JP3409567B2 - Anti-vibration support device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration supporting device for supporting a vibrating body, such as an engine of a vehicle, which periodically oscillates, on a supporting body such as a vehicle body while isolating the same.
The present invention relates to a device provided with a residual vibration detecting means for detecting a residual vibration after the vibration input from the vibrating body and the control vibration generated in the vibration isolation support device are interfered with each other.

[0002]

2. Description of the Related Art An engine mount, which is a vibration isolation support device generally used to support a power unit of a vehicle, has a good vibration isolation function mainly for idle vibration, muffled sound vibration, noise vibration during acceleration, and the like. Of these various vibrations, 20-30 are required to be demonstrated.
In order to reduce the idle vibration, which is a vibration with a relatively large amplitude of about Hz, the characteristics required of the anti-vibration support device are a high dynamic spring constant and high damping, while a characteristic of 80-800 Hz is relatively high. The characteristics required for the vibration-proof support device in order to reduce the muffled noise vibration and the noise noise during acceleration, which are small and medium amplitude vibrations, are a low dynamic spring constant and a low damping. Therefore, it is difficult to prevent all vibrations with an ordinary engine mount made of an elastic body or a conventional liquid-filled engine mount.

Therefore, Japanese Patent Laid-Open Publication No. 7-223444 (hereinafter referred to as "prior art") discloses a vibration-damping support device capable of actively damping and supporting a vibration body such as an automobile engine. The technology is known.

In this prior art, a supporting elastic body interposed between the engine side and the vehicle body side, a main fluid chamber defined by the supporting elastic body, and one side of the main fluid chamber in the engine supporting direction (here, , An upper part on the engine side), a sub-fluid chamber of variable volume communicating through an orifice, a main fluid chamber, a fluid enclosed in the sub-fluid chamber and the orifice, and a partition wall of the main fluid chamber. A magnetic path member forming a part,
A leaf spring that elastically supports the magnetic path member so as to be displaceable in a direction that changes the volume of the main fluid chamber, and an electromagnetic actuator that generates a displacement force that displaces the magnetic path member in the direction. Also, by arranging a diaphragm on the upper part of the engine side, the space above this diaphragm communicates with atmospheric pressure, and by arranging the orifice structure in the space below this diaphragm (the other side in the engine support direction). , A sub-fluid chamber is formed between the diaphragm and the orifice structure.

In this prior art, the pulse generator for detecting the vibration generation state of the engine and generating the reference signal, the residual vibration of the body member (the vibration input from the engine, and the vibration isolation support device) are generated. The acceleration sensor that detects (remaining vibration after interfering with the control vibration) and outputs it as a residual vibration signal, and a displacement signal to the electromagnetic actuator by outputting a drive signal to the electromagnetic actuator based on the residual vibration signal and the reference signal. And a controller for generating.

When vibration is input from the engine side, the pulse generator generates a reference signal corresponding to the reference vibration and outputs it to the controller. When residual vibration occurs on the vehicle body side member, the acceleration sensor causes the vehicle body side member to move. The vibration state of is detected in the form of acceleration and output to the controller as a residual signal. Then, the controller outputs a control signal to the electromagnetic actuator to appropriately vibrate the magnetic path member and changes the volume of the main fluid chamber to control the vibration transmission force to the vehicle body side member to be “0”. To do.

Further, since the main fluid chamber is structured to communicate with the sub fluid chamber via the orifice, the supporting elastic body is deformed by the vibration inputted from the engine side, and the volume change occurs in the main fluid chamber. And the fluid enclosed in the main fluid chamber and the liquid enclosed in the sub-fluid chamber move with each other through the orifice to generate a damping force, so that the action of the passive fluid-filled type vibration damping support device also works. Obtainable.

[0008]

By the way, the acceleration sensor for detecting the vibration state of the member on the vehicle body side in the form of acceleration is
It is easy to detect running noise of the vehicle as residual vibration of the member on the vehicle body side.

Further, the acceleration sensor is installed in a state of being exposed to a member on the vehicle body side near the anti-vibration supporting device, and there is a problem in terms of environmental conditions against adhesion of moisture and the like, contact of flying stones and the like.

The present invention has been made by paying attention to the problems to be solved by the prior art as described above, and it detects residual vibration on the support side with high accuracy and installs it at a position where environmental conditions are favorable. An object of the present invention is to provide a vibration-damping support device that includes the residual vibration detecting means and that can facilitate the initial adjustment work of the residual vibration detecting means.

[0011]

In order to solve the above-mentioned problems, a vibration-damping support device according to a first aspect of the present invention comprises a vibrating body that generates periodic vibrations and a supporting elastic member interposed between the vibrating bodies that support the vibrating body. A body, a fluid chamber defined by the supporting elastic body and having a fluid enclosed therein, and a movable member forming a part of a partition wall of the fluid chamber and displaceable in a direction in which the volume of the fluid chamber is changed. An actuator capable of generating a displacement force for displacing the movable member in the direction, reference signal generating means for detecting a generation state of vibration in the vibrating body and generating a reference signal, and residual vibration on the support side. Residual vibration detecting means for detecting and outputting as a residual vibration signal,
A vibration isolation support device comprising: a control unit that outputs a drive signal to the actuator based on the residual vibration signal and the reference signal to generate the displacement force in the actuator. the residual vibration of the support side and the load sensor for detecting a form of the load, the axis is
The support is placed in a cylindrical device case that faces the vibrating body support direction.
Parts such as elastic body, movable member, actuator
Placed coaxially and positioned on the most support side in this equipment case
Arrange the load sensor coaxially with the first part
However, the load sensor opens from the load sensor to the support side.
The opening of the storage case is closed with a lid-shaped support connecting member,
The load sensor is placed inside to support the device case and
Fix the outer edge portions of the body connecting member to each other, and connect the supporting body side.
Pressing the member toward the first component side with respect to the load sensor
While fixing it to the device case,
The load arranged between the holder-side connecting member and the first component
A predetermined preload is added to the heavy sensor.

