, when the position of the support pin 5 and the first swing member 31 is in a state where swing due to centrifugal force and rotational fluctuation is difficult, the first groove 31b of the first swing member 31 By sliding the inner surface 31c with respect to the first sliding member 8, the first swinging member 31 can move to a position where it can swing with respect to the pendulum holding member 2 in a short time.

  Generally, the support pin 5 is rotatable, and the support pin 5 may support a plurality of swinging bodies. In this case, if the plurality of oscillating bodies try to move in directions opposite to each other, the rotation of the support pin 5 is hindered, making it difficult to move the plurality of oscillating bodies. On the other hand, in the present embodiment, the first sliding member 8 has the first surface 31 c between the inner surface 31 c of the first groove 31 b of the first swing member 31 and the first surface 51 a of the support pin 5. A cylindrical portion 81 is interposed. Further, the second cylindrical portion 82 of the first sliding member 8 is interposed between the inner surface 41 d of the third groove 41 c of the third swing member 41 and the second surface 52 a of the support pin 5. To do. As a result, the first swing member 31 and the third swing member 41 can slide relative to the first slide member 8 independently of each other and swing relative to the pendulum holding member 2. Further, the step portion 83 of the first sliding member 8 faces the first inner side surface 31 a of the first swing member 31. Accordingly, the first swing member 31 contacts the support pin 5 in the axial direction, and the friction between the first swing member 31 and the support pin 5 causes the first swing with respect to the pendulum holding member 2. Preventing the movement of the member 31 is suppressed. Accordingly, the first swing member 31 can move to a position where the first swing member 31 can swing with respect to the pendulum holding member 2 in a short time, and the time until the damper device 1 starts to attenuate the rotational fluctuation becomes longer. Is suppressed.

(Second Embodiment)
The second embodiment will be described below with reference to FIG. In the following description of the plurality of embodiments, components having the same functions as the components already described are denoted by the same reference numerals as those described above, and further description may be omitted. . In addition, a plurality of components to which the same reference numerals are attached do not necessarily have the same functions and properties, and may have different functions and properties according to each embodiment.

  FIG. 4 is a cross-sectional view illustrating a part of an example of the damper device 1 according to the second embodiment. As shown in FIG. 4, in the second embodiment, the first sliding member 8 has a first tube portion 81 and a flange portion 84. In the present embodiment, the first tube portion 81 is an example of a tube portion. The flange portion 84 is an example of a wall portion.

  The first cylindrical portion 81 of the first sliding member 8 is interposed between the inner surface 31c of the first groove 31b and the first surface 51a, as in the first embodiment. The first cylindrical portion 81 of the other first sliding member 8 is interposed between the inner surface 32c of the second groove 32b and the first surface 51a.

  The flange portion 84 of the second embodiment protrudes from the one end portion of the first tube portion 81 in the radial direction of the rotation axis Ax2. In the axial direction of the central axis Ax1, the flange portion 84 of one first sliding member 8 is located between the end surface 52b of the support pin 5 and the first swinging member 31. Further, the flange portion 84 is located between the first swing member 31 and the third swing member 41.

  In the axial direction of the central axis Ax1, the flange portion 84 of the other first sliding member 8 is located between the end surface 52b of the support pin 5 and the second swinging member 32. Further, the flange portion 84 is located between the second swing member 32 and the fourth swing member 42.

  In the second embodiment, the second surface 52a of one second support portion 52 is in contact with the inner surface 41d of the third groove 41c. The second surface 52a of the other second support portion 52 is in contact with the inner surface 42d of the fourth groove 42c. That is, the support pin 5 is in contact with the third and fourth swing members 41 and 42.

  The coefficient of static friction between the first outer peripheral surface 81b of the first sliding member 8 and the first or second swinging member 31, 32 is the same as that of the first surface 51a of the support pin 5 and the first or second. The coefficient of static friction of the rocking members 31 and 32 is smaller. For this reason, the first and second swinging members 31 and 32 slip with respect to the first sliding member 8, and can move from the position shown in FIG. 3 to the position shown in FIG. The third and fourth swinging members 41 and 42 can move from the position shown in FIG. 3 to the position shown in FIG. 1 by rotating the support pin 5.

