JP2020200881A - Dynamic vibration absorber - Google Patents

Abstract

To provide a dynamic vibration absorber capable of suppressing resonance to not only rotation-directional vibration of a rotary shaft, but also vibration of the rotary shaft in a tilt direction (prying direction) to the center axis of the rotary shaft while suppressing imbalance from being caused.SOLUTION: A stopper 140 has a restriction part 142 which abuts on a filmy part 122 of a sleeve 110 on an outer peripheral surface side to restrict a quantity of radial movement of a vibration ring 130 relative to the sleeve 110, and the restriction part 142 has at least one inclined surface between a one end-side inclined surface 142a which increases an interval with the film part 122 toward one axial end side of the sleeve 110 and an other end-side inclined surface 142b which increases an interval with the filmy part 122 toward the other axial end side, so that the vibration ring 130 and stopper 140 are allowed to move in a direction inclined to the center axis relative to the filmy part 122.SELECTED DRAWING: Figure 1

Description

The present invention relates to a dynamic vibration absorber that suppresses a resonance phenomenon in a plurality of directions on a rotating shaft.

For example, a propeller shaft (rotating shaft) provided in an automobile body is generally provided with a dynamic vibration absorber (dynamic damper) in order to suppress a resonance phenomenon at a specific frequency. In such a dynamic vibration absorber, an annular member such as a hub attached to the propeller shaft, a vibrating ring provided concentrically with the annular member on the outer peripheral surface side of the annular member, and these annular members and a vibrating ring. (See Patent Documents 1 to 3). In the dynamic vibration absorber configured as described above, when vibration at a frequency at which the propeller shaft resonates is transmitted, the vibration ring vibrates, thereby exerting a function of suppressing the resonance of the propeller shaft. In such a dynamic vibration absorber, the vibration ring is designed so as to suppress the resonance of the propeller shaft at least with respect to the vibration in the rotation direction (twisting direction) of the propeller shaft.

However, when the vehicle speed increases and the rotation speed of the propeller shaft increases, the centrifugal force acting on the vibrating ring increases, and the vibrating ring may behave to be separated from the central axis of an annular member such as a hub. Such behavior is commonly referred to as imbalance. When an imbalance occurs, the dynamic vibration absorber cannot fully exert its original vibration suppressing function, and also has a problem that the durability of the elastic body is impaired. Note that the types of vibration transmitted to the propeller shaft may include vibration with a relatively low frequency, and the spring constant of the elastic body may be set low as a countermeasure. In such a case, the problem of imbalance as described above becomes more apparent. Therefore, in order to suppress the occurrence of imbalance, the movement of the vibrating ring with respect to the annular member in the radial direction is restricted so that the vibrating ring does not deviate significantly from the central axis of the annular member such as a hub due to centrifugal force. A stopper may be provided (in particular, see Patent Document 1).

However, for example, during acceleration from the start of the automobile, the propeller shaft is deformed so as to sink once and then returns to the original state, and vibration called wind-up vibration occurs. This vibration is a low-frequency vibration and includes a vibration in a tilting direction (prying direction) with respect to the central axis of the propeller shaft. Therefore, it is desirable to suppress the resonance with respect to this vibration by the dynamic vibration absorber. However, in the conventional stopper structure, the degree of freedom in the moving direction of the vibrating ring is greatly limited. Therefore, when the conventional stopper structure is adopted, the dynamic vibration absorber resonates with respect to both the rotation direction (twisting direction) of the propeller shaft and the vibration in the tilting direction (pry direction) with respect to the central axis of the propeller shaft. It was difficult to suppress.

JP-A-2002-168293 Jikkenhei 1-92545 Japanese Unexamined Patent Publication No. 2012-122493

An object of the present invention is not only vibration in the rotation direction (twisting direction) on the rotation axis but also vibration in the tilt direction (pry direction) on the rotation axis with respect to the central axis of the rotation axis while suppressing the occurrence of imbalance. An object of the present invention is to provide a dynamic vibration absorber capable of suppressing resonance.

