JP2014152836A - Dynamic vibration absorber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dynamic vibration absorber readily reducing noise and vibration.SOLUTION: A dynamic vibration absorber presents uneven shape corresponding a plurality of recesses 20f, and comprises a guide member 5 (restriction member) having a wall section 5b (restriction section) restricting radially inward displacement of a plurality of rollers 3. The guide member 5 having the wall section 5b can restrict radially inward displacement of the rollers 3, reducing noise and vibration caused by displacement of the rollers 3.

Description

  Embodiments described herein relate generally to a dynamic vibration absorber.

  2. Description of the Related Art Conventionally, there is known a dynamic vibration absorber in which a plurality of rollers are positioned in the circumferential direction and a roller can roll (swing) to absorb torque fluctuation (for example, Patent Document 1).

International Publication No. 2012/032964

  However, in this type of dynamic vibration absorber, there is a case where the moved roller hits another part to generate sound and vibration.

  As an example, the dynamic vibration absorber according to the embodiment forms an annular storage chamber along the circumferential direction of the rotation shaft, and is recessed outside the radial direction of the rotation shaft in the radial direction of the rotation chamber. A case having a plurality of curved portions positioned along a direction, and a plurality of cases that are accommodated in the storage chamber, are positioned along the circumferential direction, and roll in the circumferential direction in contact with the curved portions. The roller and the plurality of rollers are integrally supported in a state of being spaced apart from each other in the circumferential direction, the support member is movable in the circumferential direction of the rotating shaft together with the plurality of rollers, and the curved surface portions A suppressing member having a corresponding uneven shape and having a suppressing part that suppresses displacement of the plurality of rollers inward in the radial direction. Therefore, according to the embodiment, as an example, the inward displacement of the roller in the radial direction can be suppressed by the suppressing member having the suppressing portion. Therefore, as an example, it is easy to suppress the generation or increase of sound and vibration due to the displacement of the roller.

  Moreover, in the said dynamic vibration absorber, as an example, the said suppression member suppresses the displacement to the said axial direction of the said roller. Therefore, as an example, the occurrence or increase of sound or vibration due to the displacement of the roller is further suppressed.

  In the dynamic vibration absorber, as an example, at least a part of the roller is interposed between the support member and the suppression member. Therefore, as an example, the displacement or inclination of the roller is suppressed, and it is easy to suppress the generation or increase of sound or vibration due to the displacement or inclination.

  Moreover, in the dynamic vibration absorber, as an example, the roller has a protruding portion that protrudes along the central axis at the position of the central axis of the rolling, and the support member includes the protruding portion in the radial direction. Support to move. Therefore, as an example, the support member can support the roller with a relatively simple configuration.

  Moreover, in the said dynamic vibration absorber, the recessed part along the circumferential direction is provided in the outer peripheral part of the said roller as an example, and the said suppression member is inserted in the said recessed part. Therefore, as an example, the inclination of the roller is easily suppressed.

  Moreover, in the said dynamic vibration absorber, as an example, the said suppression member has a movement suppression part which suppresses the movement with respect to the said case. Therefore, as an example, the occurrence of inconvenience due to the suppression member moving relative to the case is suppressed.

  Moreover, in the said dynamic vibration damper, the said suppression member is comprised with a synthetic resin material as an example. Therefore, as an example, the impact caused by the movement of the roller is more easily absorbed.

  Moreover, in the said dynamic vibration damper, as an example, the part in which the said curved surface part of the said case was provided is comprised with a metal material. Therefore, as an example, the curved surface portion and the roller are not easily worn.