  In the damper device 1 of the second embodiment described above, the first sliding member 8 has the flange portion 84 positioned between the support pin 5 and the first swinging member 31 in the axial direction. Accordingly, the first swing member 31 contacts the support pin 5 in the axial direction, and the friction between the first swing member 31 and the support pin 5 causes the first swing with respect to the pendulum holding member 2. Preventing the movement of the member 31 is suppressed. Accordingly, the first swing member 31 can move to a position where the first swing member 31 can swing with respect to the pendulum holding member 2 in a short time, and the time until the damper device 1 starts to attenuate the rotational fluctuation becomes longer. Is suppressed.

(Third embodiment)
The third embodiment will be described below with reference to FIG. FIG. 5 is a cross-sectional view illustrating a part of an example of the damper device 1 according to the third embodiment. As shown in FIG. 5, the damper device 1 of the third embodiment has a coating 13 instead of the first sliding member 8. The coating 13 is an example of a bearing portion.

  The coating 13 is made of, for example, a synthetic resin such as PEEK or PTFE, like the first sliding member 8. The coating 13 covers the surface of the support pin 5. For this reason, the coating 13 is interposed between the inner surfaces 31c and 32c of the first and second grooves 31b and 32b and the first surface 51a. Further, the coating 13 is interposed between the inner surfaces 41d and 42d of the third and fourth grooves 41c and 42c and the second surface 52a.

  Similar to the first sliding member 8, the coating 13 is more resistant to movement in the contact state of the first to fourth oscillating members 31, 32, 41, 42 than the first surface 51 a (static friction force). ) Is small. As a result, slippage may occur between the coating 13 and the first to fourth swing members 31, 32, 41, 42. Accordingly, the first and second centrifugal pendulums 3 and 4 can move from the position shown in FIG. 3 to the position shown in FIG.

  As shown in the third embodiment described above, the bearing portion is not limited to a part attached to the support pin 5 such as the first sliding member 8, but the surface of the support pin 5 such as the coating 13. The part formed in this may be sufficient. By providing the coating 13 on the support pin 5, an increase in the number of parts of the damper device 1 is suppressed.

(Fourth embodiment)
Hereinafter, the fourth embodiment will be described with reference to FIG. FIG. 6 is a cross-sectional view illustrating a part of an example of the damper device 1 according to the fourth embodiment. As shown in FIG. 6, the damper device 1 according to the fourth embodiment includes a rolling bearing 14 instead of the first sliding member 8. The rolling bearing 14 is an example of a bearing portion.

  The rolling bearing 14 is a ball bearing, and has an inner ring 14a, an outer ring 14b, and a plurality of balls 14c. The rolling bearing 14 may be another radial bearing such as a roller bearing, for example.

  The inner ring 14 a is attached to the first support portion 51 of the support pin 5. The outer ring 14b surrounds the inner ring 14a via a plurality of balls 14c. The rolling bearing 14 is interposed between the inner surfaces 31c and 32c of the first and second grooves 31b and 32b and the first surface 51a.

  The outer ring 14 b of one rolling bearing 14 faces the inner surface 31 c of the first groove 31 b of the first swing member 31. The outer ring 14 b contacts the inner surface 31 c of the first groove 31 b and supports the first swing member 31.

  The outer ring 14 b of the other rolling bearing 14 faces the inner surface 32 c of the second groove 32 b of the second swing member 32. The outer ring 14 b contacts the inner surface 32 c of the second groove 32 b and supports the second swing member 32.

  In 4th Embodiment, the 2nd surface 52a of one 2nd support part 52 contacts the inner surface 41d of the 3rd groove | channel 41c. The second surface 52a of the other second support portion 52 is in contact with the inner surface 42d of the fourth groove 42c. That is, the support pin 5 is in contact with the third and fourth swing members 41 and 42.

  The rolling resistance coefficient in the state where the rolling bearing 14 is in contact with the inner surface 31c of the first groove 31b or the inner surface 32c of the second groove 32b is the first surface 51a is the inner surface 31c or the second groove of the first groove 31b. It is smaller than the rolling resistance coefficient in the state in contact with the inner surface 32c of 32b. For this reason, the outer ring 14b of the rolling bearing 14 rolls along the first and second grooves 31b and 32b. Thereby, the 1st and 2nd rocking | swiveling members 31 and 32 can move to the position shown in FIG. 1 from the position shown in FIG. 3 with a centrifugal force.

  The outer ring 14b is rotatable independently of the support pin 5 to which the inner ring 14a is attached. For this reason, the support pin 5 to which the inner ring 14a is attached rolls along the third and fourth grooves 41c and 42c independently of the rotation of the outer ring 14b. Thereby, the 3rd and 4th rocking | fluctuation members 41 and 42 can move to the position shown in FIG. 1 from the position shown in FIG. 3 with a centrifugal force.