The present invention employs the following means to solve the above problems.

The dynamic vibration absorber of the present invention
An annular member attached to the rotating shaft, a vibration ring provided concentrically with the annular member on the outer peripheral surface side of the annular member, an annular elastic body connecting the annular member and the vibration ring, and the vibration. A dynamic vibration absorber that is fixed to a ring and includes a stopper that regulates the amount of movement of the vibrating ring in the radial direction with respect to the annular member.
The stopper has a regulating portion that regulates the amount of movement of the vibrating ring with respect to the annular member in the radial direction by abutting against the regulated portion on the outer peripheral surface side of the annular member.
The regulated portion has an inclined surface on one end side in which the distance from the regulated portion increases as it moves toward one end side in the axial direction of the annular member, and the regulated portion increases toward the other end side in the axial direction of the annular member. By providing the inclined surface of at least one of the inclined surfaces on the other end side in which the interval between the two is widened, the vibrating ring and the stopper are inclined in the direction of inclination with respect to the central axis of the rotating shaft with respect to the regulated portion. It is characterized in that the movement of is allowed.

According to the present invention, the stopper regulates the amount of movement of the vibrating ring with respect to the annular member in the radial direction, so that the occurrence of imbalance can be suppressed. Since the vibrating ring and the stopper are allowed to move in the tilting direction (pry direction) with respect to the central axis of the rotating shaft with respect to the regulated portion on the outer peripheral surface side of the annular member, the rotating shaft is allowed to move by the vibrating ring. Resonance with respect to the vibration of the rotating shaft in the tilting direction (prying direction) can be suppressed.

On the outer peripheral surface side of the annular member, a film-like portion composed of a part of the elastic body is provided over the entire circumference.
The regulated portion may be formed of the film-like portion.

As a result, it is possible to suppress the generation of noise even if the regulated portion of the stopper hits the regulated portion, and it is also possible to prevent the annular member from being scratched.

The one end side inclined surface is composed of an inclined surface whose diameter increases from the other end side toward one end side, and the other end side inclined surface is an inclined surface whose diameter increases from the one end side toward the other end side. It is preferable that the one end side inclined surface and the other end side inclined surface directly intersect with each other.

As a result, even when vibrating in the tilting direction (prying direction), the contact width of the regulated part with the regulated part becomes small, so that the vibration ring and the stopper are sufficiently allowed to move in the tilting direction (prying direction). To.

It is also preferable that the shape of the inner peripheral side of the restricting portion in the cross section of the stopper is a minute straight line, an arc shape, or an elliptical arc shape.

The intersection of the one end side inclined surface and the other end side inclined surface is arranged at a position biased from the center to the side where the main body portion of the elastic body is provided in the axial width of the regulation portion. It is good.

By doing so, the movement of the vibrating ring and the stopper in the inclination direction (pry direction) with respect to the central axis of the rotation axis is more sufficiently allowed.

In addition, each of the above configurations can be adopted in combination as much as possible.

As described above, according to the present invention, while suppressing the occurrence of unbalance, not only the vibration in the rotation direction (twisting direction) on the rotation axis but also the inclination direction (pry) in the rotation axis with respect to the central axis of the rotation axis. Resonance can also be suppressed for vibration in the direction).

FIG. 1 is a broken perspective view of the dynamic vibration absorber according to the first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of the dynamic vibration absorber according to the first embodiment of the present invention. FIG. 3 is a schematic cross-sectional view of the dynamic vibration absorber according to the second embodiment of the present invention. FIG. 4 is a schematic cross-sectional view of the dynamic vibration absorber according to the third embodiment of the present invention. FIG. 5 is a schematic cross-sectional view of the dynamic vibration absorber according to the fourth embodiment of the present invention. FIG. 6 is a schematic cross-sectional view of the dynamic vibration absorber according to the fifth embodiment of the present invention.

Hereinafter, embodiments for carrying out the present invention will be described in detail exemplarily based on examples with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described in this embodiment are not intended to limit the scope of the present invention to those, unless otherwise specified. ..

