JP5812529B2 - Vibration control device - Google Patents

Description

  The present invention relates to a vibration damping device that suppresses vibration of a building during an earthquake and vibration of a traveling vehicle.

  Conventionally, a vibration damping device electrically measures (detects) disturbance input such as vibration of a building at the time of an earthquake or vibration of a moving car body by a sensor, and uses the detected data as an electronic device such as a computer or an electric arithmetic circuit. Control is performed by a control device, and control is performed by giving a target signal to a vibration suppression drive device such as an actuator (for example, see Patent Document 1).

JP 2011-26923 A

  However, in the above-described vibration damping device, the measurement and calculation processing is a minute electric signal processing using electronic control components, and is complicated and precise. In this case, the entire vibration damping device cannot perform a desired function.

  For example, even when an active vibration control device is constructed, if a vibration occurs in the vibration control device, the vibration control device may run out of control and damage the building or the like.

For this reason, most active vibration control devices are used with the specification of purely mechanical driven vibration (passive) turned off.

  In other words, although the ideal one is theoretically feasible, practically, most of them are used in passive (passive) control although the effect is reduced to give priority to safety. ing.

  The present invention has been made in view of the above-described circumstances, and does not use electronic components such as sensors and electronic control devices. Therefore, the vibration of a building at the time of an earthquake with a mechanical configuration with a low risk of failure. Another object of the present invention is to provide a vibration damping device that can suppress vibrations of a vehicle body during traveling.

According to a first aspect of the present invention, in a vibration damping device that suppresses vibration of a first inertial body that vibrates alternately in one direction and the other direction by transmission of vibration from a vibration source, a hydraulic pressure source that generates hydraulic pressure, and a valve body And a first oil passage and a second oil passage corresponding to vibrations in the one direction and the other direction of the first inertial body, with the oil pressure moved relative to the valve body and supplied from the oil pressure source. A switching device having a spool for switching and outputting, a base portion connected to one of the first inertial body and the vibration source, the one direction and the other direction with respect to the base portion And an actuator having a second inertial body movable to the cylinder, wherein the actuator is connected to one of the first inertial body and the second inertial body, and is connected to the other to the cylinder. The piston moving in the cylinder The cylinder has a first oil chamber connected to the first oil passage on one side of the piston and a second oil chamber connected to the second oil passage on the other side. The second inertial body is biased in the one direction by the hydraulic pressure supplied from the first oil passage to the first oil chamber, and the reaction in the other direction acts on the first inertial body, By the hydraulic pressure supplied from the second oil passage to the second oil chamber, the second inertial body is urged in the other direction to cause the one-direction reaction to act on the first inertial body, and the switching device is , Having a third inertia body in which vibration of the vibration source is not transmitted or hardly transmitted, the valve body is configured integrally with the third inertia body, and the spool is configured integrally with the vibration source It is characterized by being.

According to a second aspect of the present invention, in a vibration damping device that suppresses vibration of a first inertial body that vibrates alternately in one direction and the other direction by transmission of vibration from a vibration source, a hydraulic pressure source that generates hydraulic pressure, and a valve body And a first oil passage and a second oil passage corresponding to vibrations in the one direction and the other direction of the first inertial body, with the oil pressure moved relative to the valve body and supplied from the oil pressure source. A switching device having a spool for switching and outputting, a base portion connected to one of the first inertial body and the vibration source, the one direction and the other direction with respect to the base portion And an actuator having a second inertial body movable to the cylinder, wherein the actuator is connected to one of the first inertial body and the second inertial body, and is connected to the other to the cylinder. The piston moving in the cylinder The cylinder has a first oil chamber connected to the first oil passage on one side of the piston and a second oil chamber connected to the second oil passage on the other side. The second inertial body is biased in the one direction by the hydraulic pressure supplied from the first oil passage to the first oil chamber, and the reaction in the other direction acts on the first inertial body, By the hydraulic pressure supplied from the second oil passage to the second oil chamber, the second inertial body is urged in the other direction to cause the one-direction reaction to act on the first inertial body, and the switching device is And a link mechanism coupled to the vibration source and the spool to move the spool relative to the valve body.

According to a third aspect of the present invention, in a vibration damping device that suppresses vibration of a first inertial body that vibrates alternately in one direction and the other direction by transmission of vibration from a vibration source, a hydraulic pressure source that generates hydraulic pressure, and a valve body And a first oil passage and a second oil passage corresponding to vibrations in the one direction and the other direction of the first inertial body, with the oil pressure moved relative to the valve body and supplied from the oil pressure source. A switching device having a spool for switching and outputting, a base portion connected to one of the first inertial body and the vibration source, the one direction and the other direction with respect to the base portion An actuator having a second inertial body movable to the cylinder, wherein the actuator is connected to the first inertial body, and a piston is connected to the second inertial body and moves in the cylinder. And the cylinder is The first oil chamber has a first oil chamber connected to the first oil passage on one side across the piston, and has a second oil chamber connected to the second oil passage on the other side. The second inertial body is urged in the one direction by the hydraulic pressure supplied from the path to the first oil chamber to cause the reaction in the other direction to act on the first inertial body. Due to the hydraulic pressure supplied to the second oil chamber, the second inertial body is urged in the other direction to cause the unidirectional reaction to act on the first inertial body. It is configured separately, and is biased in the same direction as the piston by the movement of the piston.

According to the first aspect of the present invention, the hydraulic pressure generated from the hydraulic pressure source is switched to the first oil path and the second oil path by the switching device and output, so that the second independent of the first inertial body. The inertial body can be urged in the same direction as the vibration direction (one direction and the other direction) of the first inertial body, and as a reaction, the first inertial body can have a reaction opposite to the vibration direction. The vibration of the first inertial body can be suppressed. That is, the first inertial body can be vibrated with a mechanical configuration without using an electrical sensor for detecting the vibration of the first inertial body or an electronic control component for controlling vibration suppression based on the output of the sensor. Can be suppressed.
The actuator has a second inertial body, a cylinder, and a piston. The cylinder is connected to one of the first inertial body and the second inertial body, and the piston is connected to the other. Due to the relative movement of the piston, the second inertial body can be moved relative to the first inertial body, whereby a reaction opposite to the vibration direction can be applied to the first inertial body. That is, vibration of the first inertial body can be suppressed by a simple and reliable mechanical configuration using a cylinder and a piston.
The switching device can switch between the first oil passage and the second oil passage by the valve body and the spool. Further, the actuator moves the piston relative to the cylinder by the hydraulic pressure supplied to the first oil chamber via the first oil passage to move the second inertia body relative to the first inertia body, thereby The reaction from the second inertial body can suppress the vibration in one direction of the first inertial body. Similarly, the actuator moves the piston relative to the cylinder by the hydraulic pressure supplied to the second oil chamber via the second oil passage, and moves the second inertia body relative to the first inertia body. Thus, vibration in the other direction of the first inertial body can be suppressed by the reaction from the second inertial body.
Further, the switching device includes a valve body (valve body) integrally formed with a third inertia body in which vibration of the vibration source is not transmitted or is not easily transmitted, that is, inertia is relatively large and difficult to move, a vibration source, Since it has a spool that is configured integrally and to which the vibration of the vibration source is directly transmitted, the vibration of the vibration source is taken out as a relative movement of the spool with respect to the valve body, and thereby the first oil passage and The second oil passage can be switched.

