JP2021173345A - Torsional damper with flexible damper - Google Patents

Abstract

To provide a torsional damper with a flexible damper related to a vibration control technology of a rotation drive system.SOLUTION: A torsional damper with a flexible damper comprises: a hub 11 having a boss part 12, a stay part 13 and a rim part 14; a torsional damper part 21 in which a damper mass 23 is connected to the outer peripheral side of the rim part 14 via a damper rubber 22; and a bending damper part 31 in which a bending damper mass 34 is connected via a mounting member 32 and a bending damper rubber 33 on the outer peripheral side of the hub 11. Between an outer peripheral surface 11a of the hub 11 and an inner peripheral surface 34a of the bending damper mass 34, an annular radial stopper member 50 that regulates a radial displacement of the bending damper mass 34 is disposed.SELECTED DRAWING: Figure 1

Description

The present invention relates to a torsional damper with a bending damper according to a vibration isolation technique for a rotary drive system.

Conventionally, a torsional damper 100 as shown in FIG. 3 is known (see, for example, Patent Documents 1 and 2). Here, FIG. 3 is a cross-sectional view of a conventional torsional damper with a bending damper. The torsional damper 100 shown in FIG. 3 is a torsional damper 100 with a bending damper including a hub 111, a torsional damper portion 121, and a bending damper portion 131. The hub 111 has a boss portion 112, a stay portion 113, and a rim portion 114. The hub 111 is configured to be attached to the end of the shaft 171 by a pulley bolt that is inserted into the boss portion 112. The torsional damper portion 121 is formed by connecting the damper mass 123 to the outer peripheral side of the rim portion 114 via a damper rubber 122. The bending damper portion 131 is formed by connecting the bending damper mass 134 via the plate 132 and the bending damper rubber 133.

In the torsional damper 100 as shown in FIG. 3, the bending damper mass 134 of the bending damper portion 131 is supported by the bending damper rubber 133, and the bending damper rubber 133 and the plate 132 are adhered to each other. The rotation axis and the center of gravity axis of the bent damper mass 134 may deviate from each other due to manufacturing reasons. Hereinafter, in a state where the rotation axis and the center of gravity axis are displaced, the direction of deviation from the rotation axis toward the center of gravity axis may be referred to as a "center of gravity deviation direction". As described above, when the rotation axis and the center of gravity axis of the bending damper mass 134 are deviated from each other, centrifugal force is generated in the direction of deviating the center of gravity due to the rotation of the bending damper mass 134.

Since the bending damper mass 134 of the torsional damper 100 as shown in FIG. 3 is supported only by the bending damper rubber 133, when a centrifugal force is applied to the bending damper mass 134, the bending damper rubber 133 is displaced in the direction of the center of gravity shift, and the initial stage The displacement of the center of gravity axis is worse than the displacement of the center of gravity axis of. If the deviation of the center of gravity axis is further deteriorated, the centrifugal force in the direction of the deviation of the center of gravity is further increased, the deviation of the center of gravity axis is further deteriorated, and finally the bending damper portion 131 may be damaged.

Therefore, in the conventional torsional damper 100 as shown in FIG. 3, a resin stopper 150 is provided on the outer peripheral portion of the bending damper mass 134 to regulate the movement of the bending damper mass 134 in the radial direction, thereby causing a large deformation of the bending damper portion 131. It is suppressing. Further, by providing the resin stopper 150 as described above, it is possible to suppress abnormal noise due to contact between the bending damper mass 134 and the inner peripheral surface of the hub 111, and to suppress wear of the bending damper mass 134. ing.

Japanese Unexamined Patent Publication No. 2019-19976 Japanese Unexamined Patent Publication No. 2019-108911

However, the conventional torsional damper 100 as shown in FIG. 3 requires a cap member 151 in order to prevent the resin stopper 150 from falling off. The cap member 151 is a member that functions as a stopper that prevents the resin stopper 150 from falling off. Therefore, the conventional torsional damper 100 has a problem that the number of parts increases and the manufacturing cost increases. Further, in the conventional torsional damper 100, since the bending damper portion 131 is installed on the inner peripheral portion of the hub 111, the design space is narrow and it is difficult to set a sufficient mass Ip, so that the bending vibration reduction effect is sufficient. There was also the problem of not being able to demonstrate it.