(Example 1)
The dynamic vibration absorber (dynamic damper) according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a broken perspective view of the dynamic vibration absorber according to the first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of the dynamic vibration absorber according to the first embodiment of the present invention.

<Application example of dynamic vibration absorber>
The dynamic vibration absorber 100 according to the present embodiment can be suitably used, for example, to suppress the resonance of the propeller shaft (rotating shaft) provided in the vehicle body of an automobile. As explained in the background art, the propeller shaft may vibrate in each of the rotation direction (twisting direction) and the tilting direction (prying direction) with respect to the central axis of the propeller shaft. By attaching the dynamic vibration absorber 100 to the propeller shaft, resonance in each of these directions can be suppressed. The dynamic vibration absorber according to the present invention is not limited to such applications, and has resonance in each direction of the rotating shaft with respect to various devices provided with a rotating shaft capable of generating vibration in a plurality of directions as described above. Can be applied to suppress.

<Dynamic vibration absorber>
The dynamic vibration absorber 100 according to this embodiment will be described in more detail. The dynamic vibration absorber 100 according to the present embodiment includes a sleeve 110 as an annular member attached to a rotating shaft such as a propeller shaft, a vibration ring 130 provided concentrically with the sleeve 110 on the outer peripheral surface side of the sleeve 110, and a sleeve. An annular elastic body 120 that connects the 110 and the vibration ring 130 is provided. Further, the dynamic vibration absorber 100 is also provided with a stopper 140 which is fixed to the vibration ring 130 and regulates the amount of movement of the vibration ring 130 in the radial direction with respect to the sleeve 110. The sleeve 110 and the vibrating ring 130 are made of a metal material. Further, the stopper 140 is made of a hard material such as metal or hard resin.

The sleeve 110 according to this embodiment is composed of a cylindrical member. Then, in this embodiment, the dynamic vibration absorber 100 is attached to the rotating shaft by fixing the inner peripheral surface of the sleeve 110 to the outer peripheral surface of the companion flange 200 fixed to the rotating shaft such as the propeller shaft. Be done. However, the annular member in the present invention is not limited to such a sleeve 110. For example, the annular member of the present invention includes a differential gear or a hub itself having an L-shaped cross section that is sandwiched between a flange on the transmission side and a flange of a propeller shaft. In this case, the elastic body 120 is fixed to the hub by fitting or vulcanized and bonded to the outer peripheral surface of the hub.

In this embodiment, the annular elastic body 120 made of a rubber material is obtained by vulcanization molding. The elastic body 120 is vulcanized and adhered to the sleeve 110 and the vibrating ring 130, respectively. As a result, the vibrating ring 130 is fixed to the sleeve 110 via the elastic body 120. The inner peripheral surface side of the elastic body 120 covers the entire outer peripheral surface of the sleeve 110, and the outer peripheral surface side of the elastic body 120 covers the entire inner peripheral surface of the vibrating ring 130. Further, the elastic body 120 has a film-like portion 122 in addition to the main body portion 121 of the elastic body 120 for allowing the relative movement of the vibrating ring 130 with respect to the sleeve 110. That is, on the outer peripheral surface side of the sleeve 110, a film-like portion 122 composed of a part of the elastic body 120 is provided over the entire circumference.

In the dynamic vibration absorber 100, when vibration of a frequency at which the rotating shaft resonates is transmitted, the vibration ring 130 and the stopper 140 vibrate, thereby exerting a function of suppressing the resonance of the rotating shaft. In the dynamic vibration absorber 100 according to the present embodiment, with respect to both vibrations in the rotation direction (twisting direction) on the rotating shaft and vibrations in the tilting direction (prying direction) on the rotating shaft with respect to the central axis of the rotating shaft. The vibrating ring 130 and the stopper 140 are designed so as to suppress the resonance of the rotating shaft. However, the dynamic vibration absorber 100 according to this embodiment can also be applied to an application that suppresses the vibration of either one.

