JP2016070323A - Friction buffer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a friction buffer device capable of restricting erroneous assembling of frictional members.SOLUTION: A friction member 71 set in position in one of the first rotating member 50 and the second rotating member 60 so as to generate a friction force with a friction surface 71b between it and the other rotating member is installed between the first rotating member 50 and the second rotating member 60 that can be rotated at a rotation center Ax. A plurality of the first position setting parts 30 for position setting the friction member 71 are arranged at the first rotating member 50, they are arranged in non-symmetrical manner against any imaginary straight line P passing through the rotation center Ax as seen in an axial direction and at the same time a plurality of the second position setting parts 40 are arranged at positions where they are overlapped at each of the first position setting parts 30 of the first friction member 71 and each of them is aligned in a position overlapped with each of the first position setting parts 30, they are arranged in non-symmetrical manner against any imaginary straight line P passing through a rotation center Ax as seen in an axial direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a friction shock absorber, and particularly relates to a structure of a friction shock absorber that suppresses erroneous assembly of a friction member.

  Conventionally, the friction damping device is applied to a vehicle or the like as an example. In this case, the friction damping device is provided between the engine serving as an input and the transmission serving as an output in the power transmission system of the vehicle. Such a friction shock absorber is sandwiched between a first rotating member and a second rotating member that have a friction surface and a first rotating member and a second rotating member that rotate around the center of rotation. A friction member that generates a frictional force on the friction surface when a predetermined torque or more acts on the input side between the input and output of the power transmission system to cause relative rotation, and is provided on each of the first rotating member and the friction member. And a positioning portion for restricting movement of the position where the friction member is provided with respect to the first rotating member (for example, Patent Document 1).

JP 2010-230162 A

  In the above-described apparatus, when the friction member is assembled between the first rotation member and the second rotation member, for example, the friction member is properly positioned with respect to the first rotation member or the second rotation member. If it is not correctly assembled at the position, there may be a problem that the assembly cannot be performed correctly or that it takes time. For this reason, in order to prevent this, it is necessary to take measures to prevent the friction member from being assembled by mistake.

  Means taken in order to solve the above-described problem includes a first rotating member that can rotate around a rotation center, and an overlapping portion that overlaps in the axial direction of the first rotating member and the rotation center. Positioned on one of the second rotating member, the first rotating member, and the second rotating member that can rotate about the rotation center with respect to the one rotating member, the first rotating member, and the first rotating member A friction member that is sandwiched between the overlapping portions and generates a frictional force on the friction surface between the other portion, provided on the first rotating member, and passes through the center of rotation when viewed in the axial direction. A plurality of first positioning portions arranged asymmetrically with respect to the virtual straight line, and provided in the friction member, provided in positions overlapping with each of the first positioning portions in the axial direction of view, Aligned with the first positioning part and viewed in the axial direction And a configuration and a plurality of second positioning portions arranged corresponding to the position of the first positioning portion is asymmetric with respect to any virtual straight line passing through the center of rotation. Due to the above configuration, due to the asymmetry of the arrangement of the plurality of first positioning portions and the plurality of second positioning portions, for example, other than the correct position (posture) when assembling friction members having different friction coefficients on the front and back surfaces Then, the friction member cannot be assembled to the first rotating member.

  In the configuration described above, the friction member is configured in an annular shape, and the second positioning portion is provided in either the annular interior or the peripheral portion. With this configuration, the position of the second positioning portion on the friction member can be freely set in the annular shape. Due to the asymmetry of the first positioning portion, the error of the friction member configured in an annular shape and a plate shape can be achieved. Assembly is suppressed.

  In the friction buffer device, for example, the second positioning portion is provided with a notch in which a part of the first positioning portion is accommodated in the peripheral portion. With this configuration, the friction member can be efficiently positioned at a predetermined position using the notch. In this case, the width in the radial direction of the annular shape can be reduced as compared with the configuration in which the friction member is positioned inside the annular shape.

  The second positioning portion is configured as a long hole inclined in the same direction. With this configuration, when the wrong assembly is performed, the inclination direction of the long hole is changed, and the erroneous assembly of the friction member is suppressed.

  Moreover, the said friction member is comprised by the division | segmentation annular | circular shape, and the said some friction member is arrange | positioned along with the circumferential direction. Therefore, by configuring the friction member in a split annular shape, it is possible to reduce the size by dividing the friction member, and a plurality of friction members are arranged in the circumferential direction due to the asymmetry of the first positioning portion. Incorrect assembly of the friction member in the configuration is suppressed.

  In the friction buffer device, for example, the first rotating member is provided with at least three first positioning portions having different circumferential intervals, and the second rotating member includes The second positioning portion corresponding to the first positioning portion is provided. Therefore, the alignment between the first positioning portion and the second positioning portion is more easily or more easily performed due to the difference in the circumferential interval between the first positioning portions.

  In the friction shock absorber, for example, the first rotating member is provided with at least two first positioning portions having different shapes, and each of the second rotating members has the first rotating member. The second positioning part corresponding to one positioning part is provided. Therefore, the first positioning portion and the second positioning portion are more easily or more easily aligned due to the shape difference of the first positioning portion.

  In the friction shock absorber, for example, one of the first positioning portion and the second positioning portion has a protrusion protruding to the other side of the first positioning portion and the second positioning portion. A first opening that opens toward the one side and into which the protruding portion enters, and the first opening that is located on the opposite side of the first opening. And a second opening that is open toward the opposite side and cannot accommodate the protrusion. Therefore, the positioning of the first positioning portion and the second positioning portion is more easily or more easily performed due to the shape difference between the first opening and the second opening.

  In the friction shock absorber, for example, one of the first positioning portion and the second positioning portion has a protrusion protruding to the other side of the first positioning portion and the second positioning portion. A portion is provided, and the other is preferably provided with a notch that is located at the peripheral edge of the first rotating member or the friction member with a line of sight in the axial direction and that accommodates at least a part of the protruding portion. Therefore, the asymmetry of the arrangement of the protrusions suppresses erroneous assembly in the configuration in which the peripheral edge is provided with a notch.

  In the friction shock absorber, for example, the first positioning portion and the second positioning portion may be configured asymmetrically with respect to an imaginary straight line passing through the rotation center with the line of sight in the axial direction. Therefore, the friction member cannot be assembled to the first rotating member except for the correct position (posture) due to the asymmetry of the configuration of the first positioning portion and the second positioning portion.

  Further, the friction shock absorber according to the embodiment includes, for example, a first rotating member that can rotate around a rotation center, a first portion that overlaps the first rotating member and the axial direction of the rotation center, and the shaft. A first positioning structure that is asymmetric with respect to any imaginary straight line passing through the rotation center with a line of sight in a direction, and a second rotation member provided rotatably around the rotation center; A second positioning structure fixed to the second rotating member, aligned with the first positioning structure, and asymmetric with respect to any imaginary straight line passing through the rotation center as viewed in the axial direction; And a friction member sandwiched between the first rotating member and the first portion. Therefore, due to the asymmetry of the first positioning structure, the friction member cannot be assembled to the first rotating member except for the correct position (posture).