In view of the above problems, according to the present invention, a torsional damper with a bending damper having an excellent effect of reducing bending vibration is provided.

In order to solve the above-mentioned problems, the present invention provides the following torsional damper with a bending damper.

[1] A hub having a boss portion, a stay portion and a rim portion, a torsional damper portion in which a damper mass is connected to the outer peripheral side of the rim portion via a damper rubber, and a mounting member and a bent damper rubber on the outer peripheral side of the hub. It is equipped with a bending damper part that connects the bending damper masses.
A torsional damper with a bending damper in which an annular radial stopper member that regulates a radial displacement amount of the bending damper mass is disposed between an outer peripheral surface of the hub and an inner peripheral surface of the bending damper mass.

[2] The torsional damper with a bending damper according to the above [1], wherein the radial stopper member is an annular member made of resin.

[3] The radial stopper member is arranged so as to be separated from the inner peripheral surface side of the bending damper mass in the normal rotation region, and when the bending damper mass is displaced in the radial direction with respect to the hub, the bending damper mass The torsional damper with a bending damper according to the above [1] or [2], which comes into contact with the inner peripheral surface side.

The torsional damper with a bending damper of the present invention has a remarkable effect of being excellent in a bending vibration reducing effect while suppressing an increase in the number of parts as compared with a conventional torsional damper with a bending damper. That is, by providing the radial stopper member as described above between the outer peripheral surface of the hub and the inner peripheral surface of the bending damper mass, a bending damper portion mounting member (for example, for example) that fixes the bending damper rubber by vulcanization adhesion or the like. The sleeve) has a function of preventing the radial stopper member from falling off. Therefore, a stopper such as a cap member for preventing the resin stopper from falling off is not required separately, and an increase in the number of parts can be effectively suppressed, and for example, a reduction in manufacturing cost can be realized.

Further, when a bending damper portion is provided on the inner peripheral portion of the hub as in the conventional torsional damper with a bending damper, it is necessary to consider the service tap and the center bolt. For this reason, there are many restrictions on the arrangement of the bent damper mass, and the shape of the bent damper mass becomes complicated. On the other hand, by providing the bending damper portion on the outer peripheral side of the hub, restrictions on the arrangement of the bending damper mass are greatly reduced, the shape of the bending damper mass is simplified, and the mass Ip (Inertial mass) can be secured. Become. Therefore, the manufacturing cost can be further reduced.

Further, the torsional damper with a bending damper configured as described above can easily secure Ip (inertial mass) and can shorten the axial length, so that the prying deformation can be reduced. In addition, since foreign matter is unlikely to accumulate in the bending damper portion, it is also excellent in dust resistance against foreign matter.

It is sectional drawing of the torsional damper with a bending damper of 1st Embodiment. It is sectional drawing of the torsional damper with a bending damper of 2nd Embodiment. It is sectional drawing of the conventional torsional damper with a bending damper.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the present invention is not limited to the following embodiments, and it is understood that design changes, improvements, etc. may be appropriately made based on the ordinary knowledge of those skilled in the art without departing from the spirit of the present invention. It should be.

(1) Tortional damper with bending damper (first embodiment)
The torsional damper with a bending damper of the first embodiment is a torsional damper 1 with a bending damper as shown in FIG. FIG. 1 is a cross-sectional view of a torsional damper with a bending damper according to the first embodiment.

The torsional damper 1 with a bending damper shown in FIG. 1 is a torsional damper 1 including a hub 11, a torsional damper portion 21, and a bending damper portion 31. Hereinafter, the torsional damper 1 with a bending damper shown in FIG. 1 is also simply referred to as “tortional damper 1”.

The hub 11 has a boss portion 12, a stay portion 13, and a rim portion 14, and is an annular member in which these are integrally formed. The hub 11 is attached to the end of a shaft (not shown) such as a vehicle crankshaft by, for example, a pulley bolt (not shown) inserted into the inner circumference of the boss portion 12.

The torsional damper portion 21 has a damper rubber 22 and a damper mass 23, and the damper mass 23 is connected to the outer peripheral side of the rim portion 14 via the damper rubber 22. The torsional damper unit 21 is for absorbing the torsional vibration (vibration in the circumferential direction) generated in the rotary drive system by resonance operation.