As explained in the background technology, in order to suppress the resonance of the propeller shaft as the rotating shaft, it is necessary to take measures against vibration at a relatively low frequency. Therefore, in such a case, it is necessary to use the elastic body 120 having a low spring constant. Therefore, in order to suppress the occurrence of imbalance, the dynamic vibration absorber 100 according to this embodiment is provided with a stopper 140 as described above.

The stopper 140 includes a cylindrical portion 141 fitted in an annular notch 131 provided on the outer peripheral surface of the vibrating ring 130, and a flange-shaped regulating portion 142 extending radially inward from the tip of the cylindrical portion 141. There is. The regulating portion 142 abuts against the film-like portion 122 as a regulated portion provided on the outer peripheral surface side of the sleeve 110, so that the amount of movement of the vibrating ring 130 with respect to the sleeve 110 in the radial direction is regulated. Has been done.

Then, in the regulating portion 142 according to the present embodiment, the one-sided inclined surface 142a and the sleeve are inclined so that the distance from the regulated portion (film-like portion 122) increases toward one end side of the sleeve 110 as an annular member in the axial direction. It is provided with an inclined surface 142b on the other end side in which the distance from the regulated portion increases toward the other end side in the axial direction of 110. As a result, the vibrating ring 130 and the stopper 140 are allowed to move in the tilting direction (pry direction) with respect to the central axis of the rotating shaft with respect to the regulated portion. Here, in the axial direction of the regulating portion 142, the side of the elastic body 120 away from the main body portion 121 corresponds to one end side (right side in FIG. 2), and the side of the elastic body 120 close to the main body portion 121 is the other end side (FIG. 2). It corresponds to (middle, left side).

In a state where no external force is applied to the dynamic vibration absorber 100, a minute amount is formed between the boundary between the one-side inclined surface 142a and the other-side inclined surface 142b and the surface of the film-like portion 122. A gap is formed.

Here, in the present embodiment, the one-side inclined surface 142a is composed of an inclined surface whose diameter increases from the other end side toward one end side, and the other end side inclined surface 142b is from one end side to the other end side. It is composed of an inclined surface whose diameter increases toward the end, and one end side inclined surface 142a and the other end side inclined surface 142b directly intersect with each other. That is, there is no portion that becomes a large cylindrical surface or a portion that is recessed outward in the radial direction between the one end side inclined surface 142a and the other end side inclined surface 142b. However, it is possible to have a slight cylindrical surface so that the direct intersection does not hinder the movement of the vibrating ring 130 and the stopper 140 in the tilting direction (pry direction) at an acute angle. Therefore, the contact portion of the regulating portion 142 with the film-like portion 122 does not become a wide surface contact or is not contacted at two or more places, and is at the intersection of the one-side inclined surface 142a and the other-side inclined surface 142b. It becomes a rough line contact.

More specifically, substantially the entire area of the one-side inclined surface 142a and the substantially entire area of the other-side inclined surface 142b are composed of conical surfaces (so-called tapered surfaces). It should be noted that only a small portion near the intersection of the conical surface forming most of the one-side inclined surface 142a and the conical surface forming most of the other-side inclined surface 142b is a curved surface (so-called R surface). ) May be formed. Even in this case, since a part of the R surface of the one end side inclined surface 142a and a part of the R surface of the other end side inclined surface 142b intersect, the one end side inclined surface 142a and the other end side inclined surface 142b Are still directly intersecting. Further, if there is no problem in terms of manufacturing and quality, the entire area of the one-side inclined surface 142a and the entire area of the other-side inclined surface 142b may be conical surfaces, and these may intersect at an acute angle.