According to the second aspect of the present invention, the hydraulic pressure generated from the hydraulic pressure source is switched to the first oil path and the second oil path by the switching device and output, so that the second independent of the first inertial body. The inertial body can be urged in the same direction as the vibration direction (one direction and the other direction) of the first inertial body, and as a reaction, the first inertial body can have a reaction opposite to the vibration direction. The vibration of the first inertial body can be suppressed. That is, the first inertial body can be vibrated with a mechanical configuration without using an electrical sensor for detecting the vibration of the first inertial body or an electronic control component for controlling vibration suppression based on the output of the sensor. Can be suppressed.
The actuator has a second inertial body, a cylinder, and a piston. The cylinder is connected to one of the first inertial body and the second inertial body, and the piston is connected to the other. Due to the relative movement of the piston, the second inertial body can be moved relative to the first inertial body, whereby a reaction opposite to the vibration direction can be applied to the first inertial body. That is, vibration of the first inertial body can be suppressed by a simple and reliable mechanical configuration using a cylinder and a piston.
The switching device can switch between the first oil passage and the second oil passage by the valve body and the spool. Further, the actuator moves the piston relative to the cylinder by the hydraulic pressure supplied to the first oil chamber via the first oil passage to move the second inertia body relative to the first inertia body, thereby The reaction from the second inertial body can suppress the vibration in one direction of the first inertial body. Similarly, the actuator moves the piston relative to the cylinder by the hydraulic pressure supplied to the second oil chamber via the second oil passage, and moves the second inertia body relative to the first inertia body. Thus, vibration in the other direction of the first inertial body can be suppressed by the reaction from the second inertial body.
Further, the link mechanism amplifies the vibration of the vibration source and transmits it to the spool, and moves the spool relative to the valve body, thereby switching between the first oil path and the second oil path.

According to the third aspect of the present invention, the hydraulic pressure generated from the hydraulic pressure source is switched to the first oil path and the second oil path by the switching device and output, so that the second independent of the first inertial body. The inertial body can be urged in the same direction as the vibration direction (one direction and the other direction) of the first inertial body, and as a reaction, the first inertial body can have a reaction opposite to the vibration direction. The vibration of the first inertial body can be suppressed. That is, the first inertial body can be vibrated with a mechanical configuration without using an electrical sensor for detecting the vibration of the first inertial body or an electronic control component for controlling vibration suppression based on the output of the sensor. Can be suppressed.
The actuator has a second inertial body, a cylinder, and a piston. The cylinder is connected to one of the first inertial body and the second inertial body, and the piston is connected to the other. Due to the relative movement of the piston, the second inertial body can be moved relative to the first inertial body, whereby a reaction opposite to the vibration direction can be applied to the first inertial body. That is, vibration of the first inertial body can be suppressed by a simple and reliable mechanical configuration using a cylinder and a piston.
The switching device can switch between the first oil passage and the second oil passage by the valve body and the spool. Further, the actuator moves the piston relative to the cylinder by the hydraulic pressure supplied to the first oil chamber via the first oil passage to move the second inertia body relative to the first inertia body, thereby The reaction from the second inertial body can suppress the vibration in one direction of the first inertial body. Similarly, the actuator moves the piston relative to the cylinder by the hydraulic pressure supplied to the second oil chamber via the second oil passage, and moves the second inertia body relative to the first inertia body. Thus, vibration in the other direction of the first inertial body can be suppressed by the reaction from the second inertial body.
Furthermore, the relative movement of the piston relative to the cylinder causes the second inertial body connected to the piston to move relative to the first inertial body, thereby causing the first inertial body to react in a direction opposite to its vibration direction. be able to.

It is a schematic diagram explaining the vibration damping device 1 of the first embodiment.

It is a schematic diagram explaining the vibration damping device 2 of the second embodiment.

It is a schematic diagram explaining the damping device 2A which is the modification 1 of the damping device 2 of Embodiment 2. FIG.

It is a schematic diagram explaining the damping device 2B which is the modification 2 of the damping device 2 of Embodiment 2. FIG.

It is a schematic diagram explaining the vibration damping device 3 of the third embodiment.

FIG. 10 is a schematic diagram illustrating a vibration damping device 3A that is a modification of the vibration damping device 3 of the third embodiment.

Hereinafter, embodiments to which the present invention is applied will be described in detail with reference to the drawings. In addition, in each drawing, the member etc. which attached | subjected the same code | symbol are the things of the same or similar structure, The duplication description about these shall be abbreviate | omitted suitably. Moreover, in each drawing, members and the like that are not necessary for the description are omitted as appropriate.
<Embodiment 1>

  A vibration damping device 1 according to a first embodiment to which the present invention is applied will be described with reference to FIG. In addition, the figure is a figure which illustrates typically the structure and operation | movement of the damping device 1 of Embodiment 1. FIG.

  As shown in FIG. 1, the vibration damping device 1 is interposed between a vibration source A and a first inertial body M1 (for example, a building), and includes a hydraulic pressure source 30, a switching device 10, and an actuator 20. Configured.

  A spring K1 and a damper C1 are interposed between the vibration source A and the first inertia body M1. When the vibration source A vibrates rightward (one direction: positive direction) and leftward (other direction: negative direction) in FIG. 1, the vibration is transmitted to the first inertial body M1 via the spring K1 and the damper C1. Communicated. Corresponding to the displacement z of the vibration source A, a force F acts on the first inertial body M1 via the spring K1 and the damper C1, and as a result, the displacement of the first inertial body M1 becomes x1.

  The hydraulic pressure source 30 includes a tank 32 that stores hydraulic oil, and a pump 31 that supplies the hydraulic oil stored in the tank 32 to the switching device 10.

  The switching device 10 has a valve body (valve body) 12 and a spool 11. The valve body 12 is formed in a cylindrical shape, and is provided with ports a, b, c, d, and e through which hydraulic pressure enters and exits. The valve body 12 is configured integrally with a third inertial body M3 (the second inertial body M2 will be described later). The third inertial body M3 is connected to the first inertial body M1 via the spring K3 and the damper C3 (the spring K2 and the damper C2 will be described later), so that the vibration as a whole is not transmitted or is hardly transmitted, that is, inertia. The structure is moderately strong and difficult to move.