The invention according to claim 2 is the periodic vibration.
Intervening between a vibrating body that produces movement and a support that supports it.
And a support elastic body defined by the support elastic body.
One of a fluid chamber in which a fluid is enclosed and a partition wall of the fluid chamber.
To form a part and change the volume of the fluid chamber.
Positionable movable member and this movable member is displaced in the above-mentioned direction.
An actuator capable of generating a displacement force that causes
The reference signal is detected by detecting the vibration generation state in the vibrating body.
Reference signal generating means for generating and residual vibration on the support side
Vibration detection means for detecting and outputting as a residual vibration signal
Based on the residual vibration signal and the reference signal,
The drive signal is output to the actuator, and the actuator
Anti-vibration support comprising:
In the holding device, the residual vibration detecting means is
Side load is a load sensor that detects residual vibration in the form of a load.
In the cylindrical device case whose center is facing the vibrating body support direction,
Support elastic body, movable member, actuator, etc.
Place the product coaxially, and place it on the most support side in this device case.
The load sensor is adjacent and coaxial with the first component located
Place and before opening from the load sensor to the support side
Closing the opening of the device case with a lid-like support member connecting member
The load sensor is placed inside and the device case and
And the outer edge portions of the support connecting member are fixed to each other,
The vibration transmitted from the first component is transferred to the outer edge of the connecting portion.
The load sensor transmits the supporting force of the moving body to the side of the supporting body.
And a cylindrical support that is positioned in parallel in the vibrating body supporting direction.
A holding force transmitting portion is formed, and the support-side connecting member is connected to the load.
While pressing the heavy sensor toward the first component side,
By fixing to the mounting case, the supporting member side connecting member
And predetermined to the load sensor arranged between the first parts
The preload of is added.

The invention according to claim 3 is the same as claim 1 or 2.
2. The vibration-isolating support device according to 2, wherein the support-side connecting portion
Between the material and the first component coaxially with the load sensor.
Place a spacer for reload adjustment and adjust this preload.
Both end surfaces of the spacer for the axial direction are the support side connecting member and the front side.
When the load sensor comes into contact with the first component,
Added preload.

The invention according to claim 4 is the same as claim 1 or 2.
In the anti-vibration support device according to 2, the front part is attached to the first part.
The load sensor is housed by opening toward the support side.
A concave storage hole is formed and the opening of this storage hole
The axial depth from the section to the bottom of the hole can be
The stored load sensor is connected by the support-side connecting member.
It is pressed to the bottom side of the hole and a predetermined preload is applied.
Set to dimensions.

[0015]

[0016]

[0017]

In order to achieve the above object, the present invention has the following constitution. Here, the residual vibration on the side of the support means the residual vibration after the vibration input from the vibrating body and the control vibration generated in the anti-vibration supporting device interfere with each other.

The vibration-damping support device according to claim 1 is
The load sensor detects the residual vibration on the side of the support in the form of a load and outputs it as a residual vibration signal to the control means. As a result, as compared with the conventional device using the acceleration sensor as the residual vibration detecting means, the present invention does not detect the running noise of the vehicle as the vibration state on the support side, but accurately detects the residual vibration on the support side. Therefore, it is possible to perform highly accurate image stabilization control. Also, the load
The heavy sensor is built into the anti-vibration support device with favorable environmental conditions.
Therefore, residual vibration detection means with excellent durability and safety
Can be obtained. Furthermore, the support-side connecting member
By pressing the weight sensor toward the first component side, the load sensor
Since a predetermined preload is added to the
It is possible to eliminate the need for original initial adjustment work.

Further, the invention according to claim 2 is the support side.
The load sensor detects residual vibration in the form of load and
A signal is output to the control means. to this
Therefore, an acceleration sensor was used as the residual vibration detection means.
Compared to conventional devices, the present invention supports vehicle running noise
There is no detection as a vibration condition on the body side,
Since residual vibration can be detected accurately, high precision
Anti-vibration control can be performed. In addition, the load sensor is
Since it is built in the anti-vibration support device with good boundary conditions,
It is possible to obtain residual vibration detection means with excellent durability and safety.
Wear. In addition, the supporting force of the vibrating body transmitted from the first component
Is the parallel position in the vibration sensor support direction of the load sensor.
Since the supporting force transmission part of the connected support part is responsible for the load
The supporting force of the vibrator is not input to the sensor. This allows
Use a small load sensor with a low load range
It becomes possible. In addition, the support side connecting member
Load sensor by pressing the sensor to the first component side
Since a predetermined preload is added to the
It is possible to eliminate the need for own initial adjustment work.

The invention according to claim 3 is the same as claim 1 or
Can obtain the effect of the anti-vibration support device described in 2.
The preload adjustment built in together with the load sensor
The alignment spacer contacts the support-side connecting member and the first component.
The load sensor, a predetermined preload is automatically applied.
Therefore, initial adjustment of the load sensor can be performed easily and with high accuracy.
It can be carried out.

Further , the invention according to claim 4 is the same as claim 1.
Alternatively, it is possible to obtain the effect of the anti-vibration support device described in 2.
In both cases, the vehicle body side connecting member was stored in the storage hole of the first component.
By pressing the load sensor toward the bottom of the hole, the load sensor
Since a predetermined preload is automatically added to the
The initial adjustment of the service can be performed easily and with high accuracy.