<Advantages of the dynamic vibration absorber according to this embodiment>
According to the dynamic vibration absorber 100 according to the present embodiment, the stopper 140 regulates the amount of movement of the vibration ring 130 with respect to the sleeve 110 in the radial direction, so that the occurrence of imbalance can be suppressed. The vibrating ring 130 and the stopper 140 are allowed to move in the inclination direction (pry direction) with respect to the central axis of the rotation axis with respect to the film-like portion 122 as the regulated portion provided on the outer peripheral surface side of the sleeve 110. Has been done. That is, while the vicinity of the boundary between the one end side inclined surface 142a and the other end side inclined surface 142b slides on the surface of the film-like portion 122, the regulating portion 142 refers to the surface with respect to the central axis of the rotation axis. Can lean against. Therefore, the vibrating ring 130 and the stopper 140 can move with respect to the film-like portion 122 so as to be inclined with respect to the central axis. As a result, the vibration ring 130 can suppress resonance with respect to vibration of the rotating shaft in the tilting direction (prying direction) with respect to the central axis of the rotating shaft. As described above, according to the dynamic vibration absorber 100 according to the present embodiment, while suppressing the occurrence of unbalance, not only the vibration in the rotation direction (twisting direction) on the rotation axis but also the rotation axis with respect to the central axis of the rotation axis. Resonance can also be suppressed for vibration in the tilting direction (prying direction).

Further, since the regulating portion 142 of the stopper 140 collides with the film-like portion 122 made of the elastic material covering the outer peripheral surface of the sleeve 110 to regulate the movement amount of the vibrating ring 130, the collision occurs. It is possible to suppress the noise generated at the time, and it is possible to suppress the sleeve 110 from being scratched.

(Example 2)
FIG. 3 shows Example 2 of the present invention. In this embodiment, the configuration when the shape of the regulation portion in the stopper is different from that in the first embodiment will be described. Since other configurations and operations are the same as those in the first embodiment, the same components are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 3 is a schematic cross-sectional view of the dynamic vibration absorber according to the second embodiment of the present invention. The dynamic vibration absorber 100X according to the present embodiment also includes a sleeve 110, a vibration ring 130, and an elastic body 120, as in the case of the first embodiment. Since these configurations are the same as the configurations shown in the first embodiment, the description thereof will be omitted.

Further, also in the dynamic vibration absorber 100X according to the present embodiment, as in the case of the first embodiment, the metal fixed to the vibrating ring 130 and regulating the amount of movement of the vibrating ring 130 with respect to the sleeve 110 in the radial direction. It is equipped with a stopper 140X made of a material, hard resin, or the like.

Also in the stopper 140X according to the present embodiment, the cylindrical portion 141X fitted in the annular notch 131 provided on the outer peripheral surface of the vibrating ring 130 and the flange-shaped regulation extending radially inward from the tip of the cylindrical portion 141X. It has a unit 142X. The restricting portion 142X abuts on the film-like portion 122 as a regulated portion provided on the outer peripheral surface side of the sleeve 110, so that the amount of movement of the vibrating ring 130 with respect to the sleeve 110 in the radial direction is regulated. Has been done.

Further, also in the regulation portion 142X according to the present embodiment, the one-end side inclined surface 142Xa and the sleeve, in which the distance from the regulated portion (film-like portion 122) increases toward one end side of the sleeve 110 as an annular member in the axial direction, and the sleeve. It is provided with an inclined surface 142Xb on the other end side in which the distance from the regulated portion increases toward the other end side in the axial direction of 110. As a result, the vibrating ring 130 and the stopper 140X are allowed to move in the tilting direction (pry direction) with respect to the central axis of the rotating shaft with respect to the regulated portion.

In a state where no external force is applied to the dynamic vibration absorber 100X, a minute amount is formed between the boundary between the one-side inclined surface 142Xa and the other-side inclined surface 142Xb and the surface of the film-like portion 122. A gap is formed.

Here, also in this embodiment, the one end side inclined surface 142Xa is composed of an inclined surface whose diameter increases from the other end side toward one end side, and the other end side inclined surface 142Xb is from one end side to the other end side. It is composed of an inclined surface whose diameter increases as it goes toward it, and one end side inclined surface 142Xa and the other end side inclined surface 142Xb directly intersect with each other. Therefore, the contact portion of the regulation portion 142X with the film-like portion 122 is a substantially linear contact.