  Here, in principle, the phrase “hard to move” is sufficient if it is difficult to move compared to a spool 11 described later. The spool 11 has a plurality of land portions 14 and a spool shaft 13, and the spool shaft 13 is directly connected to the vibration source A. In the present embodiment, the vibration of the vibration source A is directly transmitted to the spool 11 with respect to the valve body 12 that is configured integrally with the third inertial body M3 and does not move easily. As a result, when the vibration source A vibrates, the spool 11 moves relative to the valve body 12 in the same direction as this vibration. The third inertial body M3 is ideally configured not to move due to the vibration even when the vibration source A vibrates.

  The actuator 20 has a cylinder 22 and a piston 21. The cylinder 22 is formed in a cylindrical shape and has a port f and a port g. The cylinder 22 forms a base portion B together with the mounting member 51, and is connected to the first inertia body M <b> 1 via the mounting member 51. The piston 21 is configured integrally with a second inertial body M2 that hardly moves like the above-described third inertial body M3. The second inertia body M2 is coupled to the vibration source A via the spring K2 and the damper C2. When the displacement of the vibration source A becomes z, the second inertia body M2 and the piston 21 are displaced by x2 via the spring K2 and the damper. The inside of the cylinder 22 is partitioned by the piston 21 into a first oil chamber R1 having a port f and a second oil chamber R2 having a port g.

  A plurality of oil passages are provided between the hydraulic pressure source 30 and the switching device 10 described above and between the switching device 10 and the actuator 20. An oil passage p1 extends from the pump 31 of the hydraulic power source 30 and is connected to the port b of the valve body 12 of the switching device 10. An oil passage (first oil passage) p <b> 2 extends from the port e of the cylinder 12 and is connected to the port f of the cylinder 22. An oil passage (second oil passage) p <b> 3 extends from the port d of the valve body 12 and is connected to the port g of the cylinder 22. An oil passage p5 extends from the port a of the valve body 12, and an oil passage p4 extends from the port c. The oil passages p5 and p4 merge to form an oil passage p6, which is a tank of the hydraulic power source 30. 32.

 The vibration damping device 1 configured as described above operates as follows.

  When the vibration source A moves in one direction (rightward in FIG. 1), the spool 11 moves relative to the valve body 12 of the switching device 10 via the spool shaft 13 to the right, and the first inertial body. M1 moves in one direction via the spring K1 and the damper C1. By relative movement of the spool 11 in one direction, the port c is closed, the remaining ports a, b, d, e are opened, the ports b, e are communicated, and the ports a, d are communicated. As a result, the hydraulic pressure generated by the pump 31 of the hydraulic power source 30 is supplied to the first oil chamber R1 via the oil passage p1, the ports b and e, the oil passage p2, and the port f of the cylinder 22 of the actuator 20. . The hydraulic pressure in the second oil chamber R2 is discharged to the tank 32 through the port g, the oil passage p3, the ports d and a, and the oil passages p5 and p6. By supplying the hydraulic pressure to the first oil chamber R1 and discharging the hydraulic pressure from the second oil chamber R2, the second inertia body M2 integrated with the piston 21 is urged in one direction with respect to the cylinder 22. . Then, due to the reaction force (reaction), the first inertial body M1 is urged through the cylinder 22 and the attachment member 51 in the other direction, that is, the direction opposite to the one direction that is the vibration direction of the vibration source A. As a result, vibration is suppressed.

  When the vibration source A moves in the other direction (left side in FIG. 1), the spool 11 moves relative to the valve body 12 of the switching device 10 in the other direction via the spool shaft 13, and the first The inertia body M1 moves in the other direction via the spring K1 and the damper C1. By the relative movement of the spool 11 in the other direction, the port a is closed, the remaining ports b, c, d, e are opened, the ports b, d are communicated, and the ports c, e are communicated. As a result, the hydraulic pressure generated by the pump 31 of the hydraulic power source 30 is supplied to the second oil chamber R2 via the oil passage p1, the ports b and d, the oil passage p3, and the port g of the cylinder 22 of the actuator 20. . In addition, the hydraulic pressure in the first oil chamber R1 is discharged to the tank 32 via the port f, the oil passage p2, the ports e and c, and the oil passages p4 and p6. By supplying the hydraulic pressure to the second oil chamber R2 and discharging the hydraulic pressure from the first oil chamber R1, the second inertia body M2 integrated with the piston 21 is biased in the other direction with respect to the cylinder 22. . Then, due to the reaction force (reaction), the first inertial body M1 is biased in one direction, that is, the direction opposite to the other direction which is the vibration direction of the vibration source A, via the cylinder 22 and the mounting member 51. As a result, vibration is suppressed.

As described above, according to the vibration damping device 1 of the present embodiment, a precise and fragile sensor such as a sensor that electrically detects vibration of the vibration source A and an electronic control device that performs vibration damping based on the detection result. The vibration of the first inertial body M1 can be suppressed by a mechanical configuration without using a device. Furthermore, according to the present embodiment, even when power is not supplied due to a power failure or the like, the vibration damping device 1 operates effectively, and even if a failure occurs in the vibration damping device 1, vibration suppression is possible. The device 1 can realize so-called fail-safe without running away.
Furthermore, according to the vibration damping device 1, since the position of the third inertial body M3 is an approximate point of a stationary point on the absolute coordinates, a stable operation is performed as the target position of the first inertial body M1 that is the object of vibration suppression. Can be secured.
<Embodiment 2>

A vibration damping device 2 according to Embodiment 2 to which the present invention is applied will be described with reference to FIG. In addition, the figure is a figure which illustrates typically the structure and operation | movement of the damping device 2 of Embodiment 2. FIG.
As shown in FIG. 2, the vibration damping device 2 is interposed between the vibration source A and the first inertial body M <b> 1 (for example, a building), and includes a hydraulic pressure source 30, a switching device 10, and an actuator 20. Configured.

  A spring K1 and a damper C1 are interposed between the vibration source A and the first inertia body M1. When the vibration source A vibrates rightward (one direction: positive direction) and leftward (other direction: negative direction) in FIG. 2, the vibration is transmitted to the first inertial body M1 via the spring K1 and the damper C1. Communicated. Corresponding to the displacement z of the vibration source A, a force F acts on the first inertial body M1 via the spring K1 and the damper C1, and as a result, the displacement of the first inertial body M1 becomes x1.

  The hydraulic pressure source 30 includes a tank 32 that stores hydraulic oil, and a pump 31 that supplies the hydraulic oil stored in the tank 32 to the switching device 10.