[0022]

[0023]

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a so-called active engine mount (hereinafter simply referred to as an engine mount) that actively reduces vibration transmitted from an engine side as a vibrating body to a vehicle body side member as a supporting body. It is applied to). An engine mount denoted by reference numeral 20 in FIG. 1 is disposed on the rear side of the vehicle body of an engine 22 mounted horizontally, and an upper portion thereof is fixed to a bracket 24 and a lower portion thereof is fixed to a vehicle body 26, which serves as a support member 28. Is attached to.

Next, the engine mount 20 of the first embodiment will be described with reference to FIGS. 2 to 8. The engine mount 20 includes mount components such as a support elastic body 32, an inner cylinder 34, a first orifice component 36, and an outer cylinder 38 that define a main fluid chamber, a plurality of orifices, and a sub fluid chamber in a device case 43. And an electromagnetic actuator 52 as an actuator that displaces a movable member elastically supported while forming a part of a partition wall of the main fluid chamber in the lower part of these mount parts in a direction in which the volume of the main fluid chamber changes, The load sensor 54 detects the vibration state of the member 28.

That is, the engine mount 20 is
As described above, the engine-side connecting member 30 in which the two connecting bolts 30a spaced apart from each other in parallel are fixed upward
Is equipped with. A hollow cylindrical portion 30b having an inverted trapezoidal cross section is fixed to a lower portion of the engine side connecting member 30.

On the upper surface of the engine side connecting member 30, an elastic body having a predetermined thickness to serve as the rebound stopper member 31 is vulcanized and adhered in a direction orthogonal to the line connecting the two connecting bolts 30a. A support elastic body 32 is fixed to the lower surface side of the engine side connecting member 30 that is continuous with the rebound stopper rubber 31 so as to cover the lower side of the engine side connecting member 30 and the periphery of the hollow cylindrical portion 30b. It is fixed by vulcanization adhesion.

The support elastic body 32 is a substantially cylindrical elastic body having a wall thickness that is gently inclined downward from the central portion toward the outer peripheral portion, and the outer peripheral surface thereof has a hollow cylindrical portion 30b with an axial center. It is joined by vulcanization adhesion to the inner peripheral surface of the inner cylinder 34 that is coaxially oriented in the vibrating body supporting direction (in this case, the vertical direction).

As shown in FIG. 2, the inner cylinder 34 is gradually reduced in diameter from the upper end cylinder portion 34a to form an inclined portion 34b, and an inclined portion 34b is formed downward from the lower end portion of the inclined surface 34b to the upper end. A small diameter portion 34c having a diameter smaller than that of the tubular portion 34a is formed. An annular portion 34d is formed radially outward from the lower end of the small diameter portion 34c, and the upper end cylinder portion 34a is formed downward from the outer peripheral end of the annular portion 34d.
It is a member in which a lower end cylindrical portion 34e having the same outer peripheral diameter as that of is formed. Then, in the small diameter portion 34c, the first opening hole 34f and the second opening hole 34g are provided at positions symmetrical to each other with respect to the axis.
Are formed. Then, the inclined portion 34b of the inner cylinder 34,
A thin film elastic body 32a continuous from the lower side of the support elastic body 32 is coupled to the inner peripheral surface of the small diameter portion 34c, and the thin film elastic body 32a further includes the annular portion 34d side and the lower end tubular portion 3a.
It extends to the 4e side and is joined to the inner peripheral surfaces of the annular portion 34d and the lower end tubular portion 34e. Here, the lower end portion of the thin film elastic body 32a has a thickened shape. Also, the first
The opening hole 34f is closed by the thin film elastic body 32a to form the first diaphragm 32c, but the second opening hole 34g is formed.
Is open without being blocked by the thin film elastic body 32a.

A hollow portion 32b having a mountain-shaped cross section is formed inside the support elastic body 32, and the first orifice constituting member 36 is fitted into the inner cylinder 34 so as to be located under the hollow portion 32b. Has been done. The first orifice component member 36 includes a minimum diameter tubular portion 36a formed to have a diameter smaller than that of the small diameter portion 34c of the inner tubular member 34, and an annular portion is formed at the upper and lower ends of the minimum diameter tubular portion 36a so as to extend radially outward. It is a tubular member in which 36b and 36c are formed. The annular portion 36b on the upper side is formed such that the outer peripheral diameter thereof is slightly smaller than the small diameter portion 34c of the inner cylinder 34. The lower annular portion 36c is
The diameter of the inner cylinder 34 is smaller than that of the lower end cylinder portion 34e, and the cylindrical end portion 36c extends downward from the outer peripheral end portion thereof.
₁ is formed. Furthermore, in the minimum diameter tubular portion 36a,
A third opening hole 36d is formed at a position facing the second opening hole 34g formed in the inner cylinder 34. Here, the lower end portion of the thin film elastic body 32a having the increased thickness as described above is sandwiched between the lower end tubular portion 34e of the inner cylinder 34 and the tubular end portion 36c _{1 of} the first orifice component 36. As a result, it slightly protrudes downward from the sandwiched portion while being compressed in the radial direction.

An outer cylinder 38 is fitted onto the inner cylinder 34, and the recess formed by the outer peripheral surfaces of the inclined portion 4b, the small diameter portion 34c and the annular portion 34d is surrounded by the inner peripheral surface of the outer cylinder 38. An annular space is defined in the circumferential direction. The second orifice component 40 and the second diaphragm 42 are arranged in this annular space.