More specifically, in the case of this embodiment, the shape of the inner peripheral surface of the regulating portion 142X in the stopper cross section obtained by cutting the stopper 140X on the surface including the central axis is configured to be an arc shape or an elliptical arc shape. Then, of the inner peripheral surfaces of the regulating portion 142X, one end side constitutes the one end side inclined surface 142Xa from the portion closest to the film-like portion 122, and the other end side from the said portion constitutes the other end side inclined surface 142Xb. ..

In the dynamic vibration absorber 100X according to the present embodiment configured as described above, the same effect as in the case of the first embodiment can be obtained.

(Example 3)
FIG. 4 shows Example 3 of the present invention. In this embodiment, the configuration when the shape of the regulation portion in the stopper is different from that in the first embodiment will be described. Since other configurations and operations are the same as those in the first embodiment, the same components are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 4 is a schematic cross-sectional view of the dynamic vibration absorber according to the third embodiment of the present invention. The dynamic vibration absorber 100Y according to the present embodiment also includes a sleeve 110, a vibration ring 130, and an elastic body 120, as in the case of the first embodiment. Since these configurations are the same as the configurations shown in the first embodiment, the description thereof will be omitted.

Then, in the dynamic vibration absorber 100Y according to the present embodiment, as in the case of the first embodiment, the same applies to the dynamic vibration absorber 100Y.
It is provided with a stopper 140Y fixed to the vibrating ring 130 and made of a metal material, a hard resin, or the like that regulates the amount of movement of the vibrating ring 130 in the radial direction with respect to the sleeve 110.

Also in the stopper 140Y according to the present embodiment, the cylindrical portion 141Y fitted in the annular notch 131 provided on the outer peripheral surface of the vibrating ring 130 and the flange-shaped regulation extending radially inward from the tip of the cylindrical portion 141Y. It has a part 142Y.

Then, in the regulating portion 142Y according to the present embodiment, most of the inner peripheral surface thereof is spaced from the regulated portion (film-like portion 122) toward one end side in the axial direction of the sleeve 110 as an annular member. It is composed of an expanding end-side inclined surface 142Y. More specifically, most of the inner peripheral surface of the regulating portion 142Y is composed of a conical surface whose diameter increases from the other end side (the side close to the main body portion 121 of the elastic body 120) toward one end side. Chamfering is formed only in a small portion of the regulating portion 142Y near the intersection of the end surface facing the main body portion 121 and the conical surface. This chamfered portion corresponds to the other end side inclined surface 142Yb. The chamfered portion may be a curved surface (so-called R surface).

As described above, in the present embodiment, the main body portion 121 of the elastic body 120 is provided from the center of the axial width of the regulation portion 142Y at the intersection of the one end side inclined surface 142Ya and the other end side inclined surface 142Yb. It is arranged in a position that is biased toward the side.

If there is no problem in terms of manufacturing and quality, the entire inner peripheral surface of the regulating portion 142Y is composed of only a conical surface, and the end surface of the regulating portion 142Y facing the main body portion 121 and the conical surface of the regulating portion 142Y are inside. The peripheral surface may intersect at an acute angle. In this case, only one end side inclined surface 142Ya exists, and the other end side inclined surface 142Yb does not exist.

Further, also in the dynamic vibration absorber 100Y according to the present embodiment, when no external force is applied, the vicinity of the boundary between the one end side inclined surface 142Ya and the other end side inclined surface 142Yb and the surface of the film-like portion 122. A minute gap is formed between the two.

Here, also in this embodiment, the one end side inclined surface 142Ya is composed of an inclined surface whose diameter increases from the other end side toward one end side, and the other end side inclined surface 142Yb is from one end side to the other end side. It is composed of an inclined surface whose diameter increases as it goes toward it, and one end side inclined surface 142Ya and the other end side inclined surface 142Yb directly intersect with each other. Therefore, the contact portion of the regulation portion 142Y with the film-like portion 122 is a substantially linear contact. Needless to say, the same applies even when a configuration is adopted in which only the one end side inclined surface 142Ya exists and the other end side inclined surface 142Yb does not exist.