  The switching device 10 has a valve body (valve body) 12 and a spool 11. The valve body 12 is formed in a cylindrical shape, and is provided with ports a, b, c, d, and e through which hydraulic pressure enters and exits. The valve body 12 is configured integrally with the second inertial body M2. A piston 21 of the actuator 20 described later is also configured integrally with the second inertia body M2. That is, in this embodiment, the valve body 12 of the switching device 10, the piston 21 of the actuator, and the second inertial body M2 are integrally configured. Here, the second inertia body M2 is connected to the vibration source A via the spring K2 and the damper C2, and as a whole, the vibration is not transmitted or is hardly transmitted, that is, the inertia force is moderately large and difficult to move. It has a configuration. Here, in principle, it is sufficient that it is difficult to move as compared with the spool 11 that it is difficult to move.

  The spool 11 is connected to the vibration source A and the first inertial body M1 via the link mechanism 40. The spool 11 has a plurality of land portions 14 and a spool shaft (link) 43. The link mechanism 40 has links 41, 42, 43, 44. The link 41 has an end 40 a that is swingably connected to the vibration source A, and an end 40 b that is swingably connected to the center of the link 42. The end portion 40c of the link 43 is swingably connected to the upper portion of the link 42. The link 44 has an end 40d that is swingably connected to the lower portion of the link 42, and an end 40e that is swingably connected to the first inertial body M1.

  The actuator 20 has a cylinder 22 and a piston 21. The cylinder 22 is formed in a cylindrical shape and has a port f and a port g. The cylinder 22 constitutes the base portion B together with the mounting member 51, and is connected to the first inertia body M1 via the mounting member 51. The piston 21 is configured integrally with the second inertial body M2. The second inertia body M2 is coupled to the vibration source A via the spring K2 and the damper C2. When the displacement of the vibration source A becomes z, the second inertia body M2 and the piston 21 are displaced by x2 via the spring K2 and the damper. The inside of the cylinder 22 is partitioned by the piston 21 into a first oil chamber R1 having a port f and a second oil chamber R2 having a port g.

  A plurality of oil passages are provided between the hydraulic pressure source 30 and the switching device 10 described above and between the switching device 10 and the actuator 20. An oil passage p1 extends from the pump 31 of the hydraulic power source 30 and is connected to the port b of the valve body 12 of the switching device 10. An oil passage (first oil passage) p <b> 2 extends from the port e of the cylinder 12 and is connected to the port f of the cylinder 22. An oil passage (second oil passage) p <b> 3 extends from the port d of the valve body 12 and is connected to the port g of the cylinder 22. An oil passage p5 extends from the port a of the valve body 12, and an oil passage p4 extends from the port c. The oil passages p5 and p4 merge to form an oil passage p6, which is a tank of the hydraulic power source 30. 32.

  The vibration damping device 1 configured as described above operates as follows.

  When the vibration source A moves in one direction (right side in FIG. 2), the spool 11 moves relative to the valve body 12 of the switching device 10 to the right via the link mechanism 40, and the first inertial body. M1 moves in one direction via the spring K1 and the damper C1. By relative movement of the spool 11 in one direction, the port c is closed, the remaining ports a, b, d, e are opened, the ports b, e are communicated, and the ports a, d are communicated. As a result, the hydraulic pressure generated by the pump 31 of the hydraulic power source 30 is supplied to the first oil chamber R1 via the oil passage p1, the ports b and e, the oil passage p2, and the port f of the cylinder 22 of the actuator 20. . The hydraulic pressure in the second oil chamber R2 is discharged to the tank 32 through the port g, the oil passage p3, the ports d and a, and the oil passages p5 and p6. By supplying the hydraulic pressure to the first oil chamber R1 and discharging the hydraulic pressure from the second oil chamber R2, the second inertia body M2 integrated with the piston 21 is urged in one direction with respect to the cylinder 22. . Then, due to the reaction force (reaction), the first inertial body M1 is urged through the cylinder 22 and the attachment member 51 in the other direction, that is, the direction opposite to the one direction that is the vibration direction of the vibration source A. As a result, vibration is suppressed.

  When the vibration source A moves in the other direction (left side in FIG. 2), the spool 11 moves relative to the valve main body 12 of the switching device 10 in the other direction via the link mechanism 40. The inertia body M1 moves in the other direction via the spring K1 and the damper C1. By the relative movement of the spool 11 in the other direction, the port a is closed, the remaining ports b, c, d, e are opened, the ports b, d are communicated, and the ports c, e are communicated. As a result, the hydraulic pressure generated by the pump 31 of the hydraulic power source 30 is supplied to the second oil chamber R2 via the oil passage p1, the ports b and d, the oil passage p3, and the port g of the cylinder 22 of the actuator 20. . In addition, the hydraulic pressure in the first oil chamber R1 is discharged to the tank 32 via the port f, the oil passage p2, the ports e and c, and the oil passages p4 and p6. By supplying the hydraulic pressure to the second oil chamber R2 and discharging the hydraulic pressure from the first oil chamber R1, the second inertia body M2 integrated with the piston 21 is biased in the other direction with respect to the cylinder 22. . Then, due to the reaction force (reaction), the first inertial body M1 is biased in one direction, that is, the direction opposite to the other direction which is the vibration direction of the vibration source A, via the cylinder 22 and the mounting member 51. As a result, vibration is suppressed.

  Thus, according to the present embodiment, a precise and fragile device such as a sensor that electrically detects vibration of the vibration source A and an electronic control device that performs vibration control based on the detection result is used. However, the vibration of the first inertial body M1 can be suppressed by a mechanical configuration. Furthermore, according to the present embodiment, even if power is not supplied due to a power failure or the like, the vibration damping device 2 operates effectively, and even if a failure occurs in the vibration damping device 2, vibration suppression is possible. The device 2 can realize so-called fail-safe without running away.

  The vibration damping device 2 of the present embodiment can construct a system that can achieve the object with the minimum necessary mechanism. The spool 11 and the cylinder 22 operate relatively in response to the movement of the vibration source A (displacement Z) and the first inertial body M1 (displacement x1). The movement of the vibration source A operates as feedforward, and the movement of the first inertial body M1 operates as feedback.

  Next, with reference to FIG. 3, a vibration damping device 2 </ b> A that is Modification 1 of the above-described vibration damping device 2 will be described. The vibration damping device 2A is interposed between the bottom (lower part) of the building as the first inertial body M1 and the ground as the vibration source A, and has a more specific configuration than the vibration damping device 2. It has become.

  As shown in FIG. 3, the vibration damping device 2A is interposed between the vibration source (ground) A and the first inertial body (building) M1, and includes the hydraulic power source 30, the switching device 10, and the actuator 20. It is prepared for.