FIG. 1 is a schematic diagram showing a schematic configuration of an example of an apparatus provided with the dynamic vibration absorber according to the first embodiment. FIG. 2 is a perspective view of the example of the dynamic vibration absorber according to the first embodiment with the second member removed. FIG. 3 is an exploded perspective view of an example of the dynamic vibration absorber according to the first embodiment. FIG. 4 is a cross-sectional view along the rotation axis of an example of the dynamic vibration absorber according to the first embodiment. FIG. 5 is a diagram illustrating an example of a position of the dynamic vibration absorber according to the first embodiment during the rolling of the roller. FIG. 6 is a view showing another example of the position of the dynamic vibration absorber according to the first embodiment during the rolling of the roller. FIG. 7 is a view showing still another example of the position of the dynamic vibration absorber according to the first embodiment during the rolling of the roller. FIG. 8 is a cross-sectional view of a roller as an example of a dynamic vibration absorber according to the first embodiment. FIG. 9 is a cross-sectional view of a modified example of the roller of the dynamic vibration absorber according to the first embodiment. FIG. 10 is a cross-sectional view along the rotation axis of an example of the dynamic vibration absorber according to the second embodiment. FIG. 11 is a cross-sectional view of an example of a dynamic vibration absorber according to the second embodiment. FIG. 12 is a cross-sectional view of a modified example of the roller of the dynamic vibration absorber according to the second embodiment. FIG. 13 is a cross-sectional view taken along the rotational axis of an example of a dynamic vibration absorber according to the third embodiment. FIG. 14 is a cross-sectional view of the example of the dynamic vibration absorber according to the fourth embodiment along the rotation axis. FIG. 15 is a cross-sectional view along the rotation axis of an example of the dynamic vibration absorber according to the fifth embodiment.

  The following plurality of embodiments and modifications include the same configuration. Similar components are denoted by common reference numerals, and redundant description is omitted.

<First Embodiment>
In the present embodiment, as an example, as shown in FIG. 1, the dynamic vibration absorber 1 </ b> A (torque fluctuation suppressing device) is connected to the rotating portion 101 (shaft, crankshaft, output shaft) of the internal combustion engine 100 together with the damper 120. Has been. The dynamic vibration absorber 1 </ b> A and the damper 120 can absorb (reduce, suppress) torque fluctuations generated in the rotating unit 101. The dynamic vibration absorber 1A has a plurality of rollers 3 (mass body, weight, see FIGS. 2 and 3, etc.) capable of rolling (swinging) inside. The dynamic vibration absorber 1A absorbs (suppresses) torque fluctuations by the inertia of the plurality of rollers 3 when rotating. In the present embodiment, as an example, the dynamic vibration absorber 1 </ b> A is provided in the case 111 of the transmission 110.

  In this embodiment, as an example, as shown in FIGS. 2 to 4, the dynamic vibration absorber 1 </ b> A includes a case 2, a roller 3, a support member 4 (support portion), a guide member 5 (a suppression member, a suppression portion). ) Etc.

  In this embodiment, as an example, as shown in FIGS. 3 and 4, the case 2 is configured by combining a first member 21 and a second member 22. The first member 21 has wall portions 20a to 20c. The wall portion 20a (end wall) is formed in an annular and plate shape with the rotation axis Ax as the center. Moreover, the wall part 20a is comprised by the strip | belt shape along the circumferential direction of rotating shaft Ax. The wall portion 20b (peripheral wall, inner peripheral wall) extends along the axial direction from the radially inner end of the rotation axis Ax of the wall portion 20a. The wall part 20b is comprised by the cylindrical shape centering on the rotating shaft Ax. The wall portion 20c (peripheral wall, outer peripheral wall) extends along the axial direction from the radially outer end of the rotation axis Ax of the wall portion 20a. The wall 20c is configured in a cylindrical shape centered on the rotation axis Ax. These wall parts 20a-20c exhibit U-shaped cross-sectional shape in the cross section along radial direction and an axial direction. That is, the wall portions 20a to 20c constitute an annular groove portion around the rotation axis Ax.

  The second member 22 has a wall portion 20d. The wall portion 20d (end wall) is formed in an annular and plate shape with the rotation axis Ax as the center. The wall portion 20d is configured in a band shape along the circumferential direction of the rotation axis Ax. The wall portion 20d is positioned at a distance from the wall portion 20a in the axial direction of the rotation axis Ax.