In the dynamic vibration absorber 100Y according to the present embodiment configured as described above, the same effect as in the case of the first embodiment can be obtained. Further, in the present embodiment, the intersecting portion between the one end side inclined surface 142Ya and the other end side inclined surface 142Yb is provided with the main body portion 121 of the elastic body 120 from the center of the axial width of the regulation portion 142Y. It is arranged in a position that is biased to the side. Therefore, the amount of inclination of the vibration ring 130 and the stopper 140Y with respect to the sleeve 110 with respect to the central axis can be more tolerated. Therefore, the degree of freedom in design can be increased. Needless to say, the same applies even when a configuration is adopted in which only the one end side inclined surface 142Ya exists and the other end side inclined surface 142Yb does not exist.

(Example 4)
FIG. 5 shows Example 4 of the present invention. In this embodiment, the configuration when the shape of the regulation portion in the stopper is different from that in the first embodiment will be described. Since other configurations and operations are the same as those in the first embodiment, the same components are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 5 is a schematic cross-sectional view of the dynamic vibration absorber according to the fourth embodiment of the present invention. The dynamic vibration absorber 100YY according to the present embodiment also includes a sleeve 110, a vibration ring 130, and an elastic body 120, as in the case of the first embodiment. Since these configurations are the same as the configurations shown in the first embodiment, the description thereof will be omitted.

Further, also in the dynamic vibration absorber 100YY according to the present embodiment, as in the case of the first embodiment, the metal fixed to the vibration ring 130 and restricting the amount of movement of the vibration ring 130 with respect to the sleeve 110 in the radial direction. It is equipped with a stopper 140YY made of a material, hard resin, or the like.

Also in the stopper 140YY according to the present embodiment, the cylindrical portion 141YY fitted in the annular notch 131 provided on the outer peripheral surface of the vibrating ring 130 and the flange-shaped regulation extending radially inward from the tip of the cylindrical portion 141YY. It has a part 142YY.

Then, in the regulation portion 142YY according to the present embodiment, as in the case of the first embodiment, the one-end side inclined surface in which the distance from the film-like portion 122 increases toward one end side in the axial direction of the sleeve 110 as an annular member. It is provided with 142YYa and an inclined surface 142YYb on the other end side in which the distance from the regulated portion increases toward the other end side in the axial direction of the sleeve 110. Then, in this embodiment, the intersecting portion between the one end side inclined surface 142YYa and the other end side inclined surface 142YYb is the side of the width in the regulation portion 142YY axial direction where the main body portion 121 of the elastic body 120 is provided from the center. It is arranged in a position that is biased toward.

In this embodiment as well, as in the case of the first embodiment, the one end side inclined surface 142YYa and the other end side inclined surface 142YYb directly intersect with each other. Further, as described in the first embodiment, both the one end side inclined surface 142YYa and the other end side inclined surface 142YYb may be formed as conical surfaces (tapered surfaces) so that they directly intersect with each other, or near the intersection. A curved surface (so-called R surface) may be formed only in a small portion.

In the dynamic vibration absorber 100YY according to the present embodiment configured as described above, the same effect as in the case of the third embodiment can be obtained.

(Example 5)
FIG. 6 shows Example 5 of the present invention. In this embodiment, the configuration when the shape of the regulation portion in the stopper is different from that in the first embodiment will be described. Since other configurations and operations are the same as those in the first embodiment, the same components are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 6 is a schematic cross-sectional view of the dynamic vibration absorber according to the fifth embodiment of the present invention. The dynamic vibration absorber 100Z according to the present embodiment also includes a sleeve 110, a vibration ring 130, and an elastic body 120, as in the case of the first embodiment. Since these configurations are the same as the configurations shown in the first embodiment, the description thereof will be omitted.

Further, also in the dynamic vibration absorber 100Z according to the present embodiment, as in the case of the first embodiment, the metal fixed to the vibrating ring 130 and restricting the amount of movement of the vibrating ring 130 with respect to the sleeve 110 in the radial direction. It is equipped with a stopper 140Z made of a material, hard resin, or the like.