That is, the outer cylinder 38 is a cylindrical member whose inner diameter is the same as the outer diameter of the inner cylinder 34 and whose axial length is the same as that of the inner cylinder 34. A thin liquid-tight sealing material 38a made of an elastic body is joined to the. Then, in the outer cylinder 38, approximately 1 of the recess is formed.
So that it is possible to face the part of / 3 from the outer peripheral side,
A slit-shaped opening 38b whose longitudinal direction extends in the circumferential direction is formed.

Further, the second diaphragm 42 is a rubber-like thin film elastic body, and as shown in FIG. 5, the second diaphragm 42 is connected to the entire circumference of the opening edge portion of the opening portion 38b to close the opening portion 38b and to close the recessed portion. It is arranged in a state of bulging toward the approximately 1/3 portion. Further, the second orifice constituting member 40 is arranged in the remaining annular space (an annular space corresponding to approximately ⅔ of the concave portion) which has become a small space due to the disposition of the second diaphragm 42. As shown in FIGS. 5 and 6, the partition wall member 40a and the passage forming member 40b are made of an elastic material.

The partition wall member 40a is provided in an annular space adjacent to one longitudinal end portion 42a of the second diaphragm 42.
The partition wall member 40a is disposed so as to be fitted between the inner cylinder 34 and the outer cylinder 38 forming the annular space, and the partition wall member 40a allows the second diaphragm 42 from the passage forming member 40b side.
Fluid flow to the side is blocked. Further, the passage forming member 40b is continuously formed in an annular space from a position close to the partition member 40a to a position close to the other end 42b in the longitudinal direction of the second diaphragm, and the one end opening 4 is formed.
0b ₃ extending along the second opening hole 34g and communication with the circumferential direction of the inner cylinder 34, the first passage 40b ₁ to the other end opening is open towards the partition wall member 40a, the first passage 40b _As a different passage on the upper part of ₁ , it extends in the circumferential direction with a length approximately twice as long as that of the first passage 40b ₁ , one end opening is open toward the partition member 40a, and the other opening 40b ₄ is the second diaphragm. Four
2 is a member having a second passage 40b ₂ opening toward the other end 42b of the second. The outer cylinder 38 is fitted inside the upper part of the device case 43.

The device case 43 has an upper end crimped portion 43a having a circular opening having a diameter smaller than the outer peripheral diameter of the inner cylinder 34 at the upper end thereof, and the shape of the case body continuous with the upper end crimped portion 43a. The inner diameter is 3
8 is a member having the same outer diameter as the outer diameter of 8 and continuing to the lower end opening (the lower end opening is shown by the broken line in FIG. 2).

Then, the outer cylinder 38 integrated with the supporting elastic body 32 and the inner cylinder 34 is fitted into the inside of the lower end opening of the apparatus case 43, and the outer cylinder 38 and the inner cylinder 38 are attached to the lower surface of the upper end caulking portion 43a. By contacting the upper end of the cylinder 34,
They are arranged in the upper part of the device case 43. Here, as shown in FIGS. 2 and 5, an air chamber 42c is defined in a portion surrounded by the inner peripheral surface of the device case 43 and the first diaphragm 32c, and is located at a position facing the air chamber 42c. An air hole 42d is formed, and the air chamber 42c communicates with the atmosphere through the air hole 42d.

Further, in the lower part of the device case 43, a leaf spring 48 integrated with the magnetic path member 46, a gap holding ring 50, an electromagnetic actuator 52, a load sensor 54,
Preload adjustment spacer 55 and vehicle body side connecting member 56
Are sequentially arranged, and after these parts are arranged, the lower end portion of the device case 43 is deformed inward in the radial direction to form the lower end caulking portion 43c as shown by the solid line in FIG. . Here, in the present embodiment, the magnetic path member 46 and the leaf spring 48 constitute a movable member.

As shown in FIG. 2, the seal ring 44 has the same outer diameter as the inner diameter of the device case 43.
This is an annular member having an inner diameter smaller than that of the lower annular portion 36c of the first orifice constituting member 36, and an O-ring 44a is formed on the lower surface thereof in a ring groove formed in a circumferential direction of a predetermined radius.
Is installed. The seal ring 44 is arranged with its upper surface in contact with the lower end of the outer cylinder 38. The leaf spring 48 is a disk member whose outer diameter is slightly smaller than the inner diameter of the device case 43, and a magnetic material made of magnetizable metal such as iron is provided at the lower center of the leaf spring 48. The road member 46 is fixed coaxially. Then, after contacting the upper peripheral portion of the leaf spring 48 with the lower surface of the seal ring 44, the leaf spring 4
The gap holding ring 5 is in contact with the lower surface peripheral portion of
0 is set. Further, the gap retaining ring 50 has an axial length from the lower surface of the leaf spring 48 to the magnetic path member 46 so that a predetermined gap is provided between the lower surface of the magnetic path member 46 and the upper surface of the electromagnetic actuator 52. The annular member is set to a value obtained by adding the dimension of the gap to the axial length to the lower surface of the.

The electromagnetic actuator 52 disposed in contact with the lower surface of the gap retaining ring 50 has a cylindrical yoke 52a and an excitation coil wound around the upper end surface of the yoke 52a with the axial direction being the vertical direction. Coil 52b
And a permanent magnet 52c whose magnetic pole is fixed in the vertical direction on the upper surface of the yoke 52a within the range surrounded by the exciting coil 52b.