  In addition, the friction shock absorber according to the embodiment includes, for example, a first rotating member that can rotate around the rotation center, and a first portion that overlaps the first rotating member and the axial direction of the rotation center, A second rotating member rotatable around the rotation center, a friction member fixed to the first rotating member and sandwiched between the first rotating member and the first portion, A first positioning portion provided on one rotating member and a position of the friction member that overlaps the first positioning portion in the axial line of sight and are aligned with the first positioning portion. A first positioning part and a second positioning part, one of the first positioning part and the second positioning part protruding to the other side of the first positioning part and the second positioning part Part is provided, and the other side is directed toward the one side. A first opening into which the protrusion is inserted, and a first opening that is located on the opposite side of the first opening and that faces away from the first opening and cannot accommodate the protrusion. Two openings. Therefore, the friction member cannot be assembled to the first rotating member except for the correct position (posture) due to the difference in shape between the first opening and the second opening.

FIG. 1 is a cross-sectional view when the friction damping device according to the first embodiment is applied to a damper device. FIG. 2 is a plan view of an annular friction member (first friction member shown in FIG. 1). FIG. 3 is a plan view of an annular friction member in the second embodiment. FIG. 4 is a plan view of an annular friction member in the third embodiment. FIG. 5 is a plan view of an annular friction member in the fourth embodiment. FIG. 6 is a plan view of a split annular friction member in the fifth embodiment. FIG. 7 is a plan view of a split annular friction member in the sixth embodiment. FIG. 8 is a partial fragmentary sectional view showing a configuration around a friction member in the seventh embodiment. FIG. 9 is a partial fragmentary sectional view showing a configuration around a friction member according to an eighth embodiment. FIG. 10 is a cross-sectional view of an essential part showing a configuration around a friction member in the ninth embodiment. FIG. 11 is a cross-sectional view of an essential part showing a configuration around a friction member in the tenth embodiment.

  Hereinafter, embodiments will be described with reference to the drawings. In addition, in the some embodiment shown below, when the same component is included, a common code | symbol is attached | subjected and description of the overlapping part is abbreviate | omitted. In addition, the configuration, technical features, and operational effects and results provided by the configuration described below are merely examples. The present invention can be realized by configurations other than those disclosed in the following embodiments, and various derived effects obtained by the basic configuration (technical features) can be obtained.

<First Embodiment>
In this embodiment, a case where the friction damping device is applied to a vehicle damper device 100 will be described as an example. In this case, the damper device 100 is positioned in a power transmission system between an engine (power device, not shown) that generates driving force and a transmission (transmission device, not shown) to which output from the engine is transmitted. Shall. The damper device 100 can mitigate rotational fluctuations accompanying the driving force from the engine using an internal mechanism shown below. The damper device 100 is not limited to being positioned between the engine and the transmission, and is provided between the other two rotating elements (for example, between the engine and the rotating electrical machine (motor generator)) in a hybrid vehicle or the like. It is also possible. Further, it can be provided in various vehicles (for example, hybrid vehicles), machines having rotating elements, and the like. In the following description, unless otherwise specified, as shown in FIG. 1, the axial direction is the axial direction of the rotation center Ax (rotation axis, axial center, see FIG. 1), the radial direction is the radial direction of the rotation center Ax, The circumferential direction is defined as indicating the circumferential direction of the rotation center Ax.

  The damper device 100 is configured in a flat disk shape that is thin in the axial direction, and roughly includes a damper portion 101 and a limiter portion 102 that serves as a friction damping device. The damper portion 101 is a limiter portion. It is comprised inside 102 of the radial direction. The damper 101 relieves torque fluctuations generated in the engine that is input to the damper device 100 on the output side by elastic expansion and contraction of the first elastic member 31 typified by a coil spring. On the other hand, when the friction members 71 and 72, which will be described later, disposed between the input and output of the power transmission system receive excessive torque from the engine, the limiter unit 102 causes relative rotation by sliding of the friction members 71 and 72. Occurs, blocking the transmission of excessive torque to the transmission side.

  The damper portion 101 includes an outer member 10 represented by a side plate, an inner member 20 represented by an inner plate, a first elastic member 31 having the same shape and material, a second elastic member 32, Similarly, a first sliding member 41 and a second sliding member 42 having the same shape and material are included. One of the outer member 10 and the inner member 20, for example, the outer member 10 is connected to the input side engine, and the other inner member 20 is connected to the output side transmission. The outer member 10 and the inner member 20 are each configured in an annular and plate shape that expands in the radial direction with respect to the rotation center Ax, and have hook-shaped portions that are separated from each other in the axial direction. The first elastic member 31 elastically expands and contracts in the circumferential direction with relative rotation about the rotation center Ax between the outer member 10 and the inner member 20. Thereby, even if there is a torque fluctuation from the input side, the torque fluctuation is reduced to the output side. Further, the first sliding member 41 and the second sliding member 42 slide between the outer member 10 and the inner member 20, so that frictional resistance is given.

  The outer member 10 has two bowl-shaped wall portions 11 and 12 (forming a separation plate portion). Each of the wall portions 11 and 12 is formed in an annular and plate shape that expands in the radial direction and the axial direction with respect to the rotation center Ax, and extends in the axial direction and is separated from each other. In the present embodiment, for example, the wall 11 is positioned on one side of the wall 12 in the axial direction (left side in FIG. 1), and the wall 12 is on the other side in the axial direction of the wall 11 (right side in FIG. 1). ). The walls 11 and 12 are provided with a plurality of openings 11a and 12a at intervals in the circumferential direction, respectively. As shown in FIG. 1, the openings 11 a and 12 a are provided at positions where the radial distance from the rotation center Ax is equal. The wall portion 11 and the wall portion 12 are coupled to each other by a coupling tool 13 such as a rivet or a screw on the radially outer side which is parallel to each other. As a result, the radially outer side of the wall portion 11 and the radially outer side of the wall portion 12 are integrally coupled in a state where they overlap each other in the radial direction, and at least the radially inner region of the wall portion 11 and the wall At least the radially inner region of the portion 12 is in a state of being separated from each other in the axial direction. The walls 11 and 12 of the outer member 10 are made of a metal material such as an iron plate, for example.

  The inner member 20 rotates about the rotation center Ax and is a cylindrical portion 21 called a hub, and a wall portion 22 that forms a plate portion extending radially outward from the axial central portion of the cylindrical portion 21. And having. The wall 22 is provided with a plurality of openings 22a penetrating at intervals in the circumferential direction, and the inner member 20 is made of a metal material such as iron, for example.

  The first elastic member 31 is provided in the circumferential direction, and an end is sandwiched between the outer member 10 and the inner member 20, and is elastic in the circumferential direction with relative rotation around the rotation center Ax. Stretch and contract. Specifically, the first elastic member 31 is, for example, a coil spring made of a metal material such as iron, and is accommodated in the openings 11a, 12a, and 22a as shown in FIG. With such a configuration, the edge on one side in the circumferential direction of the openings 11a and 12a of the outer member 10 and the edge on the other side in the circumferential direction of the opening 22a on the inner member 20 are relatively close to each other. When it rotates, it is compressed and the first elastic member 31 is elastically contracted. Conversely, in a state where the openings 11a, 12a, and 22a are elastically contracted, one edge of the outer member 10 in the circumferential direction of the openings 11a and 12a and the circumferential direction of the opening 22a of the inner member 20 are provided. When the end portion on the other side is relatively rotated away from each other, the first elastic member 31 is elastically extended from the compressed state. The first elastic member 31 stores the torque input to the damper device 100 as a compression force by being elastically contracted, and releases the compression force as a torque by being elastically extended. Thus, the 1st elastic member 31 is located between the outer member 10 and the inner member 20, is pinched | interposed into the outer member 10 and the inner member 20 along the circumferential direction, and is elastic along the circumferential direction. Stretch and contract. In this way, the damper portion 101 can absorb the torque fluctuation generated on the input side in the power transmission system and relieve the output side by the expansion and contraction of the first elastic member 31.