  In the present embodiment, as an example, the radially outer (outer peripheral) ends of the first member 21 and the second member 22 and the radially inner (inner peripheral) ends are coupled to each other. They are connected (connected) by means of a tool (eg a screw, not shown). In this way, the first member 21 and the second member 22 are integrated to form the case 2. In the case 2, an annular storage chamber 23 surrounded by the walls 20a to 20d is formed. The case 2 is entirely made of a metal material (for example, an iron-based material). It should be noted that the combination of members constituting the case 2 can be variously changed.

  As shown in FIGS. 2 to 4, a plurality of rollers 3 are accommodated in the accommodation chamber 23. The plurality of rollers 3 are positioned at substantially constant intervals (angular intervals around the rotation axis Ax) along the circumferential direction. In the present embodiment, as an example, the roller 3 includes a rolling part 3a (columnar part) and a protruding part 3b (protrusion, shaft part, shaft part) as shown in FIGS. The rolling part 3a is configured in a cylindrical shape. The outer peripheral surface of the rolling portion 3a is a surface 3c (contact surface) that contacts the surface 20e of the wall portion 20c. The protruding portion 3b protrudes in a cylindrical shape along the axial direction of the central axis Axr at a position where the central axis Axr (rolling center, rolling axis) of the rolling portion 3a is provided.

  In the present embodiment, as an example, as shown in FIGS. 3 to 5, the surface 20 e (inner surface) of the wall portion 20 c of the case 2 is recessed (recessed) in the radial direction outward (recessed). , A concave curved surface) and a convex portion 20g (convex surface, convex curved surface) projecting (protruding) radially inward. The concave portions 20f and the convex portions 20g are alternately arranged in the circumferential direction at substantially constant intervals (angular intervals around the rotation axis Ax). Further, both the concave portion 20f and the convex portion 20g are configured as curved surfaces along the axial direction of the rotation axis Ax (direction perpendicular to the paper surface of FIG. 5). The radius of curvature of the recess 20f is larger than the radius of the rolling part 3a of the roller 3, and the radius of curvature of the convex part 20g is smaller than the radius of the rolling part 3a, but may be larger. Further, the concave portion 20f and the convex portion 20g are smoothly continuous. The concave portion 20f and the convex portion 20g are surfaces (contact surface, pressing surface) that are in contact with the surface 3c of the roller 3. As shown in FIG. 1, the dynamic vibration absorber 1 </ b> A rotates around the rotation axis Ax. Therefore, the roller 3 receives a centrifugal force and is pressed against the surface 20e. Further, the roller 3 can roll on the concave portion 20f or the convex portion 20g, that is, in contact with the concave portion 20f or the convex portion 20g in accordance with the rotational fluctuation (acceleration or deceleration, change in angular acceleration). .

  In the present embodiment, as an example, as illustrated in FIG. 4, the support member 4 is positioned adjacent to the inside of the accommodation chamber 23 of the wall portion 20 d. The support member 4 overlaps the wall portion 20d and extends (expands) along the wall portion 20d. Further, as shown in FIG. 3, the support member 4 has a wall portion 4a configured in an annular and plate shape. The wall portion 4a is provided with a plurality of openings 4b (through holes as an example in the present embodiment) at substantially constant intervals (angle intervals around the rotation axis Ax) along the circumferential direction. As shown in FIGS. 5 to 7, the opening 4 b is provided in the shape of a long hole extending (long) along the radial direction of the rotation axis Ax. The protrusion 3b of the roller 3 is inserted into the opening 4b in a state of being incorporated in the dynamic vibration absorber 1A. The width of the opening 4b is slightly larger than the diameter of the protrusion 3b. Therefore, in this embodiment, as an example, the support member 4 supports the plurality of rollers 3 in a state of being spaced apart from each other at least in the circumferential direction of the rotation axis Ax. In other words, the plurality of rollers 3 are integrally supported by the support member 4. That is, the plurality of rollers 3 and the support member 4 can move integrally in the circumferential direction of the rotation axis Ax. That is, in the case 2, the plurality of rollers 3 and the support member 4 are subassemblies, and can rotate integrally with the case 2 around the rotation axis Ax. At this time, in a state where the roller 3 is in contact with the recess 20f, the protruding portion 3b of the roller 3 is positioned in the vicinity of the radially outer end of the opening 4b. Further, in a state where the roller 3 is in contact with the convex portion 20g, the protruding portion 3b of the roller 3 is positioned in the vicinity of the radially inner end of the opening 4b.