At the center of the lower portion of the yoke 52a, a disk-shaped load sensor 54 is provided, and a preload adjusting spacer 55 is provided so as to surround the outer periphery of the load sensor 54. As shown in FIGS. 7 and 8, the preload adjusting spacer 55 has a notch portion at a position corresponding to a head portion of a vehicle body side mounting bolt 56a described later and a position at which the harness 54a of the load sensor 54 extends. It is a ring-shaped member in which 55a and 55b are formed. The preload adjusting spacer 55 is a member for applying a predetermined preload (a load to be applied to the load sensor in advance to set the initial value of the load sensor 54) to the load sensor 54, and is more than the reference height of the load sensor 54. The height dimension S ₁ is set to be slightly shorter.

Further, below the load sensor 54 and the preload adjusting spacer 55, there is disposed a vehicle body side connecting member 56 to which two vehicle body side mounting bolts 56a spaced apart from each other are fixed downward. This vehicle body side connecting member 56
Is a bottom lid portion 56b through which the vehicle body side mounting bolt 56a is fixed, a tubular portion 56c that rises from the outer peripheral edge portion of the bottom lid portion 56b toward the yoke 52a side, and an upper end circumferential edge of the tubular portion 56c. An annular outer edge portion 56d that extends in a radial direction outward from the harness opening portion 56e that is open at a part of the tubular portion 56c and pulls out the harness 54a to the outside.
And a member having. Here, in the present embodiment, the tubular portion 56c and the annular outer edge portion 56d form the supporting force transmitting portion of the present invention.

After the load sensor 54 and the preload adjusting spacer 55 are coaxially arranged under the yoke 52a, the vehicle body side connecting member 56 is provided so as to cover the load sensor 54 and the preload adjusting spacer 55 from below. The annular outer edge portion 56d is disposed so that the upper surface of the annular outer edge portion 56d abuts on the outer periphery of the lower surface of the yoke 52a. At this time, the harness 54 a of the load sensor 54 has the notch 5 of the preload adjustment spacer 55.
5b, harness opening 56e with grommet 57 fitted therein
Is pulled out to the outside.

When the lower end caulking portion 43c is formed at the lower end of the device case 43 so as to cover the annular outer edge portion 56d of the vehicle body side connecting member 56 from the outside, the load sensor 54 and the preload adjusting spacer 55 are attached to the device case. 43 and the vehicle body side connecting member 56. At this time, when the preload adjusting spacer 55 comes into contact with the upper surface of the vehicle body side connecting member 56 and the lower surface of the yoke 52a, the load sensor 54
A specific preload is added to.

Further, as shown in FIGS. 3 and 4, two stopper fittings 59b are fixed to the upper case caulking portion 43a of the apparatus case 43 at positions separated from each other in the circumferential direction, and the upper surfaces of these stopper fittings 59b are fixed. A bound stopper member 59a made of an elastic body having a predetermined thickness is fixed. When the engine side connecting member 30 is connected to the bracket 24 via the connecting bolt 30a, the two bound stopper members 59a face a part of the bracket. Further, the rebound restricting member 60 is fixed to the device case 43 so as to extend orthogonally to the line connecting the two connecting bolts 30a and to extend above the engine side connecting member 30 in an arch shape. The regulation member 60 includes a regulation body 60a facing the rebound stopper member 31 described above, and a pair of stopper leg portions 60b and 60c fixed to the outer periphery of the device case 43 so as to gradually lower from both ends of the regulation body 60a. Has been done.

By the way, the engine mount 20 according to the present embodiment is provided with the first orifice forming member 36 on the outer peripheral side and the first orifice forming member 36.
The inside of the orifice forming member 36 communicates with each other through the third opening hole 36d, and the inside of the first orifice forming member 26 and the first passage 40b ₁ of the second orifice forming member 40 pass through the second opening hole 34g. The second passage 4 communicates with the space where the second diaphragm 42 bulges from the first passage 40b ₁ .
It is connected via 0b ₂ .

If a portion defined by the hollow portion 32b of the support elastic body 32 and the outer peripheral surface of the upper portion of the first orifice constituting member 36 is defined as a main fluid chamber 66, the above-mentioned second diaphragm from the main fluid chamber 66 will be described. A fluid such as oil is enclosed in the communication passage up to the space where 42 swells. And
By the above-described first and second orifice component members 36 and 40 and the first and second diaphragms 32c and 42c,
Three first to third orifices 68A, 70A, 72A that generate fluid resonance when the volume of the main fluid chamber 66 changes
Also, the first to third sub-fluid chambers 68B, 70B, 72B are formed.

That is, the first orifice 68A is shown in FIG.
As shown in FIG. 5, the first sub-fluid chamber 68B is an internal space surrounded by the minimum diameter cylindrical portion 36a of the first orifice component 36 and the small diameter portion 34c of the inner cylinder 34.
It is the internal space of the first orifice component 36 near c. As shown in FIGS. 5 and 6, the second orifice 70A is a space from the first passage 40b ₁ to the position where the second diaphragm 42 bulges inward through the second passage 40b ₂ . The second sub-fluid chamber 70B is a space in which the second diaphragm 42 bulges inward. Further, as shown in FIG. 2, the third orifice 72A is a space on the inner peripheral side of the minimum diameter tubular portion 36a, and the third sub-fluid chamber 7
2B is a space from the lower end surface of the minimum diameter tubular portion 36a to the leaf spring 48. The characteristic of the fluid resonance system constituted by the first orifice 68A and the first sub-fluid chamber 68B is that the damping peak frequency (maximum damping is Frequency) is adjusted to match the frequency of idle vibration (about 20 to 30 Hz) that occurs when the vehicle is stopped. Further, the characteristics of the fluid resonance system constituted by the second orifice 70A and the second auxiliary fluid chamber 70B are adjusted so that the damping peak frequency matches the frequency of shake vibration (20 Hz or less) generated during braking. Furthermore, the characteristics of the fluid resonance system configured by the third orifice 72A and the third sub-fluid chamber 72B are as follows:
The damping peak frequency is adjusted so as to match the frequencies of muffled sound vibration and noise vibration during acceleration (80 to 800 Hz or higher) in the vehicle compartment.