  The first sliding member 41 is sandwiched between the radially inner end portion of the wall portion 11 and the outer peripheral surface of the tubular portion 21 in the radial direction. Further, in the axial direction, it is sandwiched between the wall portion 11 and the wall portion 22 extending in the radial direction. Similarly, the second sliding member 42 is sandwiched between the radially inner end portion of the wall portion 12 and the outer peripheral surface of the tubular portion 21 in the radial direction. In the axial direction, the wall portion 12 and the wall portion 22 extending in the radial direction from the tubular portion 21 are sandwiched. The first sliding member 41 and the second sliding member 42 have sliding surfaces 41 a and 42 a that function as friction surfaces on the side of the wall portion 22 extending in the radial direction. Is provided. The first sliding member 41 and the second sliding member 42 generate a sliding torque due to friction when the outer member 10 and the inner member 20 rotate relatively around the rotation center Ax, Vibration and noise can be reduced. The first sliding member 41 and the second sliding member 42 are made of, for example, a resin material or a synthetic resin material.

  The second elastic member 32 is positioned between the wall portion 12 and the second sliding member 42, and applies an elastic force to the wall portion 11 and the second sliding member 42 in a direction away from each other. ing. The second elastic member 32 has the same length as the sliding surfaces 41 a and 42 a in the radial direction and overlaps with the wall portion 22 in the axial direction. That is, the second elastic member 32 presses the second sliding member 42 against the wall portion 11 with the wall portion 22 extending in the radial direction and the first sliding member 41 sandwiched therebetween. Thus, the second elastic member 32 can give sliding resistance (friction resistance) to each of the sliding surfaces 41a and 42a. The second elastic member 31 is, for example, an annular leaf spring made of a metal material, and a disc spring or a cone spring may be used.

  In FIG. 1, a limiter unit 102 that functions as a friction damping device is provided in series in the power transmission path between the input and output outside the radial direction of the damper unit 101, and the damper device 100 includes a damper unit 101, a limiter unit 102, Is within the range of the length of the cylindrical portion 21 in the axial direction, and is provided in the radial direction in an internal / external relationship.

  The limiter unit 102 is configured to be an annular shape or an annular shape. As shown in FIG. 1, in the present embodiment, the limiter unit 102 includes the first rotation member 50 and the first rotation member in order from the other side in the axial direction (right side in FIG. 1) to one side (left side in FIG. 1). One friction member 71, second rotation member 60, second friction member 72, third rotation member 80, third elastic member 33, and fourth rotation member 90 are included. The first rotating member 50, the first friction member 71, the second rotating member 60, the second friction member 72, the third rotating member 80, the third elastic member 33, and the fourth rotating member 90. Are stacked in close contact with each other in the axial direction.

  The first rotating member 50 called a first plate or a thrust plate has a planar wall portion 51 extending in the radial direction and a protruding portion 52 continuously extending in the axial direction in the limiter portion 102. The wall portion 51 serving as a flat plate portion is formed in an annular plate shape spreading in the radial direction with respect to the rotation center Ax. The wall 51 is provided with a plurality of openings 51a and openings 51b each having a hole in the circumferential direction. The protruding portion 52 provided in the limiter portion 102 is provided on the inner side in the radial direction than the opening portion 51 a of the wall portion 51. Moreover, the protrusion part 52 protrudes in the direction (same direction as an axial direction) orthogonal to the wall part 51 toward the 1st friction member 71 side used as the one side of an axial direction from the wall part 51. FIG. In the present embodiment, the plurality of protrusions 52 (see FIG. 2) are provided at predetermined intervals in the circumferential direction around the rotation center Ax. The first rotating member 50 is made of a metal material such as iron, for example.

  The second rotating member 60 called a second plate or a middle plate is located on one side (left side in FIG. 1) of the first rotating member 50 in the axial direction. The second rotating member 60 has a plate-like wall portion 61 extending in the radial direction. The wall portion 61 is formed in an annular shape that expands in the radial direction with respect to the rotation center Ax. The wall portion 61 includes a first portion 61a in which the overlapping portion that overlaps the first rotating member 50 in the axial direction functions as a friction generating portion, and a second portion 61b that functions as a support portion that supports the first portion 61a. And having. The first portion 61a has a radial direction in which a plate-like wall portion 61 extending in the radial direction is opposed to the first rotating member 50 in the axial direction while being spaced apart by a predetermined interval and overlaps with the first friction member 71. The second portion 61b is defined here as a radially inner region from the first portion 61a. The second portion 61b is caulked and fixed together with the wall portion 11 and the wall portion 12 of the damper portion 101 by a coupler 13 such as a rivet or a screw. By this coupler 13, the second rotating member 60 rotates integrally with the outer member 10 around the rotation center Ax. The second rotating member 60 is made of, for example, a metal material.

  A third rotating member 80 called a third plate or a pressure plate includes a wall portion 81 that extends in the radial direction at the limiter portion 102 and a hooking portion 82 that extends continuously from the outer edge portion of the wall portion 81 in the axial direction. And a protrusion 83 extending in the axial direction at a position where the radially inner protrusion 52 is provided with respect to the hook portion 82. The plate-like wall portion 81 is formed in an annular shape that expands in the radial direction with respect to the rotation center Ax. The wall portion 81 is located away from the second rotating member 60 on the side opposite to the first rotating member 50. Further, the plate-like wall portion 81 is an area overlapping with the wall portion 51 of the first rotating member 50 and the first portion 61a of the second rotating member 60 functioning as a friction generating portion in the present embodiment in the axial direction. have. The hook 82 is bent at a right angle from the radially outer end of the wall 81 and extends toward the first rotating member 50 in the axial direction. Further, in the present embodiment, a plurality of hooking portions 82 corresponding to the positions where the openings 51a of the first rotating member 50 are provided are provided at predetermined intervals in the circumferential direction. The plurality of hook portions 82 are inserted into and engaged with the openings 51a provided at the corresponding positions. Thereby, the 3rd rotation member 80 and the 1st rotation member 50 are integrated, and the 3rd rotation member 80 rotates the 1st rotation member 50 and the periphery of the rotation center Ax integrally. The protruding portion 83 of the limiter portion 102 is provided at the same position facing the protruding portion 52 in the radial direction inside the hooking portion 82 of the wall portion 81 in the radial direction. In the present embodiment, the plurality of protrusions 83 provided in the circumferential direction are provided at predetermined positions in the circumferential direction at positions corresponding to the protrusions 52 on the opposite side to the second rotating member 60. Yes. The third rotating member 80 is made of a metal material such as iron, for example. The third rotating member 80 can be said to be a part of the first rotating member 50 because the third rotating member 80 performs the same movement as the first rotating member 50 in the circumferential rotation.