For example, as the torsional damper portion 21, a rubber fitting type torsional damper portion 21 in which a damper rubber 22 is press-fitted and fitted between the rim portion 14 and the damper mass 23 from one side in the axial direction can be mentioned. Further, for example, as in the torsional damper 1A shown in FIG. 2, a bush type torsional damper portion 21 in which the damper rubber 22 is vulcanized and adhered between the sleeve and the damper mass 23 and the sleeve is fitted to the rim portion 14. May be good. Here, FIG. 2 is a cross-sectional view of the torsional damper with a bending damper of the second embodiment. A pulley groove 24 for winding an endless belt (not shown) related to torque transmission is provided on the outer peripheral surfaces of the torsional damper 1 shown in FIG. 1 and the damper mass 23 of the torsional damper 1A shown in FIG. There is.

The bending damper portion 31 has a mounting member 32, a bending damper rubber 33, and a bending damper mass 34, and is for absorbing bending vibration (vibration in the radial direction) generated in the rotary drive system by resonance operation.

In the torsional damper 1 shown in FIG. 1, a bending damper portion 31 is provided on the outer peripheral side of the hub 11. That is, in the bending damper portion 31, the bending damper mass 34 is connected to the hub 11 via the mounting member 32 and the bending damper rubber 33 on the outer peripheral side of the hub 11. For example, as the bending damper portion 31, the mounting member 32, the bending damper rubber 33, and the bending damper mass 34 are arranged in the axial direction, and the bending damper rubber 33 is vulcanized and bonded between the mounting member 32 and the bending damper mass 34. can. On the outer peripheral side of the hub 11, there is no particular limitation on the location where the bending damper portion 31 is arranged, and for example, the bending vibration generated in the rotary drive system can be appropriately provided at a location where it can be absorbed by resonance operation.

The torsional damper 1 shown in FIG. 1 has an annular radial stopper member 50 that regulates a radial displacement amount of the bending damper mass 34 between the outer peripheral surface 11a of the hub 11 and the inner peripheral surface 34a of the bending damper mass 34. It is arranged.

According to the torsional damper 1 having the above configuration, the following effects are exhibited.

The torsional damper 1 shown in FIG. 1 has a remarkable effect of being excellent in bending vibration reduction effect while suppressing an increase in the number of parts as compared with the conventional torsional damper 100 with a bending damper as shown in FIG. .. More specifically, as shown in FIG. 1, the bending damper rubber 33 is vulcanized and bonded by providing the radial stopper member 50 between the outer peripheral surface 11a of the hub 11 and the inner peripheral surface 34a of the bending damper mass 34. The mounting member 32 (for example, the sleeve) fixed by the radial stopper member 50 has a function of preventing the stopper member 50 from falling off. Therefore, a stopper such as a cap member 151 (see FIG. 3) for preventing the resin stopper 150 (see FIG. 3) from falling off is not required separately, and an increase in the number of parts can be effectively suppressed, for example. It is possible to reduce the manufacturing cost.

Further, when the bending damper portion 131 is provided on the inner peripheral portion of the hub 111 as in the conventional torsional damper 100 with a bending damper as shown in FIG. 3, it is necessary to consider the service tap and the center bolt. Become. Therefore, there are many restrictions on the arrangement of the bending damper mass 134, and the shape of the bending damper mass 134 may be complicated. On the other hand, in the torsional damper 1 shown in FIG. 1, by providing the bending damper portion 31 on the outer peripheral side of the hub 11, restrictions on the arrangement of the bending damper mass 34 are significantly reduced, and the shape of the bending damper mass 34 is simplified. It is possible to secure the mass Ip (inertial mass). Therefore, it is possible to further reduce the manufacturing cost.

Further, the torsional damper 1 shown in FIG. 1 can easily secure Ip (inertial mass) and can shorten the axial length, so that the prying deformation can be reduced. Further, since foreign matter is unlikely to accumulate in the bending damper portion 31, it is also excellent in dust resistance against foreign matter.