The exciting coil 52b of the electromagnetic actuator 52 is connected to the controller 74 via a harness, and as shown in the block diagram of FIG. 1, a drive signal y as a drive current supplied from the controller 74.
According to the above, a predetermined electromagnetic force is generated.

The controller 74 is a microcomputer, a necessary interface circuit, an A / D converter, a D / A.
It is configured to include a converter, amplifier, etc., and when high-frequency vibration of idle vibration frequency or higher (for example, muffled sound vibration) is input, control vibration of the same cycle as the vibration is input to the engine mount. 20 so that the transmission force of the vibration to the member 28 becomes “0” (more specifically, the exciting force input to the engine mount 20 by the vibration of the engine 22 side is applied to the electromagnetic actuator 5).
The driving signal y is generated and supplied to the exciting coil 52b so as to be canceled by the control force obtained by the electromagnetic force of 2).

Here, idle vibration and muffled sound vibration are
For example, in the case of a reciprocating 4-cylinder engine, the engine rotation 2
The main cause is that the engine vibration of the next component is transmitted to the member 28 via the engine mount 20, so if the drive signal y is generated and output in synchronization with the secondary component of the engine rotation, the vibration transmission rate. Can be reduced. Therefore,
In the present embodiment, the rotation of the crankshaft of the engine 22 is synchronized (for example, in the case of a reciprocating 4-cylinder engine,
A pulse signal generator 76 is provided which generates an impulse signal and outputs it as a reference signal x each time the crankshaft rotates by 180 degrees.
Is supplied to the controller 74 as a signal indicating the generation state of the vibration.

The load sensor 54 detects the vibration state of the member 28 in the form of load and outputs it as a residual vibration signal e. The residual vibration signal e is supplied to the controller 74 as a signal representing the vibration after the interference. Has been done.
Then, the controller 74 generates and outputs the drive signal y based on the reference signal x and the residual vibration signal e according to the Filtered-X LMS algorithm which is one of the successive update adaptive algorithms. Here, in the present embodiment, the pulse signal generator 76 constitutes the reference signal generating means, the load sensor 54 constitutes the residual vibration detecting means, and the controller 74 constitutes the controlling means.

Next, the operation of the vibration isolation mechanism of this embodiment will be described. When the engine 22 starts and vibrations are input to the engine mount 20, the controller 7
4 executes a predetermined calculation process, and the electromagnetic actuator 5
The drive signal y is output to 2 to cause the engine mount 20 to generate an active control force capable of reducing vibration.

That is, the filter coefficient of the adaptive digital filter W is applied to the electromagnetic actuator 52 of the engine mount 22 from the controller 74 at a predetermined sampling clock interval from the time when the reference signal x and the residual vibration signal e are input. Are sequentially supplied as the drive signal y. As a result, a magnetic force corresponding to the drive signal y is generated in the exciting coil 52b, but since the magnetic path member 46 is already given a constant magnetic force by the permanent magnet 52c, the magnetic force by the exciting coil 52b is the permanent magnet. It can be considered to act to strengthen or weaken the magnetic force of 52c. That is, in the state where the drive signal y is not supplied to the exciting coil 52b, the magnetic path member 46 is displaced to a neutral position in which the elastic supporting force of the leaf spring 48 and the magnetic force of the permanent magnet 52c are balanced. . When the driving signal y is supplied to the exciting coil 52b in this neutral state, if the magnetic force generated in the exciting coil 52b by the driving signal y is in the opposite direction to the magnetic force of the permanent magnet 52c, the magnetic path member 4 is formed.
6 is displaced in a direction in which the clearance with the electromagnetic actuator 52 increases. On the contrary, if the magnetic force generated in the exciting coil 52b is in the same direction as the magnetic force of the permanent magnet 52c, the magnetic path member 46 is displaced in the direction in which the clearance with the electromagnetic actuator 52 decreases.

As described above, the leaf spring 48 can be displaced in both the upper and lower directions by the magnetic force generated by the electromagnetic actuator 52. If the leaf spring 48 is displaced vertically, the main fluid chamber 66 can be moved.
Of the supporting elastic body 32 due to the change in the volume of
Since the expansion direction spring is deformed, the engine mount 20 is actively supported in both forward and reverse directions. Then, each filter coefficient W ₁ of the adaptive digital filter W that becomes the drive signal y is a synchronous Filtered-X.
Since the values are sequentially updated according to the LMS algorithm, after the filter coefficients W _i of the adaptive digital filter W have converged to the optimum values after a certain amount of time has passed, the drive signal y
Is supplied to the engine mount 20, so that the member 2 is transferred from the engine 22 through the engine mount 20.
The idle vibration and muffled sound vibration transmitted to the 8 side are reduced.

Here, if the frequency of the vibration input from the engine 22 side to the engine mount 20 is near the shake vibration frequency during braking, in the present embodiment, the main fluid chamber 66 is set to the second orifice 70A. Second through
Since it is communicated with the sub-fluid chamber 70B and the resonance frequency of the fluid resonance system is made to coincide with the shake vibration frequency, when the volume of the main fluid chamber 66 changes, the main fluid chamber 66 and the second fluid chamber 66 and the second fluid flow through the second orifice 70A. Fluid resonance occurs due to fluid movement between the sub fluid chambers 70B. As a result, a high damping force can be applied to the shake vibration, and a good vibration damping effect can be obtained.