  In the present embodiment, as an example, as illustrated in FIG. 4, the guide member 5 is positioned adjacent to the inside of the accommodation chamber 23 of the wall portion 20 a. The guide member 5 overlaps the wall portion 20a and extends (expands) along the wall portion 20a. In the present embodiment, as an example, the roller 3 is interposed between the support member 4 and the guide member 5. That is, in this embodiment, as an example, the support member 4 and the guide member 5 can suppress the displacement of the roller 3 in the axial direction. Further, the support member 4 and the guide member 5 can suppress the inclination (falling) of the roller 3. Further, the surfaces 3d and 3e (end surfaces) of the rolling part 3a of the roller 3 can contact the surface 4c of the support member 4 and the surface 5c of the guide member 5, respectively. That is, when the roller 3 rolls on the surface 20e, the surface 3d and the surface 4c rub (slide), and the surface 3e and the surface 5c rub (slide). Therefore, the support member 4 and the guide member 5 can be made of, for example, a synthetic resin material (plastic, engineering plastic, super engineering plastic) that has good slidability and high wear resistance.

  In the present embodiment, as an example, as illustrated in FIGS. 4 and 5, the guide member 5 includes a wall portion 5 a configured in an annular and plate shape. Further, the guide member 5 is configured such that the inner side in the radial direction of the rotation axis Ax is thick and the outer side is thin. And the wall part 5b (a suppression part, a level | step-difference part, a curved surface) is provided in the boundary part of a thick part and a thin part. Moreover, the wall part 5b is exhibiting the uneven | corrugated shape corresponding to the recessed part 20f and the convex part 20g. That is, the wall 5b protrudes radially outward in the radially inner portion of the recess 20f, and is recessed radially inward in the radially inner portion of the protrusion 20g. As is clear from FIGS. 5 to 7, the wall 5 b has a slight (small) gap from the protrusion 3 b of the roller 3 that is in contact with the surface 20 e (the recess 20 f or the protrusion 20 g) at an arbitrary position. And it is configured to be positioned inside in the radial direction. In other words, the wall 5b is an envelope on the radially inner side of the locus of the protrusion 3b of the roller 3 that rolls on the surface 20e (the recess 20f and the protrusion 20g) as seen from the axial direction of the rotation axis Ax. It has a shape (appearance) slightly inward in the radial direction from the (envelope surface). Therefore, the wall 5b can suppress (restrict) the movement of the roller 3 at an arbitrary position in the storage chamber 23, that is, all the rollers 3 to the inner side in the radial direction of the rotation axis Ax. . As shown in FIG. 4, the guide member 5 is provided with a protruding portion 5 d (movement restraining portion). The protrusion 5d is inserted into an opening 20h (in this embodiment, a through hole as an example) provided in the wall 20a of the case 2. By inserting the protrusion 5d into the opening 20h, the guide member 5 is positioned in the case 2 and relative movement with respect to the case 2 is suppressed. The protrusion 5d and the opening 20h are provided at a plurality of locations (for example, three locations, not shown). By suppressing the movement between the guide member 5 and the case 2, it is possible to suppress the occurrence of inconveniences such as noise, vibration, and wear. The configuration for positioning the guide member 5 and the case 2 can be variously changed.