  A spring K1 and a damper C1 are interposed between the vibration source A and the first inertia body M1. When the vibration source A vibrates rightward (one direction: positive direction) and leftward (other direction: negative direction) in FIG. 3, the vibration is transmitted to the first inertial body M1 via the spring K1 and the damper C1. Communicated. Corresponding to the displacement z of the vibration source A, a force F acts on the first inertial body M1 via the spring K1 and the damper C1, and as a result, the displacement of the first inertial body M1 becomes x1.

  The hydraulic pressure source 30 includes a tank (not shown) that stores hydraulic oil, and a pump (not shown) that supplies the hydraulic oil stored in the tank to the switching device 10.

  The switching device 10 includes a valve main body 12 supported by the second inertia body M2 so as to be movable in the left-right direction, and a spool (not shown) that moves in the left-right direction inside the valve main body 12. The spool is connected to the vibration source A and the first inertial body M1 via the link mechanism 40. The link mechanism 40 includes a link 41a extending in the vertical direction, a link 41b swingably connected to the upper end of the link 41a, and a link 41b extending rightward, and swingably connected to the right end of the link 41b. A link 42, a link 43 that is swingably connected to the lower end of the link 42 and that extends to the right and is configured integrally with the spool, and a link 43 that is swingably connected to the upper end of the link 42 And a link 44b that is swingably connected to the right end of the link 44a and that extends upward and is connected to the first inertial body M1.

  The actuator 20 includes a cylinder 22 that is integral with the mounting member 51 fixed to the vibration source A and extends in the left-right direction, and a piston 21 that moves in the cylinder 22 in the left-right direction. The cylinder 22 forms a base portion B together with the mounting member 51 and is connected to the vibration source A via the mounting member 51. The piston 21 is configured integrally with the second inertial body M2, and the second inertial body M2 is connected to a part of the first inertial body M1 via a spring K2 and a damper C2. In the vibration damping device 2A, the cylinder 22 is fixed to the vibration source A side and the piston 21 is connected to the first inertial body M1 side via the spring K2 and the damper C2 in reverse to the vibration damping device 2 described above. .

The hydraulic pressure source 30 is connected to the switching device 10 by an oil passage p1, oil passages p4, p5, and p6. The switching device 10 and the actuator 20 include an oil passage (first oil passage) p2, an oil passage (second oil passage). ) Linked by p3.
The vibration damping device 2A configured as described above operates as follows.

  When the vibration source A moves in one direction (rightward in FIG. 3), the spool moves relative to the valve body 12 of the switching device 10 via the link mechanism 40 to the right, and the first inertial body M1. Moves in one direction via the spring K1 and the damper C1. By the relative movement of the spool in one direction, the oil pressure from the oil pressure source 30 is supplied to the first oil chamber R1 of the cylinder 22 via the oil passage p1, the switching device 10, and the oil passage p2. Further, the hydraulic pressure in the second oil chamber R2 is discharged to the tank of the hydraulic power source 30 via the oil passage p3, the switching device 10, and the oil passages p5 and p6. By supplying the hydraulic pressure to the first oil chamber R1 and discharging the hydraulic pressure from the second oil chamber R2, the second inertia body M2 integrated with the piston 21 moves in the other direction (in FIG. 3). It is energized to the left. By biasing the second inertial body M2 in the other direction, the first inertial body M1 is opposite to the other direction, that is, the moving direction of the vibration source A and the first inertial body M1 via the spring K2 and the damper C2. The vibration is suppressed by being urged in the direction.

  When the vibration source A moves in the other direction (leftward in FIG. 3), vibration in the other direction of the first inertial body M1 is suppressed by the same mechanism as described above.

  As described above, according to the vibration damping device 2A of the first modification, a precise and fragile sensor such as a sensor that electrically detects vibration of the vibration source A and an electronic control device that performs vibration damping based on the detection result. The vibration of the first inertial body M1 can be suppressed by a mechanical configuration without using a device. Furthermore, according to the present modification, even when power is not supplied due to a power failure or the like, the vibration damping device 2A operates effectively, and even if a failure occurs in the vibration damping device 2A, vibration damping The device 2A can realize so-called fail-safe without running away.

  Furthermore, according to the vibration damping device 2A of the first modification, even with a large structure, it is possible to reliably perform a large vibration damping with a small amount of energy. That is, the spring K1 supporting the first inertial body M1, which is a structure, can be constituted by a weak spring (a spring having a small spring constant). Therefore, energy (for example, earthquake energy) is generated by vibration of the vibration source A. Among them, the energy applied to the structure via the spring K1 is small, and the work of the cylinder 22 for removing the small energy may be small.

  Next, with reference to FIG. 4, a vibration damping device 2B, which is a modified example 2 of the vibration damping device 2 described above, will be described. The vibration damping device 2B is interposed between the vehicle body as the first inertial body M1 and the axle as the vibration source A, and has a more specific configuration than the vibration damping device 2. Yes. The vibration source A includes an axle A1 that swings in a substantially vertical direction with a fulcrum A3 as a swing center, and a wheel A2 that is rotatably supported by the axle A1.

  As shown in FIG. 4, the vibration damping device 2B is interposed between the vibration source A and the first inertial body (vehicle body) M1, and includes a hydraulic pressure source 30, a switching device 10, and an actuator 20. Has been.

  A spring K1 and a damper C1 are interposed between the vibration source A and the first inertia body M1. When the vibration source A vibrates upward (one direction: positive direction) and downward (other direction: negative direction) in FIG. 4, the vibration is transmitted to the first inertial body M1 via the spring K1 and the damper C1. The Corresponding to the displacement z of the vibration source A, a force F (not shown) acts on the first inertial body M1 via the spring K1 and the damper C1, and as a result, the displacement of the first inertial body M1 is x1. It becomes.

  The hydraulic pressure source 30 is mounted on the first inertial body M1 and includes a tank 32 that stores hydraulic oil and a pump 31 that supplies the hydraulic oil stored in the tank 32 to the switching device 10.

  The switching device 10 includes a valve main body 12 that is fixed to the second inertia body M2 and extends in the vertical direction, and a spool (not shown) that slides in the vertical direction inside the valve main body 12. The spool is connected to the vibration source A and the first inertial body M1 via the link mechanism 40. The link mechanism 40 includes a link 41 whose lower end is swingably connected to the vibration source A and extends upward, a link 42 swingably connected to the upper end of the link 41, and one end of the link 42. And is linked to the other end of the link 42 so as to be swingable, and extends upward to be swingably connected to the first inertial body M1. Link 44.

  The actuator 20 has a cylinder 22 whose upper end is swingably connected to the first inertial body M1 and extends downward, and a piston (not shown) that slides up and down in the cylinder 22. The piston is configured integrally with the second inertial body M2, and the second inertial body M2 is connected to the vibration source A via a spring K2 and a damper C2.