The torsional damper 1 shown in FIG. 1 absorbs the torsional vibration generated in the rotary drive system by the resonance operation of the torsional damper section 21, and also absorbs the bending vibration generated in the rotary drive system by the bending damper section 31. Since it is absorbed by resonance operation, it is possible to absorb and reduce two types of vibration with one damper device.

When the bending damper mass 34 is displaced in the radial direction during operation, the radial stopper member 50 abuts on the inner peripheral surface 34a side of the bending damper mass 34 to regulate the radial displacement amount to a certain amount. It is a member of. By providing such a radial stopper member 50, it is possible to suppress the generation of a large abnormal noise (metal collision noise) at the time of contact with the bending damper mass 34.

The radial stopper member 50 may be arranged between the outer peripheral surface 11a of the hub 11 and the inner peripheral surface 34a of the bending damper mass 34. For example, the radial stopper member 50 is located on the outer peripheral surface 11a side of the hub 11. It is preferable that it is attached. The radial stopper member 50 is arranged between the outer peripheral surface 11a of the hub 11 and the inner peripheral surface 34a of the bending damper mass 34 so as to be separated from the inner peripheral surface 34a side of the bending damper mass 34 in the normal rotation region. Is preferable. With this configuration, when the bending damper mass 34 is displaced in the radial direction with respect to the hub 11, and the radial stopper member 50 comes into contact with the inner peripheral surface 34a side of the bending damper mass 34, the friction between the contact surfaces of both surfaces is frictional. Due to the damping, the vibration of the bending damper mass 34 can be effectively reduced, and the excessive load on the bending damper rubber 33 can be reduced. As a result, the durability of the bending damper rubber 33 can be expected to be improved.

The radial stopper member 50 is preferably formed in an annular shape by a material such as a resin having excellent sliding characteristics and abrasion resistance. For example, by extrapolating an annular radial stopper member 50 made of resin to the outer peripheral portion of the hub 11, it can be attached to the outer peripheral surface 11a side of the hub 11.

The radial stopper member 50 is preferably arranged so as to abut on a part of the mounting member 32 of the bending damper portion 31 at one end in the axial direction. With this configuration, the mounting member 32 of the bending damper portion 31 can extremely effectively suppress the radial stopper member 50 from falling off or being displaced in the axial direction.

The above is the description of this embodiment. Although the present embodiment describes a torsional damper attached to the end of a shaft such as a crankshaft for a vehicle, the torsional damper of the present embodiment is not limited to this. The torsional damper of the present embodiment is, for example, a torsional damper for reducing torsional vibration not only in crankshafts of automobiles, construction machines, ships, etc., but also in camshafts of engines and various rotating shafts of other devices. Can be applied to.

The torsional damper with a bending damper of the present invention is used, for example, for vibration-proofing and supporting an automobile auxiliary machine, a control device, an electronic device, and the like. Further, the torsional damper with a bending damper of the present invention is used, for example, in the fields of home appliances and electronic devices.

1: Tortional damper (tortional damper with bending damper)
1A: Tortional damper (tortional damper with bending damper)
11: Hub 11a: Outer peripheral surface 12: Boss part 13: Stay part 14: Rim part 21: Tortional damper part 22: Damper rubber 23: Damper mass 24: Pulley groove 31: Bending damper part 32: Mounting member 33: Bending damper rubber 34: Bending damper mass 34a: Inner peripheral surface 50: Radial stopper member

Claims (3)

A hub having a boss portion, a stay portion and a rim portion, a torsional damper portion in which a damper mass is connected to the outer peripheral side of the rim portion via a damper rubber, and a bent damper mass on the outer peripheral side of the hub via a mounting member and a bent damper rubber. With a bending damper part that connects the
A torsional damper with a bending damper in which an annular radial stopper member that regulates a radial displacement amount of the bending damper mass is disposed between an outer peripheral surface of the hub and an inner peripheral surface of the bending damper mass. The torsional damper with a bending damper according to claim 1, wherein the radial stopper member is an annular member made of resin. The radial stopper member is arranged so as to be separated from the inner peripheral surface side of the bent damper mass in the normal rotation region, and when the bent damper mass is displaced in the radial direction with respect to the hub, the inner peripheral surface of the bent damper mass is provided. The torsional damper with a bending damper according to claim 1 or 2, which abuts on the side.

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