  The first friction member 71 and the second friction member 72 constituting the friction member are both provided in an annular shape centering on the rotation center Ax, and the diameter width (for example, an annular shape in which the limiter unit 102 is provided) The outer diameter of the protrusions 52 and 83 is about 3 times larger) and is formed in an annular shape. As shown in FIG. 1, the first friction member 71 is sandwiched from both sides between the plate-like wall portion 51 and the first portion 61 a that becomes the overlapping portion of the second rotating member 60. Similarly, the second friction member 72 is sandwiched from both sides between the first portion 61a of the second rotating member 60 and the plate-like wall portion 81 of the third rotating member 60. It is. Each of the first friction member 71 and the second friction member 72 is provided with a plurality of openings 71a and 72a in the circumferential direction which are through holes as shown in FIG. It has been. The plurality of openings 71a are respectively inserted with protrusions 52 provided on the first rotating member 50 corresponding to the positions thereof. Similarly, the third rotating member 80 is inserted into the plurality of openings 72a. The protrusions 83 provided in are respectively inserted. Further, the first friction member 71 and the second friction member 72 are first surfaces 71b and 72b that generate frictional forces as friction surfaces with the second rotating member 60, respectively, and vice versa. Second surfaces 71c and 72c having a friction coefficient different from that of the first surfaces 71b and 72b. The first surfaces 71b and 72b are surfaces that face the first portion 61a of the second rotating member 60 in contact with each other, that is, sliding surfaces on which friction occurs. The second surfaces 71c and 72c are back surfaces located on the opposite side to the first surfaces 71b and 72b. The second surface 71 c faces and contacts the wall portion 51 of the first rotating member 50, and similarly, the second surface 72 c faces the wall portion 81 of the third rotating member 80. Touching. In the present embodiment, for example, the first surface 71b on the second rotating member 60 side by setting the material and surface roughness of the materials used in the first friction member 71 and the second friction member 72, and the like. The friction coefficient of 72b (sliding surface) is slightly higher than the friction coefficient of the second surfaces 71c and 72c.

  In this embodiment, as shown in FIG. 2, a plurality (at least three or more, seven in FIG. 2) of protrusions arranged at regular intervals in the circumferential direction as the plurality of first positioning portions 30. 52, that is, the angle interval S1 (for example, 45 °) between the center of the protrusions 52 adjacent in the circumferential direction with respect to the rotation center Ax is constant, and the angle interval between the adjacent protrusions 52 is constant. At least one protrusion 52d arranged at an angular interval S2 deviated from the interval S1, that is, an angular interval S2 (for example, smaller than 45 °) in FIG. 2 is provided. The angle interval S2 is not ½ of the angle interval S1. In this case, since the protruding portions 52d are provided, the plurality of first positioning portions 30 are not line symmetric with respect to all virtual straight lines P having an arbitrary angle passing through the rotation center Ax. Also, each of the plurality of openings 71a and 71ad of the first friction member 71 is provided at a position that coincides with and overlaps with the corresponding protrusions 52 and 52d when viewed from the axial direction (viewed in the axial direction). ing. That is, the edge part of opening part 71a, 71ad comprises the 2nd positioning part 40 (2nd positioning structure). The plurality of second positioning portions 40 are not line-symmetric with respect to (all) virtual straight lines P having an arbitrary angle passing through the rotation center Ax. Here, although not shown in the figure, in a configuration in which the plurality of protrusions 52 (openings 71a) are simply arranged at equal intervals along the circumferential direction, the first friction member 71 is displaced in the circumferential direction ( The protrusion 52 and the opening 71a are aligned even in the rotation orientation and the reverse (inverted) orientation. In this regard, in the arrangement of the plurality of projecting portions 52 and 52d (opening portions 71a and 71ad) of the present embodiment described above, all the opening portions 71a and 71ad and all the projecting portions are disposed in the posture reversed from the intended posture. 52 and 52d cannot be aligned. Therefore, according to the present embodiment, assembly in a posture other than the predetermined posture, that is, erroneous assembly due to turning over is suppressed.

As described above, although FIG. 2 has been described with the configuration in which the seven protrusions and the openings having the angular interval S1 with the constant angular interval P1 passing through the rotation center Ax are provided, the present invention is not limited to this. . For example, the angle formed by two virtual straight lines P passing through the center of rotation Ax and passing through the centers of adjacent protrusions (openings) is set to a predetermined angle θ1, or the diameter of the positioning portion for positioning the friction member is typified. It is also possible to provide the above-described protrusion (opening) so that the friction member is provided at an intended position with some regularity. In this case, when viewed in the circumferential direction, the distance between adjacent protrusions (openings) and the angle with respect to the rotation center Ax are equal and the plurality of protrusions 52 (openings 71a) provided with regularity are desired. From the fact that it is provided in the regular position of,
It can be defined as a regular positioning part.

  On the other hand, as represented by the protrusion 52d (opening 71ad), at least one protrusion (opening) provided at a position having no regularity when viewed in the circumferential direction is properly positioned. It can be defined in terms of a unique positioning part different from the part.

  In this way, when the friction member 71 is viewed in the circumferential direction, by providing the normal positioning portion and the specific positioning portion at a desired position, for example, the first friction member 71 is attached to the first rotating member 50. When assembling, the position of the normal positioning part and the specific positioning part can be assembled in the intended posture (normal assembly), but the friction member 71 can be assembled with the flipped position of the desired position (incorrect assembly). In this case, the position of the normal positioning portion matches, but the position of the specific positioning portion is shifted from the intended position due to turning over, so that the assembly cannot be performed. From this, erroneous assembly of the friction member 71 is suppressed with a simple configuration in which a unique positioning portion having a position different from that of the normal positioning portion is provided.

  In the present embodiment, the protrusion 83 provided on the third rotating member 80 and the opening 72a of the second friction member 72 are also axially arranged in the same manner as the protrusion 52 and the opening 71a. It arrange | positions so that it may be asymmetrical (non-linear symmetry) with respect to any virtual straight line P which passes along the rotation center Ax by a visual line. In the present embodiment, the first friction member 71 and the first rotating member 50 are integrated by uneven fitting or engagement by aligning the first positioning portion 30 and the second positioning portion 40. In addition, the second friction member 72 and the third rotation member 80 are similarly integrated by uneven fitting or engagement. That is, the first friction member 71 and the second friction member 72 rotate integrally with the first rotation member 50 and the third rotation member 80 around the rotation center Ax. The first friction member 71 and the second friction member 72 are made of, for example, a synthetic resin material containing glass fiber material or synthetic rubber.

  As shown in FIG. 1, a fourth rotating member 90 called a fourth plate or a support plate includes a cylindrical portion 91 and walls 92 and 93 on both sides of the cylindrical portion 91, respectively. Have. The cylindrical portion 91 is configured in a cylindrical shape centered on the rotation center Ax, and is positioned on the outer side in the radial direction from the hook portion 82 of the third rotating member 80. The wall portion 92 (first wall portion) is configured to have an annular shape and a plate shape that protrudes outward in the radial direction from the other end of the cylindrical portion 91 and expands in the radial direction with respect to the rotation center Ax. . The wall portion 92 is provided at the other end of the cylindrical portion 91 and overlaps the wall portion 51 of the first rotating member 50 in the axial direction. The wall portion 92 is provided with a plurality of openings 92a formed by holes at intervals in the circumferential direction. The opening 92a overlaps the opening 51b of the wall 51a in the axial direction. The first rotating member 50 and the fourth rotating member 90 are coupled to, for example, a flywheel or the like provided on the engine side by a coupling tool such as a bolt or a screw passed through the opening 51b and the opening 92a. . In other words, the fourth rotating member 90 rotates integrally around the first rotating member 50 and the rotation center Ax by a coupler (not shown). The wall portion 93 (second wall portion) projects (projects) radially inward from one end of the cylindrical portion 91, and is an annular plate extending in the radial direction perpendicular to the rotation center Ax. Configured. The wall portion 93 is provided at an end portion on one axial side (left side in FIG. 1) of the cylindrical portion 91, and on one side in the axial direction of the wall portion 81 of the third rotating member 80, Overlapping in the axially separated state. The fourth rotating member 90 is also made of a metal material such as iron, for example.