  In the present embodiment, as an example, the wall 5b can guide the movement of the roller 3 when the rotational speed of the dynamic vibration absorber 1A is low and the roller 3 is positioned inside in the radial direction. For this reason, the wall part 5b is comprised as a curved surface which the unevenness | corrugation continued smoothly as an example. In such a configuration, the roller 3 may move away from the surface 20e inward in the radial direction due to rotational fluctuation, gravity, or the like, and may hit the wall 5b. Conversely, the roller 3 may move radially outward from the wall 5b side and hit the surface 20e. In this embodiment, as an example, the wall 5b is close to the envelope (envelope surface) of the locus on the radially inner side of the protruding portion 3b when the roller 3 moves along the surface 20e as described above. Is provided. That is, according to the present embodiment, as an example, the distance (range) in which the roller 3 can move in the radial direction is easily set to be smaller (narrower). Therefore, according to the present embodiment, as an example, the sound and vibration generated by the roller 3 moving in the radial direction are likely to be smaller.

  Furthermore, in this embodiment, as an example, the guide member 5 constituting the wall portion 5b has a lower elastic modulus (lower elastic modulus) than the material (for example, a metal material) constituting the surface 20e (wall portion 20c). ) Material, that is, a softer material (for example, a synthetic resin material).

  Further, in this embodiment, as an example, as shown in FIG. 8, the roller 3 can be configured from one member (for example, a metal material), and as shown in FIG. The roller 3 can be configured by integrating the rolling part 3a and the projecting part 3b (shaft part, shaft) configured as a member (for example, a metal material) by press-fitting or the like.

  As described above, in this embodiment, as an example, the dynamic vibration absorber 1A includes a plurality of concave portions corresponding to the plurality of concave portions 20f (curved surface portions) provided on the radially outer surface 20e of the storage chamber 23. A guide member 5 (suppressing member) having a shape (that is, an uneven shape) and having a wall portion 5b (suppressing portion) that suppresses displacement of the plurality of rollers 3 inward in the radial direction is provided. Therefore, according to this embodiment, as an example, the wall portion 5 b of the guide member 5 can suppress the displacement of the roller 3 inward in the radial direction. Therefore, as an example, it is easy to suppress the generation or increase of sound or vibration due to the displacement of the roller 3. Moreover, in this embodiment, the guide member 5 and the case 2 can be made into another member as an example. In this case, as an example, the guide member 5 having the wall portion 5b is made of a material that easily reduces (suppresses or absorbs) sound and vibration. Therefore, as an example, the functions of the case 2 (for example, rigidity, strength, wear resistance, etc.) and the functions of the guide member 5 (for example, suppression of sound and vibration, reduction of friction coefficient, etc.) are compatible at a higher level. Easy to be.

  Moreover, in this embodiment, the guide member 5 suppresses the displacement to the axial direction of the roller 3 as an example. Therefore, as an example, the generation or increase of sound or vibration due to the displacement of the roller 3 is further easily suppressed.

  In the present embodiment, as an example, at least a part of the roller 3 (in the present embodiment, the rolling portion 3 a as an example) is interposed between the support member 4 and the guide member 5. Therefore, as an example, the displacement and inclination of the roller 3 are easily suppressed. Therefore, as an example, the displacement or inclination of the roller 3 is suppressed, and it is easy to suppress the generation or increase of sound or vibration due to the displacement or inclination.

  Moreover, in this embodiment, the support member 4 supports the protrusion part 3b so that a movement to radial direction is possible as an example. Therefore, as an example, the support member 4 can support the roller 3 with a relatively simple configuration.