In the stopper 140Z according to the present embodiment, the cylindrical portion 141Z fitted in the annular notch 131 provided on the outer peripheral surface of the vibrating ring 130, and the regulating portion 142Z extending radially inward from the tip of the cylindrical portion 141Z. It has.

Then, in the regulation portion 142Z according to the present embodiment, unlike the case of each of the above embodiments, the distance from the film-like portion 122 is increased toward one end side in the axial direction of the sleeve 110 as the annular member by the bending process. A portion having an inclined surface 142Za on one end side that expands and a portion having an inclined surface 142Zb on the other end side that expands the distance between the sleeve 110 and the regulated portion toward the other end side in the axial direction are provided. Further, also in this embodiment, as in the case of the fourth embodiment, the intersecting portion between the one end side inclined surface 142Za and the other end side inclined surface 142Zb is an elastic body from the center of the axial width of the regulating portion 142Z. It is arranged at a position biased toward the side where the main body portion 121 of the 120 is provided.

In this embodiment as well, as in the case of the first embodiment, the one end side inclined surface 142Za and the other end side inclined surface 142Zb directly intersect with each other. Further, as described in the first embodiment, both the one end side inclined surface 142Za and the other end side inclined surface 142Zb may be formed as conical surfaces (tapered surfaces) so that they directly intersect with each other, or near the intersection. A curved surface (so-called R surface) may be formed only in a small portion.

In the dynamic vibration absorber 100Z according to the present embodiment configured as described above, the same effect as in the cases of the above-mentioned Examples 3 and 4 can be obtained.

100, 100X, 100Y, 100YY, 100Z Dynamic Vibration Absorber 110 Hub 120 Elastic body 121 Main body part 122 Membrane part 130 Vibration ring 131 Notch 140, 140X, 140Y, 140YY, 140Z Stopper 141, 141X, 141Y Cylindrical part 142, 142X , 142Y, 142YY, 142Z Restriction part 142a, 142Xa, 142Ya, 142YYa, 142Za One end side inclined surface 142b, 142Xb, 142Yb, 142YYb, 142Zb The other end side inclined surface

Claims (5)

An annular member attached to the rotating shaft, a vibration ring provided concentrically with the annular member on the outer peripheral surface side of the annular member, an annular elastic body connecting the annular member and the vibration ring, and the vibration. A dynamic vibration absorber that is fixed to a ring and includes a stopper that regulates the amount of movement of the vibrating ring in the radial direction with respect to the annular member.
The stopper has a regulating portion that regulates the amount of movement of the vibrating ring with respect to the annular member in the radial direction by abutting against the regulated portion on the outer peripheral surface side of the annular member.
The regulated portion has an inclined surface on one end side in which the distance from the regulated portion increases as the regulated portion moves toward one end side in the axial direction of the annular member, and the regulated portion increases toward the other end side in the axial direction of the annular member. By providing the inclined surface of at least one of the inclined surfaces on the other end side in which the interval between the two is widened, the vibration ring and the stopper are inclined in the direction of inclination with respect to the central axis of the rotating shaft with respect to the regulated portion. A dynamic vibration absorber characterized in that the movement of the vibration absorber is allowed. On the outer peripheral surface side of the annular member, a film-like portion composed of a part of the elastic body is provided over the entire circumference.
The dynamic vibration absorber according to claim 1, wherein the regulated portion is composed of the film-like portion. The one end side inclined surface is composed of an inclined surface whose diameter increases from the other end side toward one end side, and the other end side inclined surface is an inclined surface whose diameter increases from the one end side toward the other end side. The dynamic vibration absorber according to claim 1 or 2, wherein the one end side inclined surface and the other end side inclined surface are directly intersecting with each other. The dynamic vibration absorber according to claim 3, wherein the shape of the inner peripheral side of the regulation portion in the cross section of the stopper is an arc shape or an elliptical arc shape. The intersection of the one end side inclined surface and the other end side inclined surface is arranged at a position biased from the center to the side where the main body portion of the elastic body is provided in the axial width of the restricting portion. The dynamic vibration absorber according to any one of claims 1 to 3.

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