  The third elastic member 33 is positioned between the wall portion 93 of the fourth rotating member 90 and the wall portion 81 of the third rotating member 80, and is separated from the wall portion 93 and the wall portion 81. The elastic force is given in the direction. The third elastic member 33 overlaps the first surfaces 71b and 72b serving as sliding surfaces in the axial direction. The third elastic member 33 includes the second friction member 72, the wall portion 61 of the second rotation member 60, and the wall portion 81 of the third rotation member 80 with the first friction member 71 interposed therebetween. Is pressed against the wall 51 of the first rotating member 50. That is, a frictional force is generated between the second friction member 72 and the second rotating member 60 by the load due to the urging force of the third elastic member 33, and the second rotating member 60 and the first friction member 71. A frictional force is generated between In the present embodiment, the first rotating member 50, the third rotating member 80, and the first rotating member 50 until the torque difference that exceeds the maximum static frictional force between the first friction member 71 and the second friction member 72 is reached. The four rotating members 90 and the second rotating member 60 do not slide. The third elastic member 33 is, for example, an annular (cylindrical) plate spring made of a metal material, and may be a disc spring or a cone spring.

  In the limiter unit 102 that has been correctly assembled by the above configuration, when the torque difference between the input and output of the damper device 100 is smaller than the threshold value within the allowable setting range, the biasing force of the third elastic member 33 is used. The limiter unit 102 does not slip, and the damper device 100 including the damper unit 101 and the limiter unit 102 rotates integrally. On the other hand, when the torque difference between the input and output of the damper device 100 is larger than the threshold value, the frictional force generated by the urging force of the third elastic member 33 in the limiter unit 102, that is, the maximum static frictional force is exceeded. Slip occurs between the surfaces 71b and 72b of the first portion 61a and the first portion 61a as the friction generating portion, and slip occurs between the input and output of the damper device 100. The limiter unit 102 functions as a torque limiter when an excessive torque acts between the input and output of the damper device 100 in this way, and an excessive torque to the output side is generated even if an excessive torque fluctuation occurs on the input side. Transmission is suppressed.

  As described above, in the present embodiment, for example, the plurality of first positioning portions 30 of the first rotating member 50 and the plurality of second positioning portions 40 of the first friction member 71 are respectively viewed in the axial direction. Are arranged so as to be asymmetric (non-linearly symmetric) with respect to any virtual straight line P passing through the rotation center Ax. Therefore, according to this embodiment, for example, the first friction member other than the correct assembly position (posture) due to the asymmetry of the plurality of first positioning portions 30 and the asymmetry of the plurality of second positioning portions 40. 71 cannot be assembled to the first rotating member 50. Therefore, according to the present embodiment, for example, assembly in a posture other than the correct predetermined posture, that is, erroneous assembly of the first friction member 71 and the second friction member 72 with a simple configuration without increasing the cost. , Surely suppressed.

  Moreover, in this embodiment, the 1st friction member 71 is comprised by the annular | circular shape and plate shape, for example. Therefore, according to the present embodiment, for example, due to the asymmetry of the arrangement of the plurality of first positioning portions 30, erroneous assembly of the first friction member 71 configured in an annular shape and a plate shape is suppressed.

  In the present embodiment, for example, the first rotating member 50 and the first friction member 71 correspond to at least three first positioning portions 30 and first positioning portions 30 having different circumferential intervals. A second positioning portion 40 is provided at the position to be operated. Therefore, according to the present embodiment, for example, the alignment between the first positioning unit 30 and the second positioning unit 40 is more accurately performed due to the difference in the circumferential interval at the center of the first positioning unit 30. Or it is easy to be performed more easily.

  In the present embodiment, for example, the case where the projecting portions 52 and 83 (first positioning portion 30) are integrally provided on the first rotating member 50 or the third rotating member 80 is exemplified. The protrusions 52 and 83 (first positioning portion 30) are integrally provided on the second rotating member 60, and the second rotating member 60, the first friction member 71, and the second friction member 72 are the rotation center. It may be configured to rotate integrally around Ax. In this case, the first friction member 71 and the first rotating member 50 slide and the second friction member 72 and the third rotating member 80 slide simultaneously.

  In the present embodiment, for example, the first positioning member is connected to the first rotating member 50 (third rotating member 80) and the first friction member 71 (second friction member 72) constituting the limiter unit 102. 30 and the second positioning part 40 are exemplified, for example, the outer member 10 called the side plate of the damper part 101, the first sliding member 41 (second sliding member 42), for example. ) May be provided with the first positioning part 30 and the second positioning part 40, respectively.

Second Embodiment
The limiter unit 102 according to the present embodiment shown in FIG. 3 has the same configuration as the limiter unit 102 of the first embodiment described above, and the positions of the first positioning unit and the second positioning unit in the first embodiment. The shape is different. Therefore, according to this embodiment, the same effect can be obtained based on the configuration described in the first embodiment.

  That is, in this embodiment, it can be set as the structure shown in FIG. 3, and it demonstrates here taking the 1st friction member 71C as an example. As shown in FIG. 3, the first friction member 71 </ b> C is provided with a plurality of openings 71 n corresponding to the positions where the protrusions 52 of the first rotating member 50 are provided. In the opening 71n, for example, a semicircular cutout is provided in the outer peripheral edge (outer peripheral edge) of the first friction member 71C. The semicircular opening 71n is provided in the circumferential direction with respect to the outer peripheral portion 71x of the first friction member 71C having an annular shape, and is recessed in a semicircular shape toward the inner diameter. The opening 71n accommodates at least a part of the protrusion 52, for example, a half region on the inner diameter side. The positions where the openings 71n (similar to the protrusions 52) are provided are regularly provided at seven (45 ° intervals) in the circumferential direction with respect to the rotation center Ax, and the openings 71nd (projections 52d) are The adjacent opening 71n is provided at an angular position other than 45 °. In this case, the center of the columnar protrusion 52 is positioned on the outer peripheral extension line. In the present embodiment, a plurality of second positioning portions 40C are configured by a plurality of openings 71n having notches on the outer periphery.

  The positions of the first positioning portion 30 typified by the protrusions 52 and 52d and the second positioning portion 40C typified by the openings 71n and 71nd are provided at the first friction member 71C (second friction member). This is different from the first embodiment in that it is provided not on the radial center but on the outer periphery in the shape of a ring. Therefore, according to the present embodiment, for example, since the openings 71n and 71nd are configured as notches provided in the outer peripheral portion 71x of the first friction member 71C, the first friction member 71C has an annular shape. A frictional force can be ensured with the second rotating member 60 with the width in the radial direction, and the width can be reduced as compared with the first embodiment. In the present embodiment, the second friction member described with reference to FIG. 1 can be configured similarly to the first friction member 71C. Moreover, in this embodiment, although the opening parts 71n and 71nd were provided in the 1st friction member 71C and the protrusion parts 52 and 52d were provided in the 1st rotation member 50, the 1st friction member was illustrated. The protrusions 52 and 52d may be provided integrally with the 71C in the axial direction of the rotation center Ax, and the openings 71n and 71nd that are notched in the first rotation member 50 may be directly provided.