When the frequency of the vibration input from the engine 22 side to the engine mount 20 becomes close to the idle vibration frequency when the vehicle is stopped, the second orifice is generated even if the volume of the main fluid chamber 66 changes at that frequency. Since the fluid in 70A cannot follow the idle vibration frequency and is in a stick state, the fluid does not move between the main fluid chamber 66 and the second auxiliary fluid chamber 70B via the second orifice 70A. Therefore, the volume fluctuation in the main fluid chamber 66 is transmitted to the first sub fluid chamber 68B via the first orifice 68A. Since the resonance frequency of this fluid resonance system matches the idle vibration frequency, the main flow Even if the volume of the body chamber 66 changes periodically at that frequency, the fluid in the first orifice 68A does not become a stick state, and the main flow occurs via the first orifice 68A to which the pressure change in the main fluid chamber 66 directly acts. The fluid moves between the body chamber 66 and the first sub-fluid chamber 68B. As a result, fluid resonance occurs between the main fluid chamber 66 and the second sub fluid chamber 68B through the first orifice 68A, so that a larger control force can be generated by the same electromagnetic actuator 52. In particular, the control vibration having a large amplitude can be superimposed on the idle vibration having a large amplitude generated on the engine 22 side, and a good vibration damping effect can be obtained.

Further, when the frequency of vibration input from the engine 22 side to the engine mount 20 becomes close to the frequencies of muffled sound vibration and noise vibration during acceleration, even if the volume of the main fluid chamber 66 changes at that frequency. First orifice 68
Since the fluid in A cannot follow the muffled sound vibration frequency and is in a stick state, the fluid does not move between the main fluid chamber 66 and the second auxiliary fluid chamber 68B via the first orifice 68A. Therefore, the volume variation in the main fluid chamber 66 is caused by the third auxiliary fluid chamber 72B via the third orifice 72A.
However, since the resonance frequency of this fluid resonance system matches the frequencies of muffled sound vibration and noise vibration during acceleration, even if the volume of the main fluid chamber 66 changes periodically at that frequency, The fluid in the orifice 72A does not become a stick state, and when the volume of the main fluid chamber 66 changes, the main fluid chamber 66 and the third sub-fluid chamber 72B pass through the third orifice 72A.
Fluid resonance occurs between the same electromagnetic actuator 52
Can generate a greater control force.

Next, the operation of the load sensor 54 and the preload adjusting spacer 55 built in the engine mount 20 will be described. Since the load sensor 54 detects the vibration state of the member 28 side in the form of load and inputs it as the residual vibration signal e to the controller 74, it is necessary to detect the running noise of the vehicle as the vibration state of the member 28 like an acceleration sensor. Therefore, residual vibration on the member 28 side can be accurately detected, and highly accurate active control can be performed.

Further, the load sensor 54 is built in the engine mount 20 while being surrounded by the vehicle body side connecting member 56, and is installed at a position where environmental conditions are favorable, so that the sensor is excellent in durability and safety. Become.

Further, the supporting force of the engine 22 depends on the yoke 5
The annular outer edge portion 56d, which is in contact with the lower surface of 2a, the tubular portion 56
The supporting force of the engine 22 is not input to the load sensor 54 arranged in parallel with the annular outer edge portion 56d and the cylindrical portion 56c, which is configured to be transmitted to the member 28 side via c, so that the load range is low. Set small load sensor 5
4 can be used.

Since the preload adjusting spacer 55 is built in together with the load sensor 54, the lower end caulking portion 43c is formed at the lower end portion of the device case 43 to cover the annular outer edge portion 56d of the vehicle body side connecting member 56 from the outside. Since the preload adjusting spacer 55 automatically adds a predetermined preload to the load sensor 54,
The initial adjustment of 4 can be performed easily and with high accuracy.

Next, FIG. 9 shows a second embodiment of the present invention. The same components as those of the structure shown in FIGS. 2 to 8 are designated by the same reference numerals and the description thereof will be omitted.
In the present embodiment, the notch portion 5 is provided on the outer peripheral side of the lower portion of the yoke 52a at a position corresponding to the head of the vehicle body side mounting bolt 56a.
2a ₁ is formed, and the load sensor 54
A storage hole 80 capable of storing the inside is formed. Then, from the opening of the storage hole 80 to the hole bottom surface 80
The depth up to a is set to a dimension S ₁ that allows a predetermined preload to be applied to the load sensor 54, similar to the height of the preload adjusting spacer 55 of the first embodiment.

As a result, the load sensor 5 is accommodated in the storage hole 80.
4 is arranged and the vehicle body side connecting member 56 is arranged so as to cover the load sensor 54 from below, when the load sensor 54 contacts the vehicle body side connecting member 56 and the hole bottom surface 80a,
A predetermined preload is applied to the load sensor 54, and the initial adjustment work of the preload of the load sensor 54 can be easily performed with high accuracy.

Other operational effects are the same as those of the first embodiment except the operational effect obtained by using the preload adjusting spacer 55. In addition, although the said embodiment shows the case where the anti-vibration support apparatus which concerns on this invention is applied to the engine mount 20 which supports the engine 22, the application object of the anti-vibration support apparatus which concerns on this invention is an engine mount 20. However, the present invention is not limited to this, and may be, for example, a vibration isolation support device for a machine tool accompanied by vibration.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an arrangement state of a vibration isolation support device according to the present invention.

FIG. 2 is a view showing a cross section taken along the axial direction of the vibration isolating support device of the first embodiment according to the present invention.

FIG. 3 is a plan view of the anti-vibration support device.

FIG. 4 is a diagram showing the anti-vibration support device in a side view.