Second Embodiment
The dynamic vibration absorber 1B according to the present embodiment has the same configuration as the dynamic vibration absorber 1A according to the first embodiment. Therefore, according to this embodiment, the same effect based on the same configuration as that of the first embodiment can be obtained. The dynamic vibration absorber 1B can be used in place of the dynamic vibration absorber 1A of FIG. However, as an example, the dynamic vibration absorber 1B according to the present embodiment is different from the above embodiment in the configuration of the roller 3B and the arrangement of the support member 4 and the guide member 5 as shown in FIGS. doing. Specifically, the roller 3B is provided with a recess 3f (groove, narrowed portion) from the surface 3c toward the inside in the radial direction. By providing the recess 3f, the roller 3B is configured with a shaft portion 3g along the central axis Axr. And in this embodiment, the shaft part 3g has penetrated the opening part 4b of the supporting member 4 as an example. In addition, two guide members 5 are positioned corresponding to the protruding portions 3b provided on both sides of the roller 3B in the axial direction. That is, in the present embodiment, as an example, the inward movement of the roller 3B in the radial direction is suppressed by the guide members 5 positioned on both sides in the axial direction. In the present embodiment, as an example, the configuration of the roller 3B, the support member 4, and the guide member 5 is symmetric with respect to a plane perpendicular to the rotation axis Ax. Therefore, according to the present embodiment, as an example, the roller 3B is less inclined.

  In this embodiment, as an example, as shown in FIG. 11, two members (for example, a metal material as an example) can be assembled in order from the axial direction to form the roller 3 </ b> B shown in FIG. 10. Then, as shown in FIG. 12, the rolling portion 3a and the protruding portion 3b (shaft portion, shaft) each configured as a separate member (for example, a metal material) are integrated by, for example, press-fitting or the like. Thus, the roller 3B can be configured. When the roller 3B has the configuration of FIG. 12, as an example, the support member 4 is configured by a plurality of radially inner and outer divided bodies (not shown) with the opening 4b as a boundary, and the dynamic vibration absorber 1B When assembled, the divided bodies of the support member 4 may be joined (integrated). When the roller 3B has the configuration shown in FIG. 12, the rolling part 3 a and the protruding part 3 b may be assembled together with the support member 4.

<Third Embodiment>
The dynamic vibration absorber 1C according to the present embodiment has the same configuration as the dynamic vibration absorber 1B according to the second embodiment. Therefore, according to this embodiment, the same effect based on the same configuration as that of the second embodiment can be obtained. The dynamic vibration absorber 1C can be used in place of the dynamic vibration absorber 1A of FIG. However, as shown in FIG. 13, the dynamic vibration absorber 1 </ b> C according to the present embodiment has the configuration of the guide member 5 </ b> C and the arrangement of the support member 4 and the guide member 5 </ b> C as the second embodiment. It is different. Specifically, a guide member 5C (suppression member) is inserted into the recess 3f of the roller 3B. In this embodiment, the guide member 5C is configured in an annular and plate shape as an example, and the outer peripheral wall portion 5b has the same shape as the wall portion 5b shown in FIGS. Yes. And the two support members 4 are located corresponding to the protrusion part 3b provided in the both sides of the axial direction of the roller 3B. That is, in this embodiment, as an example, the guide member 5C is inserted into the recess 3f of the roller 3B. In the present embodiment, as an example, the configurations of the roller 3B, the support member 4, and the guide member 5C are symmetric with respect to a plane perpendicular to the rotation axis Ax. Therefore, according to the present embodiment, as an example, the roller 3B is less inclined.

<Fourth embodiment>
The dynamic vibration absorber 1D according to the present embodiment has the same configuration as the dynamic vibration absorber 1C according to the third embodiment. Therefore, also in this embodiment, the same effect based on the same configuration as that of the third embodiment can be obtained. The dynamic vibration absorber 1D can be used in place of the dynamic vibration absorber 1A of FIG. However, as an example, the dynamic vibration absorber 1D according to the present embodiment is different from the third embodiment in the configuration of the roller 3D as illustrated in FIG. Specifically, the roller 3D is divided into two in the axial direction. Even with the configuration having the two rollers 3D, the same effect as the configuration having the one roller 3C according to the third embodiment can be obtained.