The hydraulic pressure source 30 is connected to the switching device 10 by an oil passage p1, oil passages p4, p5, and p6. The switching device 10 and the actuator 20 include an oil passage (first oil passage) p2, an oil passage (second oil passage). P3
Are connected by

  The vibration damping device 2B having the above-described configuration operates as follows.

  When the vibration source A moves in one direction (upward in FIG. 4), the spool moves upward relative to the valve body 12 of the switching device 10 via the link mechanism 40, and the first inertial body M1 springs. It moves in one direction via K1 and damper C1. By the relative movement of the spool in one direction, the oil pressure from the oil pressure source 30 is supplied to the first oil chamber R1 of the cylinder 22 via the oil passage p1, the switching device 10, and the oil passage p2. Further, the hydraulic pressure in the second oil chamber R2 is discharged to the tank 32 of the hydraulic power source 30 through the oil passage p3, the switching device 10, and the oil passages p5 and p6. Due to the supply of the hydraulic pressure to the first oil chamber R1 and the discharge of the hydraulic pressure from the second oil chamber R2, the second inertia body M2 integrated with the piston moves in one direction (the upper direction in FIG. 4). ). By the reaction of the biasing of the second inertial body M2 in one direction, the cylinder 22 and the first inertial body M1 integrated with the cylinder 22 are biased in the other direction opposite to the vibration direction x1 to suppress the vibration.

  When the vibration source A moves in the other direction (downward in FIG. 4), vibration in the other direction of the first inertial body M1 is suppressed by the same mechanism as described above.

  As described above, according to the vibration damping device 2B of the second modification, a precise and fragile sensor such as a sensor that electrically detects vibration of the vibration source A and an electronic control device that performs vibration damping based on the detection result. The vibration of the first inertial body M1 can be suppressed by a mechanical configuration without using a device. Furthermore, according to this modification, even when power is not supplied due to a power failure or the like, the vibration control device 2B operates effectively, and even if a failure occurs in the vibration control device 2B, vibration control is performed. The device 2B can realize so-called fail-safe without running away.

Furthermore, according to the vibration damping device 2B of Modification 2, for example, a system can be constructed with only small components as a vibration damping device mounted on an automobile. The hydraulic pressure is small, light weight, high output and high response. No matter how good the performance is, its own weight is heavy and it requires a lot of space, so it is not suitable for practical use. Since the spool and the cylinder 22 are small and light, they can fit in the suspension space without any problem, and a lightweight system can be constructed. Furthermore, since expensive measurement and control devices are unnecessary, it is suitable for mass production.
<Embodiment 3>

  A vibration damping device 3 according to Embodiment 3 to which the present invention is applied will be described with reference to FIG. In addition, the figure is a figure which illustrates typically the structure and operation | movement of the damping device 3 of Embodiment 3. FIG.

  As shown in FIG. 5, the vibration damping device 3 is interposed between the vibration source A and the first inertial body M <b> 1 (for example, a building), and includes a hydraulic pressure source 30, a switching device 10, and an actuator 20. Configured.

  A spring K1 and a damper C1 are interposed between the vibration source A and the first inertia body M1. When the vibration source A vibrates rightward (one direction: positive direction) and leftward (other direction: negative direction) in FIG. 5, the vibration is transmitted to the first inertial body M1 via the spring K1 and the damper C1. Communicated. Corresponding to the displacement z of the vibration source A, the force f acts on the first inertial body M1 via the spring K1 and the damper C1, and as a result, the displacement of the first inertial body M1 becomes x1.

  The hydraulic pressure source 30 includes a tank 32 that stores hydraulic oil, and a pump 31 that supplies the hydraulic oil stored in the tank 32 to the switching device 10.

  The switching device 10 has a valve body (valve body) 12 and a spool 11. The valve body 12 is formed in a cylindrical shape, and is provided with ports a, b, c, d, and e through which hydraulic pressure enters and exits. The valve body 12 is configured integrally with the third inertial body M3. Note that a piston 21 of the actuator 20 described later is also configured integrally with the third inertial body M3. That is, in this embodiment, the valve body 12 of the switching device 10, the piston 21 of the actuator, and the third inertia body M3 are integrally configured. Here, the third inertial body M3 is connected to a link 62 of the link mechanism 60 described later via a spring K3, so that the vibration is not transmitted or hardly transmitted as a whole, that is, the inertial force is moderately large. It is difficult to move. Here, in principle, it is sufficient that it is difficult to move as compared with the spool 11 that it is difficult to move.

  The spool 11 is connected to the first inertial body M1 and the second inertial body M2 via the link mechanism 70. The spool 11 has a plurality of land portions 14 and a spool shaft (link) 73. The link mechanism 70 has links 71, 72, 73 and 74. The link 71 has an end 70 a that is swingably connected to the first inertia body M 1, and an end 70 b that is swingably connected to the center of the link 72. The end portion 70 c of the link 73 is swingably connected to the upper portion of the link 42. The end portion 70d of the link 74 is swingably connected to the lower portion of the link 72, and the end portion 70e is swingably connected to the second inertia body M2.

  The actuator 20 has a cylinder 22 and a piston 21. The cylinder 22 is formed in a cylindrical shape and has a port f and a port g. The cylinder 22 constitutes the base portion B together with the mounting member 51 and is connected to the first inertia body M <b> 1 via the mounting member 51. The piston 21 is configured integrally with the third inertial body M3. The third inertia body M3 is connected to the center of the link 62 via the spring K3. The link mechanism 60 has links 61, 62 and 63. The link 61 has an end 60 a that is swingably connected to the first inertia body M 1, and an end 60 b that is swingably connected to the upper portion of the link 62. The link 63 has an end 60d that is swingably connected to the lower portion of the link 62, and an end 60e that is swingably connected to the second inertial body M2. When the displacement of the vibration source A becomes z, the third inertial body M3, the piston 21, and the valve body 12 are displaced by x3 via the link mechanism 60 and the spring K3. The inside of the cylinder 22 is partitioned by the piston 21 into a first oil chamber R1 having a port f and a second oil chamber R2 having a port g.

  A plurality of oil passages are provided between the hydraulic pressure source 30 and the switching device 10 described above and between the switching device 10 and the actuator 20. An oil passage p1 extends from the pump 31 of the hydraulic power source 30 and is connected to the port b of the valve body 12 of the switching device 10. An oil passage (first oil passage) p <b> 2 extends from the port e of the cylinder 12 and is connected to the port f of the cylinder 22. An oil passage (second oil passage) p <b> 3 extends from the port d of the valve body 12 and is connected to the port g of the cylinder 22. An oil passage p5 extends from the port a of the valve body 12, and an oil passage p4 extends from the port c. The oil passages p5 and p4 merge to form an oil passage p6, which is a tank of the hydraulic power source 30. 32.