<Third Embodiment>
The limiter unit 102 according to the embodiment shown in FIG. 4 has the same configuration as the limiter unit 102 of the first embodiment described above, and shows a modification of the second embodiment. The positions of the positioning part and the second positioning part are mainly different. Therefore, also in this embodiment, the same effect as the first embodiment and the second embodiment can be obtained.

  That is, in the present embodiment, for example, as shown in FIG. 4, the first friction member 71D will be described as an example. The first friction member 71D is provided with a plurality of openings 71o and 71od corresponding to the positions of the plurality of protrusions 52 and 52d provided on the first rotating member 50. The openings 71o and 71od are configured, for example, as semicircular cutouts provided at the peripheral edge (inner peripheral edge) of the first friction member 71D. The openings 71o and 71od are provided on the inner peripheral edge (inner peripheral edge) of the first friction member 71D in an annular shape, and are recessed in a semicircular shape toward the outer side in the radial direction. In the openings 71o and 71od, at least a part of the projecting portion 52, for example, a half region is accommodated. The positions where the openings 71o (similarly the protrusions 52) are provided are regularly provided at seven (45 ° intervals) in the circumferential direction with respect to the rotation center Ax, and the openings 71od (projections 52d) are The adjacent opening 71o is provided at an angular position other than 45 ° so that when the first friction member 71D is turned upside down and assembled to the first rotating member 50, incorrect assembly cannot be performed. In this case, the center of the columnar protrusion 52 is positioned on the outer peripheral extension line. In the present embodiment, a plurality of second positioning portions 40D are configured by the plurality of openings 71o and 71od.

  The arrangement of the plurality of first positioning portions 30 to be the protruding portions 52 and 52d and the plurality of second positioning portions 40D to be the opening portions 71o and 71od in the present embodiment is the same as in the first embodiment. Therefore, the present embodiment can provide the same effects as those of the first embodiment. Further, according to the present embodiment, for example, the openings 71o and 71od are configured as cutouts provided in the inner peripheral portion 71y of the first friction member 71D, and therefore the first friction member 71D has an annular shape. The resulting radial width tends to be thin. In the present embodiment, the second friction member shown in FIG. 1 can be configured similarly to the first friction member 71D. Moreover, in this embodiment, although the opening parts 71o and 71od were provided in the inner peripheral part 71y of 1st friction member 71D, and the protrusion parts 52 and 52d were provided in the 1st rotation member 50, it illustrated, The first friction member 71D may be integrally provided with the protrusions 52 and 52d, and the first rotation member 50 may be provided with openings 71o and 71od by notches.

<Fourth embodiment>
The limiter unit 102 according to the embodiment shown in FIG. 5 differs in structure and shape from the limiter unit 102 of the first embodiment described above, but the same effect based on the same configuration as the first embodiment can be obtained. .

  That is, in this embodiment, for example, as shown in FIG. 5, the first friction member 71 </ b> F has a plurality of openings 71 r and 71 rd corresponding to the protrusions 54 and 54 d of the first rotating member 50. Is different from the first to third embodiments in that it is provided in a unique shape. In the present embodiment, the protrusions 54 and 54d (corresponding to the protrusions 52 and 52d shown in FIG. 1) and the openings 71r and 71rd are the same in one direction (for example, the direction of the vertical line shown in FIG. 5). Is inclined by a predetermined angle (for example, 45 °). The plurality of protrusions 54 and 54d and the plurality of openings 71r and 71rd are parallel to each other. The protrusions 54 and 54d are configured in a flat rectangular parallelepiped shape, and the openings 71r and 71rd are configured as elliptical long holes into which the protrusions 54 and 54d are inserted and fitted. The positions where the openings 71r are provided (center positions of the openings 71r) are regularly provided at seven (45 ° intervals) in the circumferential direction with respect to the rotation center Ax, and the openings 71rd (of the openings 71rd). The center position) is provided at an angular position other than 45 ° from the adjacent opening 71r (center position of the opening 71rd), and the first friction member 71F is turned over and assembled to the first rotating member 50. It prevents mis-assembly. Also in the present embodiment, the first positioning portion 30B is configured by the protrusions 54 and 54d, and the second positioning portion 40F is configured by the openings 71r and 71rd.

  In the present embodiment, the plurality of first positioning portions 30B and the plurality of second positioning portions 40F are inclined in one direction, for example, all in the same direction with respect to the vertical direction, and are arranged out of a fixed interval. Since the protrusion 54d and the opening 71rd are provided, the plurality of first positioning portions 30B and the plurality of second positioning portions 40F are both (all) virtual at any angle passing through the rotation center Ax. The straight line P is not line symmetric. Therefore, also in this embodiment, all the openings 71r and 71rd and all the protrusions 54 and 54d are aligned in a posture reversed from the intended posture or in a posture shifted in the circumferential direction from the intended posture. The first friction member 71F cannot be assembled. Therefore, also in this embodiment, assembly in a posture other than the predetermined posture, that is, erroneous assembly is suppressed. In the present embodiment, the second friction member 72 shown in FIG. 1 can be configured similarly to the first friction member 71F.

<Fifth Embodiment>
The limiter unit 102 according to the embodiment shown in FIG. 6 includes a first friction member 71 (second friction member 72) of the limiter unit 102 of the first embodiment having an annular shape, and a plurality of limiter units 102 in the circumferential direction. The configuration provided in each plate divided into four (for example, four) and the openings 71a and 71d are different, and this embodiment is also based on the same configuration as the first embodiment. The effect is obtained.

  That is, in this embodiment, as shown in FIG. 6, a plurality (four in one example) of first friction members 71A having the same shape (same specifications and same parts) are combined and assembled in the circumferential direction. They are lined up to form an annular shape as a whole. In FIG. 6, for the sake of explanation, the first friction members 71 adjacent in the circumferential direction are exaggerated and separated from each other, but actually there is no large gap, and the first friction member 71A is Are combined to form an annular shape as a whole. The first friction member 71A is provided with a plurality of openings 71a and 71d at positions corresponding to the positions of the protrusions 52 of the first rotating member 50, respectively. The opening 71a is configured as, for example, a through hole that penetrates the first friction member 71A. The opening 71d is, for example, 1 / of the radial width around the center of the radial width of the peripheral edge extending in the radial direction at the circumferential end (90 ° position) of the first friction member 71A. Notches having a diameter of about 3 are formed at both ends in the circumferential direction. The openings 71d are provided at both ends of the first friction member 71A in the circumferential direction every 90 °, and are recessed in a semicircular shape with respect to the center in the circumferential direction. The protrusion 52 of the first rotating member 50 described above in the first embodiment is inserted between the opening 71a and the two openings 71d and 71d (notches) facing each other in the circumferential direction. This embodiment is different from the first embodiment in that the second positioning portion 40A is configured by the divided edges of the opening 71d.

  In the present embodiment, the first friction member 71 of the first embodiment illustrated in FIG. 2 is represented by an imaginary straight line passing through the rotation center Ax, for example, two imaginary straight lines in FIG. The structure is divided into four parts. For this reason, also in the present embodiment, all the openings 71a and 71d are aligned with the protrusions 52 in a posture deviated from the intended posture in the circumferential direction or in a posture reversed from the intended posture. I can't. Therefore, also in this embodiment, assembly in a posture other than the predetermined posture, that is, erroneous assembly is reliably suppressed with a simple configuration in which the friction member 71 shown in FIG. 1 is divided into a plurality of parts.