  As described above, the rolling bearing 14 has a smaller resistance (rolling resistance, rolling resistance) to movement in the contact state of the first and second rocking members 31 and 32 than the first surface 51a. Thereby, the outer ring 14b of the rolling bearing 14 can roll along the first and second grooves 31b and 32b in a state where the outer ring 14b is in contact with the first and second swinging members 31 and 32. Accordingly, the first and second centrifugal pendulums 3 and 4 can move from the position shown in FIG. 3 to the position shown in FIG.

  The damper device 1 according to the fourth embodiment described above includes the rolling bearing 14. For this reason, the outer ring 14 b of the rolling bearing 14 that supports the inner surface 31 c of the first groove 31 b of the first swing member 31 is supported by the inner ring 14 a of the rolling bearing 14 that is supported by the first surface 51 a of the support pin 5. In contrast, it rotates smoothly. That is, since the rolling resistance between the outer ring 14 b of the rolling bearing 14 and the inner surface 31 c of the first groove 31 b of the first swinging member 31 is small, the first swinging member 31 is against the support pin 5. Can move smoothly. Accordingly, the first swing member 31 can move to a position where the first swing member 31 can swing with respect to the pendulum holding member 2 in a short time, and the time until the damper device 1 starts to attenuate the rotational fluctuation becomes longer. Is suppressed.

(Fifth embodiment)
The fifth embodiment will be described below with reference to FIGS. FIG. 7 is a front view schematically showing a part of an example of the damper device 1 according to the fifth embodiment. FIG. 8 is a cross-sectional view illustrating a part of an example of the damper device 1 according to the fifth embodiment.

  In the first to fourth embodiments, the support pins 5 support two of the first to fourth centrifugal pendulums 3, 4, 11, and 12, respectively. However, as shown in FIG. 7, in the fifth embodiment, the support pins 5 support any one of the first to fourth centrifugal pendulums 3, 4, 11, and 12, respectively. The damper device 1 of the fifth embodiment has, for example, eight support pins 5.

  Instead of the support holes 24, eight support grooves 27 are provided in the pendulum holding member 2 of the fifth embodiment. The support groove 27 is located near the outer periphery of the pendulum holding member 2. The support groove 27 extends in the axial direction of the central axis Ax1 and opens in the first side surface 22 and the second side surface 23.

  The support groove 27 extends in a curved shape so as to move away from the central axis Ax1 as it approaches the center from both ends. In other words, the support groove 27 is formed in a substantially U shape that curves toward the outer side in the radial direction of the central axis Ax1.

  As shown in FIG. 8, the third support portion 53 of the support pin 5 is inserted through the support groove 27. The shaft diameter of the third support portion 53 is smaller than the width of the support groove 27. For this reason, the 3rd surface 53a of the 3rd support part 53 faces the inner surface 27a of the support groove 27 via a space | interval.

  The damper device 1 of the fifth embodiment has eight second sliding members 15 instead of the support bearing 6. Similar to the first sliding member 8, the second sliding member 15 is made of a synthetic resin such as PEEK or PTFE, and has a substantially cylindrical shape. The second sliding member 15 may be made of other materials such as metal.

  The second sliding member 15 is attached to the third support portion 53 of the support pin 5. In other words, the third support portion 53 is fitted inside the second sliding member 15. For this reason, the second sliding member 15 is interposed between the inner surface 27 a of the support groove 27 and the third surface 53 a of the third support portion 53.

  The second sliding member 15 has an inner peripheral surface 15a and an outer peripheral surface 15b. The inner peripheral surface 15 a is in contact with the third surface 53 a of the third support portion 53. The outer peripheral surface 15 b is located on the opposite side of the inner peripheral surface 15 a and faces the inner surface 27 a of the support groove 27. The outer peripheral surface 15 b contacts the inner surface 27 a of the support groove 27 and is supported by the pendulum holding member 2.

  For example, when the support pin 5 rolls along the first and second grooves 31 b and 32 b and the support groove 27, the first and second swing members 31 and 32 are first with respect to the pendulum holding member 2. Oscillates relatively in the circumferential direction of the oscillation center C1. At this time, the support pin 5 rotates due to the frictional force between the outer peripheral surface 15 b of the second sliding member 15 and the inner surface 27 a of the support groove 27.