  The vibration damping device 3 configured as described above operates as follows.

  When the vibration source A moves in one direction (to the right in FIG. 5) and the first inertial body M1 moves in one direction via the spring K1 and the damper C1, the spool is moved against the valve body 12 of the switching device 10. 11 relatively moves in one direction through the link mechanism 70. By relative movement of the spool 11 in one direction, the port c is closed, the remaining ports a, b, d, e are opened, the ports b, e are communicated, and the ports a, d are communicated. As a result, the hydraulic pressure generated by the pump 31 of the hydraulic power source 30 is supplied to the first oil chamber R1 via the oil passage p1, the ports b and e, the oil passage p2, and the port f of the cylinder 22 of the actuator 20. . The hydraulic pressure in the second oil chamber R2 is discharged to the tank 32 through the port g, the oil passage p3, the ports d and a, and the oil passages p5 and p6. The third inertia body M3 integrated with the piston 21 is urged in one direction with respect to the cylinder 22 by supplying the hydraulic pressure to the first oil chamber R1 and discharging the hydraulic pressure from the second oil chamber R2. . Accordingly, the second inertia body M2 is biased in one direction via the spring K3 and the link mechanism 60. And by the reaction force (reaction), the first inertial body M1 is urged through the link mechanism 60 in the other direction, that is, the direction opposite to the one direction that is the vibration direction of the vibration source A, Vibration is suppressed.

  When the vibration source A moves in the other direction (left side in FIG. 5) and the first inertia body M1 moves in the other direction via the spring K1 and the damper C1, the valve body 12 of the switching device 10 is moved. Thus, the spool 11 moves relative to the other direction via the link mechanism 70. By the relative movement of the spool 11 in the other direction, the port a is closed, the remaining ports b, c, d, e are opened, the ports b, d are communicated, and the ports c, e are communicated. As a result, the hydraulic pressure generated by the pump 31 of the hydraulic power source 30 is supplied to the second oil chamber R2 via the oil passage p1, the ports b and d, the oil passage p3, and the port g of the cylinder 22 of the actuator 20. . In addition, the hydraulic pressure in the first oil chamber R1 is discharged to the tank 32 via the port f, the oil passage p2, the ports e and c, and the oil passages p4 and p6. By supplying the hydraulic pressure to the second oil chamber R2 and discharging the hydraulic pressure from the first oil chamber R1, the second inertia body M2 integrated with the piston 21 is biased in the other direction with respect to the cylinder 22. . Accordingly, the second inertia body M2 is biased in the other direction via the spring K3 and the link mechanism 60. And by the reaction force (reaction), the first inertial body M1 is urged through the link mechanism 60 in one direction, that is, the direction opposite to the other direction which is the vibration direction of the vibration source A, Vibration is suppressed.

  As described above, according to the vibration damping device 3 of the present embodiment, the sensor that electrically detects the vibration of the vibration source A and the electronic control device that performs vibration damping based on the detection result are sensitive and fragile. The vibration of the first inertial body M1 can be suppressed by a mechanical configuration without using a device. Furthermore, according to the present embodiment, even when power is not supplied due to a power failure or the like, the vibration damping device 3 operates effectively, and even if a failure occurs in the vibration damping device 3, the vibration damping device The device 3 can realize so-called fail-safe without running away.

  The damping purpose of the damping device 3 of the present embodiment is the first inertial body M1. Therefore, the second inertial body M2 can vibrate as much as possible, and can be operated greatly without any particular restriction.

  Next, a vibration damping device 3A, which is a modification of the above-described vibration damping device 3, will be described with reference to FIG.

  As shown in FIG. 6, the vibration damping device 3 </ b> A is provided on the roof of the building as the first inertial body M <b> 1, and includes the hydraulic power source 30, the switching device 10, and the actuator 20.

  In the present modification, the first inertia body M1 itself acts as the spring K1 and the damper C1. When the vibration source A vibrates rightward (one direction: positive direction) and leftward (other direction: negative direction) in FIG. 6, the vibration is transmitted to the first inertial body M1. Corresponding to the displacement z of the vibration source A, the displacement of the first inertial body M1 is x1.

  The hydraulic pressure source 30 includes a tank (not shown) that stores hydraulic oil, and a pump (not shown) that supplies the hydraulic oil stored in the tank to the switching device 10.

  The switching device 10 includes a valve main body 12 supported by a third inertial body M3, which will be described later, so as to be movable in the left-right direction, and a spool (not shown) that moves inside the valve main body 12 in the left-right direction. The spool is connected to the first inertial body M1 and the second inertial body M2 via the link mechanism 70. The link mechanism 70 includes an attachment member (a part of the first inertial body M1) Mb that extends in the vertical direction, a link 71 that is swingably connected to the upper end of the attachment member Mb, and extends to the right. A link 72 that is swingably connected to the right end and extends vertically, a link 73 that is swingably connected to the upper end of the link 72 and extends to the left, and is configured integrally with the spool, and a link 72 And a link 74 that extends to the right and is connected to the second inertia body M2 in a swingable manner.

  Further, a link mechanism 60 is interposed between the first inertial body M1 and the second inertial body M2. The link mechanism 60 has a left end that is pivotably connected to the mounting member Mb and extends rightward, a link 62 that is swingably connected to the link 61 and extends downward, and the link 62. And a link 63 extending to the right and movably connected to the second inertia body M2. A spring K3 is interposed between the link 62 and the third inertia body M3 at the center in the vertical direction. Further, the above-described second inertia body M2 is provided with rollers Ma and the like between the first inertia body M1 and can easily move relative to the first inertia body M1 in the left-right direction. ing.

  The actuator 20 includes a cylinder 22 that is fixed to the upper portion (the roof of the building) of the first inertial body M1 via the mounting member 51 and extends in the left-right direction, and a piston 21 that moves in the left-right direction along the cylinder 22. doing. The cylinder 22 forms a base portion B together with the mounting member 51. The piston 21 is configured integrally with the third inertial body M3. The right end of the third inertial body M3 is connected to the link 62 via a spring K3.

  The vibration damping device 3A configured as described above operates as follows.

  When the vibration source A moves in one direction (rightward in FIG. 6), the first inertial body M1 moves in the same direction (rightward), and the mounting member Mb integrated therewith moves in the same direction. As a result, the spool of the switching device 10 moves relative to the valve body 12 to the right via the links 71, 72, 73 of the link mechanism 70. Thereby, the hydraulic pressure from the hydraulic pressure source 30 is supplied to the first oil chamber R1 of the cylinder 22 through the oil passage p1, the switching device 10, and the oil passage (first oil passage) p2. The hydraulic pressure in the second oil chamber R2 is discharged to the tank of the hydraulic power source 30 through the oil passage (second oil passage) p3, the switching device 10, and the oil passages p5 and p6. By supplying the hydraulic pressure to the first oil chamber R1 and discharging the hydraulic pressure from the second oil chamber R2, the third inertial body M3 integrated with the piston 21 moves in one direction with respect to the cylinder 22 (in FIG. 6). It is energized to the right). Accordingly, the second inertia body M2 is biased in one direction (rightward) via the spring K3 and the links 62 and 63. Then, due to the reaction, the first inertial body M1 is biased in the other direction (leftward in FIG. 6) via the links 63, 62, 61 and the attachment member Mb, and the vibration in the arrow x1 direction is suppressed. It is suppressed.