  In the present embodiment, the protrusion 52 of the first rotating member 50 is inserted between the openings 71d and 71d (formed in the notch) that are opposed to each other in the circumferential direction. As a result, for example, manufacturing variations and dimensional variations of the protrusion 52 serving as the first positioning unit 30 are easily absorbed. Therefore, for example, the alignment between the first positioning portion 30 and the second positioning portions 40, 40A is easily performed more smoothly or more accurately. In the present embodiment, the first friction member 71A may be fixed integrally with the first rotating member 50 by, for example, an adhesive. Further, in the present embodiment, even in the second friction member (not shown in the present embodiment, see FIG. 1), it is integrated with the third rotating member 80 and the like in the same manner as the first friction member 71A. It is also possible to fix.

<Sixth Embodiment>
A limiter unit 102 according to the present embodiment shown in FIG. 7 is a modification of the fifth embodiment based on the configuration of the first embodiment described above. Therefore, according to this embodiment, the same effect based on the same configuration as that of the first embodiment can be obtained.

  That is, also in this embodiment, as shown in FIG. 7, a plurality of (for example, four) first friction members 71B having the same shape (same specifications and same parts) are arranged in the circumferential direction, and the first friction members 71B are arranged. Are combined to form an annular shape (divided annular shape) as a whole. However, in this embodiment, as illustrated in FIG. 7, the first rotating member 50 is provided with at least two types of protrusions 52 and 53 having different shapes. Specifically, for example, as shown in FIG. 7, the area (diameter, opening width) of the diameter of the protrusion 53 on one plane is configured to be smaller than the area of the diameter (diameter, opening width) of the protrusion 52. Has been. The first friction member 71B is provided with at least two types of openings 71a and 71m having different shapes from each other at positions corresponding to the protrusions 52 and 53, respectively. That is, an opening 71a into which the protrusion 52 can be inserted is provided corresponding to the position where the protrusion 52 is provided, and similarly, the protrusion 53 can be inserted corresponding to the position where the protrusion 53 is provided. An opening 71m is provided. And the area (diameter, opening width) in one plane of the opening part 71m is comprised smaller than the area (diameter, opening width) of the protrusion part 52. FIG. That is, the opening 71m is configured to be so small that the protrusion 52 cannot be inserted. In the present embodiment, a plurality of first positioning portions 30A are constituted by the plurality of protrusions 52, 53 as a whole, and a plurality of second positioning portions 40B are constituted by the edges of the plurality of openings 71a, 71m. Yes. In this case, the openings 71a and 71m into which the protrusions 52 and 53 are inserted are preferably provided for each of the divided plates corresponding to the positions of the protrusions 52 and 53.

  In the present embodiment, due to the arrangement and shape of the plurality of protrusions 52 and 53, the plurality of first positioning portions 30A are not line symmetric with respect to an arbitrary virtual straight line P passing through the rotation center Ax. In the first friction member 71B, due to the arrangement and shape of the plurality of openings 71a and 71m, the plurality of second positioning portions 40B are not line symmetric with respect to an arbitrary virtual straight line P passing through the rotation center Ax. Therefore, also in this embodiment, in the posture reversed from the intended posture or the posture shifted in the circumferential direction from the intended posture, all the openings 71a and 71m and all the protruding portions 52 and 53 are aligned. Cannot be assembled. Therefore, also in this embodiment, assembly in a posture other than the predetermined posture, that is, erroneous assembly is suppressed.

  Further, according to the present embodiment, for example, due to the difference in shape between the two first positioning portions 30A (projections 52 and 53) and the difference in shape between the two second positioning portions 40B (openings 71a and 71m). Even if it is disposed in an incorrect posture, insertion of the protrusion 52 into the opening 71m, that is, erroneous assembly is suppressed. In the present embodiment, the second friction member 72 shown in FIG. 1 can be configured similarly to the first friction member 71B in FIG.

<Seventh embodiment>
The limiter unit 102 according to the embodiment shown in FIG. 8 has the same configuration as the limiter unit 102 of the first embodiment described above, and a part of the friction member has a different shape. The same effect based on the same configuration as that of the first embodiment can be obtained.

  That is, in the present embodiment, for example, as shown in FIG. 8, the first friction member 71 </ b> E corresponds to the positions where the plurality of protrusions 52 of the first rotating member 50 are provided. A plurality of openings 71p serving as openings are provided. The opening 71p is configured as a recess opened toward the first rotating member 50 side. A plurality of openings 71q serving as second openings are provided on the opposite side of the first friction member 71E from the openings 71p, corresponding to the positions where the respective openings 71p are provided. The opening 71q is configured as a recess opened toward the third rotating member 80 side in the axial direction. In this configuration, the diameter (diameter, opening width) of the cross section of the opening 71q is configured to be smaller than the diameter (diameter, opening width) of the cross section of the protrusion 52, and the opening 71p and the opening 71q are in the axial direction. It communicates in a state of penetrating into the. In the present embodiment, the second positioning portion 40E is configured by the edge of the opening 71p. Therefore, according to the present embodiment, for example, when the first friction member 71E is turned upside down, the protrusion 52 cannot enter the opening 71q due to the difference in diameter between the openings 71p and 71q. Assembling is impossible. Therefore, also in this embodiment, assembly in a posture other than the predetermined posture, that is, erroneous assembly of the first friction member 71E is suppressed. Further, according to the present embodiment, for example, when the first friction member 71E is assembled to the first rotating member 50, it is easy to determine whether the protrusion 52 can be assembled through the size of the diameter of the opening 71q. Can be visually recognized. Therefore, according to the present embodiment, for example, the alignment operation is easily performed with higher accuracy. In the present embodiment, the second friction member 72E can be configured similarly to the first friction member 71E. In the present embodiment, the first friction member 71E is provided with the openings 71p and 71q, and the first rotation member 50 is provided with the protrusion 52. However, the first friction member 71E includes the first friction member 71E. The protrusion 52 may be provided, and the first rotating member 50 may be provided with the openings 71p and 71q. This configuration can also be applied to the first friction member 71 and the second friction member 72 that are annular or split annular.

<Eighth Embodiment>
The limiter unit 102 according to the present embodiment shown in FIG. 9 has the same basic configuration as the limiter unit 102 of the first embodiment described above, and positions the first friction member 71G (second friction member 72G). The shapes to be obtained are different, and the same effect based on the same configuration as that of the first embodiment can be obtained by this embodiment.

  That is, in the present embodiment, for example, as shown in FIG. 9, a plurality of openings 55 are provided in the first rotating member 50, and the first rotating member 50 is disposed on the first friction member 71 </ b> G side. Corresponding to the position where the protrusion 55 is provided, a plurality of protrusions 71s are provided integrally with the first friction member 71G. The protrusion 71s protrudes from the second surface 71c of the first friction member 71G opposite to the second rotation member 60 toward the first rotation member 50. In the present embodiment, the opening 55 constitutes the first positioning portion 30C, and the protrusion 71s constitutes the second positioning portion 40G. Therefore, according to the present embodiment, for example, the first surface 71b serving as the friction surface and the second surface 71c on the back side of the friction surface are formed in a side surface shape by the protrusion 71s provided on the first friction member 71F. It is easy to identify instantly and simply by looking. Therefore, for example, erroneous assembly of the front and back of the first friction member 71F can be further suppressed. In the present embodiment, the second friction member 72G can be configured similarly to the first friction member 71G. This configuration can also be applied to the first friction member 71 and the second friction member 72 that are annular or split annular.