<Fifth Embodiment>
The dynamic vibration absorber 1E according to the present embodiment has the same configuration as the dynamic vibration absorber 1A according to the first embodiment. Therefore, according to this embodiment, the same effect based on the same configuration as that of the first embodiment can be obtained. The dynamic vibration absorber 1E can be used in place of the dynamic vibration absorber 1A of FIG. However, as an example, the dynamic vibration absorber 1E according to the present embodiment is different from the first embodiment in the configuration of the guide member 5E as illustrated in FIG. Specifically, the guide member 5E includes a wall portion 5a and a wall portion 5e that is located outside the roller 3 in the radial direction and is interposed between the roller 3 and the surface 20e. The wall portion 5e extends along the axial direction of the rotation axis Ax from the radially outer end of the wall portion 5a. The wall portion 5 e is in contact with the radially inner surface 20 e of the wall portion 20 c of the case 2. The surface 5f of the wall 5e has the same shape as the surface 20e (see FIG. 5) of the dynamic vibration absorber 1A according to the first embodiment. According to this embodiment, when the roller 3 moves outward in the radial direction, the roller 3 hits the surface 5f (wall portion 5e) of the guide member 5E. Therefore, as an example, the impact is easily absorbed as compared with the configuration in which the roller 3 hits the case 2. Therefore, as an example, it is easy to suppress the generation of sound and vibration.

  As mentioned above, although embodiment and the modification of this invention were illustrated, the said embodiment and modification are an example to the last, Comprising: It is not intending limiting the range of invention. These 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 or modification may be partially exchanged. In addition, specifications (structure, type, direction, shape, size, length, width, thickness, height, number, arrangement, position, material, etc.) of each configuration, shape, display element, etc. It can be changed and implemented. That is, the configuration of the case, the support member, the guide member, the roller, and the like can be appropriately changed and implemented.

  DESCRIPTION OF SYMBOLS 1A-1E ... Dynamic vibration absorber, 2 ... Case, 20f ... Recessed part (curved surface part), 23 ... Storage chamber, 3 ... Roller, 3b ... Projection part, 3f ... Recessed part, 4 ... Support member, 5, 5C, 5E ... Guide Member (suppressing member), 5b... Wall portion (suppressing portion), 5d... Projecting portion (movement suppressing portion), Ax.

Claims (8)

An annular storage chamber is formed along the circumferential direction of the rotation shaft, and a plurality of curved surface portions that are recessed along the outer periphery in the radial direction on the outer side of the rotation shaft in the radial direction are positioned along the circumferential direction. A case with
A plurality of rollers housed in the housing chamber, positioned along the circumferential direction, and rolling in the circumferential direction in a state of being in contact with the curved surface portion;
A support member that integrally supports the plurality of rollers in a state of being spaced apart from each other in the circumferential direction, and a support member that is movable in the circumferential direction of the rotating shaft together with the plurality of rollers;
A suppressing member that has an uneven shape corresponding to the plurality of curved surface portions and has a suppressing portion that suppresses displacement of the plurality of rollers in the radial direction;
Dynamic vibration absorber with   The dynamic vibration absorber according to claim 1, wherein the suppressing member suppresses displacement of the roller in the axial direction.   The dynamic vibration absorber according to claim 1 or 2, wherein at least a part of the roller is interposed between the support member and the suppressing member. The roller has a protruding portion protruding along the central axis at the position of the central axis of the rolling,
The dynamic vibration absorber according to claim 3, wherein the support member supports the protrusion so as to be movable in the radial direction. The outer peripheral portion of the roller is provided with a recess along the circumferential direction,
The dynamic vibration absorber according to claim 1, wherein the suppressing member is inserted into the concave portion.   The dynamic vibration absorber according to claim 1, wherein the suppression member includes a movement suppression unit that suppresses movement with respect to the case.   The dynamic vibration absorber according to claim 1, wherein the suppressing member is made of a synthetic resin material.   The dynamic vibration absorber according to any one of claims 1 to 7, wherein at least a portion of the case where the curved surface portion is provided is made of a metal material.

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