  When the vibration source A moves in the other direction (left side in FIG. 6), vibration in the other direction of the first inertial body M1 is suppressed by the same mechanism as described above.

  As described above, according to the vibration damping device 3A of the present modification, a precise and fragile sensor such as a sensor that electrically detects vibration of the vibration source A and an electronic control device that performs vibration damping based on the detection result. The vibration of the first inertial body M1 can be suppressed by a mechanical configuration without using a device. Furthermore, according to the vibration damping device 3A of the present modification, even if power is not supplied due to a power failure or the like, the vibration damping device 3A operates effectively and a failure occurs in the vibration damping device 3A. Even in this case, the vibration damping device 3A can realize so-called fail-safe without running away.

  Furthermore, the vibration damping device 3A of the present modification can be applied when the mass of the first inertial body M1 is large, and the effect is ease of use such as reducing the vibration of the first inertial body M1 to some extent. . Further, even when a strong wind strikes the first inertial body M1, the vibration can be similarly controlled. For example, if the damping device 3A is pressure-accumulated in an accumulator, it can be operated while the pressure remains even if a power failure occurs during a disaster. Usually, it is sufficient to store the animal pressure with a small hydraulic power source A, so that energy-saving operation can be performed.

DESCRIPTION OF SYMBOLS 1 Damping device of Embodiment 1 2 Damping device of Embodiment 2A Damping device of a modification of the damping device 3 of Embodiment 2 2B Damping device of another modification of the damping device 3 of Embodiment 2 DESCRIPTION OF SYMBOLS 3 Damping apparatus of 3rd Embodiment 3A Damping apparatus of the modification of the damping apparatus 3 of 3rd Embodiment 10 Switching apparatus 11 Spool 12 Valve body 20 Actuator 21 Piston 22 Cylinder 30 Hydraulic power source 40 Link mechanism 60 Link mechanism 70 Link mechanism A Vibration source B Base part C1, C2, C3 Damper K1, K2, K3 Spring M1 1st inertial body M2 2nd inertial body M3 3rd inertial body

Claims (3)

In the vibration damping device that suppresses vibration of the first inertial body that vibrates alternately in one direction and the other direction by transmission of vibration from the vibration source,
A hydraulic pressure source for generating hydraulic pressure;
The hydraulic pressure supplied from the hydraulic pressure source by moving relative to the valve main body and the valve main body is changed between the first oil passage and the second oil pressure corresponding to the vibration in the one direction and the other direction of the first inertial body. A switching device having a spool for switching to an oil passage and outputting;
An actuator having a base connected to one of the first inertial body and the vibration source, and a second inertial body movable in the one direction and the other direction with respect to the base; With
The actuator is
A cylinder coupled to one of the first inertial body and the second inertial body;
A piston connected to the other and moving in the cylinder,
The cylinder is
Having a first oil chamber connected to the first oil passage on one side across the piston, and a second oil chamber connected to the second oil passage on the other side;
The second inertial body is urged in the one direction by the hydraulic pressure supplied from the first oil passage to the first oil chamber, and the reaction in the other direction is caused to act on the first inertial body. With the hydraulic pressure supplied from the oil passage to the second oil chamber, the second inertial body is urged in the other direction to cause the reaction in the one direction to act on the first inertial body ,
The switching device includes a third inertial body in which vibration of the vibration source is not transmitted or is not easily transmitted,
The valve body is configured integrally with the third inertial body, and the spool is configured integrally with the vibration source.
A vibration damping device characterized by that. In the vibration damping device that suppresses vibration of the first inertial body that vibrates alternately in one direction and the other direction by transmission of vibration from the vibration source,
A hydraulic pressure source for generating hydraulic pressure;
The hydraulic pressure supplied from the hydraulic pressure source by moving relative to the valve main body and the valve main body is changed between the first oil passage and the second oil pressure corresponding to the vibration in the one direction and the other direction of the first inertial body. A switching device having a spool for switching to an oil passage and outputting;
An actuator having a base connected to one of the first inertial body and the vibration source, and a second inertial body movable in the one direction and the other direction with respect to the base; With
The actuator is
A cylinder coupled to one of the first inertial body and the second inertial body;
A piston connected to the other and moving in the cylinder,
The cylinder is
Having a first oil chamber connected to the first oil passage on one side across the piston, and a second oil chamber connected to the second oil passage on the other side;
The second inertial body is urged in the one direction by the hydraulic pressure supplied from the first oil passage to the first oil chamber, and the reaction in the other direction is caused to act on the first inertial body. With the hydraulic pressure supplied from the oil passage to the second oil chamber, the second inertial body is urged in the other direction to cause the reaction in the one direction to act on the first inertial body,
The switching device includes a link mechanism that is connected to the vibration source and the spool and moves the spool relative to the valve body.
A vibration damping device characterized by that. In the vibration damping device that suppresses vibration of the first inertial body that vibrates alternately in one direction and the other direction by transmission of vibration from the vibration source,
A hydraulic pressure source for generating hydraulic pressure;
The hydraulic pressure supplied from the hydraulic pressure source by moving relative to the valve main body and the valve main body is changed between the first oil passage and the second oil pressure corresponding to the vibration in the one direction and the other direction of the first inertial body. A switching device having a spool for switching to an oil passage and outputting;
An actuator having a base connected to one of the first inertial body and the vibration source, and a second inertial body movable in the one direction and the other direction with respect to the base; With
The actuator is
A cylinder coupled to the first inertial body;
A piston connected to the second inertial body and moving in the cylinder;
The cylinder is
Having a first oil chamber connected to the first oil passage on one side across the piston, and a second oil chamber connected to the second oil passage on the other side;
The second inertial body is urged in the one direction by the hydraulic pressure supplied from the first oil passage to the first oil chamber, and the reaction in the other direction is caused to act on the first inertial body. With the hydraulic pressure supplied from the oil passage to the second oil chamber, the second inertial body is urged in the other direction to cause the reaction in the one direction to act on the first inertial body,
In the second inertial body, the piston is configured as a separate body, and is urged in the same direction as the piston by the movement of the piston.
A vibration damping device characterized by that.

Images