<Ninth Embodiment>
The limiter unit 102 according to the present embodiment shown in FIG. 10 is different from the first embodiment in the shapes of the first friction member 71H and the second friction member 72H of the limiter unit 102 of the first embodiment. It has the same configuration. Therefore, according to this embodiment, the same effect based on the same configuration as that of the first embodiment can be obtained.

  That is, in the present embodiment, for example, as shown in FIG. 10, the first friction member 71 </ b> H is provided with a plurality of openings 71 t corresponding to the protrusions 52 provided on the first rotating member 50. It has been. The opening 71t is configured as a recess opened toward the first rotating member 50 side. In the present embodiment, the opening 71t constitutes the second positioning portion 40H that does not penetrate. Therefore, according to the present embodiment, for example, the first surface 71b serving as the friction surface and the second on the back side of the friction surface are formed by the non-penetrating recessed opening portion 71t provided in the first friction member 71H. By simply looking at the side surface shape of the surface 71c, it can be easily specified instantly. Therefore, for example, erroneous assembly of the front and back surfaces of the first friction member 71H can be further suppressed. In the present embodiment, the second friction member 72H can be configured similarly to the first friction member 71H. Similarly, this configuration can also be applied to the first friction member 71 and the second friction member 72 having an annular shape or a split annular shape.

<Tenth Embodiment>
The limiter unit according to the embodiment shown in FIG. 11 has the same configuration as that of the first embodiment, although the configuration of the limiter unit 102 of the first embodiment described above is different. Therefore, according to this embodiment, the same effect based on the same configuration as that of the first embodiment can be obtained.

  That is, in this embodiment, for example, as shown in FIG. 11, the positions of the first rotating member 50 and the third rotating member 80 provided with the first friction member 71I and the second friction member 72I are stepped. A concave portion 56 that is recessed toward the other side in the axial direction is provided on the inner side where the second rotating member 60 is located, and the concave portion 56 of the first rotating member 50 is provided in the first friction member 71I. Corresponding to the position, a protrusion 71u is provided. Therefore, according to the present embodiment, for example, the first surface 71b functioning as the friction surface and the second surface on the back side with respect to the friction surface by the protruding portion 71u provided integrally with the first friction member 71I. 71c is easily identified simply by looking at the shape. Therefore, for example, erroneous assembly of the front and back surfaces of the first friction member 71I can be further suppressed. In the present embodiment, the stepped concave portion 56 and the protruding portion 71u can be configured in an annular shape. Also, the second friction member 72I can be configured similarly to the first friction member 71I. Similarly, this configuration can also be applied to the first friction member 71 and the second friction member 72 having an annular shape or a split annular shape.

  As mentioned above, although embodiment of this invention was illustrated, the following characteristic structures can also be limited. For example, the first friction member 71 (second friction member 72) includes a plurality of regular openings 71a provided at equal intervals in the circumferential direction with respect to the rotation center Ax, and the openings 71a. There are non-regular openings 71ad provided at positions that are not equally spaced, and these become the second positioning portions. Further, for example, the center of the first positioning portion is positioned on the outer peripheral portion 71x or the inner peripheral portion 71y of the first friction member 71 (second friction member 72) having an annular shape. In addition, for example, by arranging a plurality of divided annular first friction members 71 (second friction members 72) in the circumferential direction, adjacent first friction members (second friction members) around A peripheral end opening 71d is formed by the end in the direction, and an intermediate opening 71a is provided between the peripheral end openings 71d.

  Moreover, the said embodiment is an example to the last, Comprising: It is not intending limiting the range of invention. These embodiments 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. These embodiments are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof. In addition, the specifications of each component (structure, type, direction, shape, size, length, width, thickness, height, number, arrangement, position, material, etc.) should be changed as appropriate. Can do. For example, the present invention can be applied to friction buffer devices other than the limiter unit and the damper unit. In addition, the first positioning portion and the second positioning portion may have any configuration (for example, shape, size, length, number) as long as it is asymmetric (non-symmetrical with respect to an arbitrary line) in the line of sight from the axial direction. , Arrangement, etc.).

  30 (30A-30C) ... 1st positioning part (1st positioning structure), 40 (40A-40H) ... 2nd positioning part (2nd positioning structure), 50 ... 1st rotation member, 52, 52d, 54, 54d ... projecting part (first positioning part), 60 ... second rotating member, 61a ... first part (overlapping part), 71 ... first friction member (friction member), 71a, 71ad ... opening (second opening), 71d, 71n, 71nd, 71o, 71od ... opening (notch, second positioning part), 71p ... opening (first opening), 71q ... opening ( Second opening), 71r, 71rd ... opening (long hole, second opening), 71x ... peripheral edge (outer peripheral part), 71y ... peripheral edge (inner peripheral part), 72 ... second Friction member (friction member), 100 ... damper device, 101 ... damper part, 102 ... limiter part (friction Shock absorber), Ax ... rotation center, P ... virtual straight line, S1 ... first interval, S2 ... second interval.

Claims (8)

A first rotating member rotatable around a center of rotation;
A second rotating member that has an overlapping portion that overlaps the first rotating member and the axial direction of the rotation center, and is rotatable about the rotation center with respect to the first rotating member;
Positioned on one of the first rotating member and the second rotating member, and is sandwiched between the first rotating member and the overlapping portion and generates a frictional force on the friction surface between the other. A friction member,
A plurality of first positioning portions provided on the first rotating member and arranged asymmetrically with respect to any virtual straight line passing through the center of rotation when viewed in the axial direction;
Corresponding to the position of the first positioning portion provided on the friction member, each aligned with the first positioning portion, and asymmetric with respect to any imaginary straight line passing through the rotation center in the axial direction. And a plurality of second positioning portions arranged in the same manner. The friction member is configured in an annular shape,
The friction buffer device according to claim 1, wherein the second positioning portion is provided in either the annular inner portion or the peripheral portion.   The friction buffer device according to claim 2, wherein the second positioning portion is provided with a notch in which a part of the first positioning portion is accommodated in the peripheral portion.   The friction buffer device according to claim 1, wherein the second positioning portion is configured as a long hole inclined in the same direction. The friction member is configured in a split annular shape,
The friction buffer device according to claim 1, wherein the plurality of friction members are arranged side by side in the circumferential direction. The first rotating member is provided with at least three first positioning portions having different circumferential intervals from each other,
The friction buffer according to any one of claims 1 to 5, wherein each of the second rotating members is provided with the second positioning portion corresponding to a position where the first positioning portion is provided. apparatus. The first rotating member is provided with at least two first positioning portions having different shapes from each other,
The friction buffer device according to claim 5, wherein each of the second rotating members is provided with the second positioning portion corresponding to a position where the first positioning portion is provided. One of the first positioning portion and the second positioning portion is provided with a protruding portion protruding to the other side of the first positioning portion and the second positioning portion,
On the other side, a first opening that is opened toward the one side and the protrusion enters, and a position opposite to the first opening that is located on the opposite side of the first opening. The friction buffer device according to claim 1, further comprising a second opening portion that is opened and cannot accommodate the protruding portion.

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