  The friction coefficient of the second sliding member 15 is lower than the friction coefficient of the third surface 53 a of the support pin 5. Specifically, the static friction coefficient between the outer peripheral surface 15 b of the second sliding member 15 and the pendulum holding member 2 is lower than the static friction coefficient between the third surface 53 a of the support pin 5 and the pendulum holding member 2. . That is, the outer peripheral surface 15 b of the second sliding member 15 has a smaller resistance (static frictional force) to movement in the contact state of the pendulum holding member 2 than the third surface 53 a of the support pin 5.

  For example, when the first centrifugal pendulum 3 is arranged at a position biased with respect to the pendulum holding member 2 or when an impact is applied to the first centrifugal pendulum 3, the second sliding member 15 and the pendulum holding Slip may occur between the member 2. In other words, the second sliding member 15 can smoothly move the support pin 5 relative to the pendulum holding member 2 like a slide bearing. Therefore, the first centrifugal pendulum 3 can smoothly move to a position where the support pin 5 is arranged at the center of the first and second grooves 31b and 32b and the support groove 27, and can start swinging. it can.

  As in the damper device 1 of the fifth embodiment described above, the support pin 5 is not limited to the rolling bearing such as the support bearing 6, but is also supported by a sliding bearing such as the second sliding member 15. It may be supported by the member 2. As the second sliding member 15 slides with respect to the inner surface 27a of the support groove 27, the first centrifugal pendulum 3 can move more smoothly.

  Note that the support pin 5 to which the support bearing 6 that is a rolling bearing is attached may roll along the support groove 27. In this case, the outer ring of the support bearing 6 has smaller resistance (rolling resistance) to movement in the contact state of the pendulum holding member 2 than the third surface 53 a of the support pin 5. As a result, the first centrifugal pendulum 3 smoothly moves to a position where the support pin 5 is arranged at the center of the first and second grooves 31b and 32b and the support groove 27, and starts swinging. Can do.

  As mentioned above, although embodiment of this invention was illustrated, the said embodiment and modification are examples to the last, Comprising: It is not intending limiting the range of invention. The above-described embodiments and modifications can be implemented in various other forms, and various omissions, replacements, combinations, and changes can be made without departing from the scope of the invention. In addition, the configuration and shape of each embodiment and each modification may be partially exchanged.

  DESCRIPTION OF SYMBOLS 1 ... Damper apparatus, 2 ... Pendulum holding member, 3 ... 1st centrifugal pendulum, 4 ... 2nd centrifugal pendulum, 5 ... Support pin, 8 ... 1st sliding member, 13 ... Coating, 14 ... Rolling bearing, 31 ... first swing member, 31a ... first inner surface, 31b ... first groove, 31c ... inner surface, 41 ... third swing member, 51 ... first support, 51a ... first Surface, 52 ... second support portion, 52a ... second surface, 81 ... first tube portion, 82 ... second tube portion, 83 ... step portion, 84 ... flange portion, Ax1 ... center axis, C1 ... First swing center.

Claims (5)

A rotating body that can rotate around the center of rotation;
A support member protruding in the axial direction of the rotation center from the rotating body;
The rotating body has a side surface facing the rotating body, a first opening is provided in the side surface and accommodates the supporting member, and the rotating member is moved in the first opening so that the supporting member moves. A first rocking body that is relatively movable in the circumferential direction of the first rocking center;
It is interposed between the inner surface of the first opening and the first surface of the support member facing the inner surface of the first opening, and the contact of the first oscillating body is more than the first surface. A bearing portion having low resistance to movement in a state; and
A damper device comprising:   The damper device according to claim 1, wherein the bearing portion is a rolling bearing.   The damper device according to claim 1, wherein a friction coefficient of the bearing portion is lower than a friction coefficient of the first surface.   The bearing portion projects between the cylindrical portion interposed between the inner surface of the first opening and the first surface, the cylindrical portion, and the support member and the first rocking body in the axial direction. The damper device according to claim 3, further comprising a wall portion positioned therebetween. A second opening for receiving the support member is provided, and is positioned between the support member and the first rocking body in the axial direction, and the support member moves in the second opening. A second rocking body movable relative to the rotating body in the circumferential direction of the second rocking center,
Further comprising
The bearing portion includes a first tube portion interposed between an inner surface of the first opening and the first surface, and the support facing the inner surface of the second opening and the inner surface of the second opening. A second cylindrical portion interposed between the second surface of the member, a step of connecting the first cylindrical portion and the second cylindrical portion, and facing the side surface of the first oscillator. And having a part,
The damper device according to claim 3.

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