FIG. 5 is a view showing a cross section of a vibration isolation support device cut in a direction orthogonal to the axial direction.

FIG. 6 is a perspective view showing a main part of a second orifice constituent member which is a constituent member of the vibration-damping support device.

FIG. 7 is a diagram showing an arrangement position of a load sensor and a preload adjusting spacer according to the present invention.

FIG. 8 is a perspective view showing a preload adjusting spacer according to the present invention.

FIG. 9 is a view showing a cross section of a main part along an axial direction of a vibration isolating support device of a second embodiment according to the present invention.

[Explanation of symbols]

20 engine mount (anti-vibration support device) 22 engine (vibration body) 28 member (support body) 32 support elastic body 43 device case 46 magnetic path member (movable member) 48 leaf spring (movable member) 52 electromagnetic actuator (actuator, first) 1 component) 54 load sensor (residual vibration detecting means) 55 preload adjusting spacer 56 vehicle body side connecting member (supporting member connecting member) 56c tubular portion (cylindrical supporting force transmitting portion) 66 main fluid chamber (fluid chamber) 68A No. 1 Orifice (fluid chamber) 68B 1st sub-fluid chamber (fluid chamber) 70A 2nd orifice (fluid chamber) 70B 2nd sub-fluid chamber (fluid chamber) 72A 3rd orifice (fluid chamber) 72B 3rd sub-fluid chamber (fluid) Chamber) 76 pulse signal generator (reference signal generating means) 74 controller (control means) 80 storage hole 80a hole bottom

Front Page Continuation (72) Inventor Takahisa Hiraide 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. (56) Reference JP-A-7-233852 (JP, A) JP-A-7-248041 ( JP, A) JP 6-294434 (JP, A) JP 4-145241 (JP, A) JP 7-223444 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16F 13/26

Claims (4)

(57) [Claims] 1. A vibrating body that periodically oscillates and a supporting elastic body interposed between supporting bodies that support the vibrating body, a fluid chamber defined by the supporting elastic body and having a fluid enclosed therein, and the fluid. A movable member that forms a part of a partition wall of the chamber and is displaceable in a direction that changes the volume of the fluid chamber; an actuator that can generate a displacement force that displaces the movable member in the direction; Reference signal generating means for detecting a generation state of vibration in the body and generating a reference signal, residual vibration detecting means for detecting residual vibration on the side of the support and outputting it as a residual vibration signal, the residual vibration signal and the reference signal And a control means for outputting a drive signal to the actuator based on the control means for generating the displacement force in the actuator. The residual vibration of the support side and the load sensor for detecting a form of the load, in a cylindrical device case axis faces the vibrator support direction, before
The support elastic body, the movable member, the actuator, etc.
Place the parts on the same axis, and place the parts closest to the support in this equipment case.
Coaxial with the load sensor adjacent to the first part located at
The load sensor and opens from the load sensor to the support side.
Closing the opening of the device case with a lid-like support connecting member
The load sensor is placed inside and the device case and
And the outer edge portions of the support connecting member are fixed to each other, and the support side connecting member is fixed to the load sensor.
Fix it to the device case while pressing it toward the first part.
Between the support-side connecting member and the first component
Preload is applied to the load sensor placed in
The anti-vibration support device characterized in that 2. A vibrating body that generates periodic vibrations and a vibrating body
The support elastic body interposed between the supports to be supported and the support elastic
A fluid chamber defined by a body and containing a fluid inside
And forming part of the partition wall of the fluid chamber and
A movable member that can be displaced in the direction that changes the volume
It is possible to generate a displacement force that displaces the moving member in the direction.
Possible actuators and the generation of vibrations in the vibrating body.
Reference signal generating means for detecting a raw state and generating a reference signal
And the residual vibration on the side of the support is detected and used as a residual vibration signal.
Residual vibration detection means for outputting the residual vibration signal and the residual vibration signal and
Drive signal to the actuator based on the previous SL reference signal
To generate the displacement force in the actuator.
In the anti-vibration support device including a control means, the residual vibration detection means is configured to load the residual vibration on the support side.
And a load sensor for detecting heavy form, a cylindrical device case axis faces the vibrator support direction, before
The support elastic body, the movable member, the actuator, etc.
Place the parts on the same axis, and place the parts closest to the support in this equipment case.
Coaxial with the load sensor adjacent to the first part located at
The load sensor and opens from the load sensor to the support side.
Closing the opening of the device case with a lid-like support connecting member
The load sensor is placed inside and the device case and
And the outer edge portions of the support connecting member are fixed to each other, and the outer edge portion of the support connecting portion is transmitted from the first component.
The supporting force of the vibrating body transmitted to the supporting body side,
The load sensor and the vibrating body support direction are not in parallel.
Forming a cylindrical supporting force transmitting portion, and connecting the supporting member side connecting member to the load sensor.
Fix it to the device case while pressing it toward the first part.
Between the support-side connecting member and the first component
Preload is applied to the load sensor placed in
An anti-vibration support device characterized in that 3. The support-side connecting member and the first component
Between the load sensor and the
The preload adjustment spacer in the axial direction.
Both end faces of the support-side connecting member and the first component
A predetermined preload is applied to the load sensor when
The vibration proof according to claim 1 or 2, characterized in that
Support device. 4. The first component facing the support body side.
Form a concave storage hole to open and store the load sensor.
From the opening of this storage hole to the bottom of the hole.
The depth dimension in the axial direction is calculated by the load cell stored in this storage hole.
Sensor is pushed to the bottom side of the hole by the support side connecting member.
The dimensions are set so that a certain preload is applied by being pressed.
The anti-vibration support device according to claim 1 or 2.