JPH10339342A - Vibration isolating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease swiveling of a vibration generating part by increasing a spring constant in an axial direction. SOLUTION: In a vibration isolating device, in a plurality of parts along a peripheral direction in an internal peripheral surface of an outer cylinder metal fixture 12, an adjusting plate 22 with its obverse/reverse 22A facing to an axial direction of the outer cylinder metal fixture 12 is set up. In the internal peripheral surface of the outer cylinder metal fixture 12, a rubber-made elastic unit 16 deformed when a vibration is generated is bonded to be vulcanized. In a central part of this elastic unit 16, an inner cylinder metal fixture 14 extended in parallel to an axial line of the outer cylinder metal fixture 12 is arranged, the elastic unit 16 is bonded to be vulcanized to a peripheral surface of the inner cylinder metal fixture 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a general industrial machine,
The present invention relates to an anti-vibration device used for an engine mount or the like of an automobile.

[0002]

2. Description of the Related Art Conventionally, there has been known an anti-vibration device provided as an engine mount between an engine of an automobile and a vehicle body. 16 and 17 have been proposed as one type of this vibration isolator, and the prior art will be described below with reference to these drawings.

As shown in FIGS. 16 and 17, between an inner cylinder 102 and an outer cylinder 104 of an anti-vibration device 100, an elastic body which is a main rubber vulcanized and bonded to the inner cylinder 102 and the outer cylinder 104. 106 are passed over.

[0004] The vibration isolator 100 is used, for example, by connecting the inner cylinder 102 to an automobile engine, which is a vibration generator, and connecting the outer cylinder 104 to the vehicle body.
Here, when the vibration of the engine is input to the vibration isolator 100 and the inner cylinder 102 and the outer cylinder 104 are relatively displaced in the radial direction up and down (P direction in FIG. 16), a damping force is generated.

[0005]

However, in the vibration isolator 100 as described above, the spring constant in the axial direction (R direction in FIG. 17) of the vibration isolator 100 is lower than the spring constant in the vertical direction. There is a problem that swinging along the axial direction of the engine which is the same direction as the axial direction of the vibration isolator 100 becomes too large.

The present invention has been made in view of the above circumstances, and has as its object to provide an anti-vibration device that can increase the axial spring constant and reduce the oscillation of the vibration generating unit.

[0007]

According to a first aspect of the present invention, there is provided an anti-vibration apparatus comprising: an outer cylinder connected to one of a vibration generator and a vibration receiver; and a vibration generator arranged on an inner peripheral side of the outer cylinder. An inner cylinder connected to the other of the vibration receiving portion, an elastic body provided between the inner cylinder and the outer cylinder, connecting the inner cylinder and the outer cylinder, and deforming when vibration occurs, and an axial direction of the outer cylinder. And an adjustment plate installed on the inner peripheral surface of the outer cylinder with the front and back faces turned.

According to a second aspect of the present invention, the adjusting plate is provided at a plurality of positions along the circumferential direction of the inner peripheral surface of the outer cylinder.

According to a third aspect of the present invention, there is provided the vibration isolator, wherein the outer cylinder is connected to one of the vibration generating section and the vibration receiving section, and the other of the vibration generating section and the vibration receiving section is disposed on the inner peripheral side of the outer cylinder. The inner cylinder connected to the inner cylinder, the elastic body that is provided between the inner cylinder and the outer cylinder, connects the inner cylinder and the outer cylinder, and is deformed when vibration occurs, and the front and back faces are oriented in the axial direction of the inner cylinder. And an adjusting plate installed on the outer peripheral surface of the inner cylinder.

According to a fourth aspect of the present invention, the vibration control device is characterized in that adjustment plates are respectively installed at a plurality of locations along the circumferential direction of the outer peripheral surface of the inner cylinder.

The operation of the vibration isolator according to claim 1 will be described below. When the vibration is transmitted from the vibration generating section to the inner cylinder or the outer cylinder, the elastic body that is the main rubber is deformed. Because of this,
The vibration is attenuated by the deformation of the elastic body, and the vibration is hardly transmitted to the vibration receiving portion connected to the outer cylinder or the inner cylinder. In addition, an adjustment plate is provided on the inner peripheral surface of the outer cylinder while the front and back faces are oriented in the axial direction of the outer cylinder.

Therefore, when the inner cylinder moves along its radial direction, the adjusting plate is arranged in parallel to the deformation direction of the elastic body deformed along with the inner cylinder. As a result, the elastic body has a shape that undergoes shear deformation. Therefore, the spring constant in the radial direction of the inner cylinder is slightly increased as compared with the conventional vibration isolator.

On the other hand, when the inner cylinder moves along its axial direction,
Since the adjusting plate is arranged orthogonally to the deformation direction of the elastic body deformed with the inner cylinder, the elastic body is deformed on the front and back surfaces of the adjusting plate. Therefore, compression and pulling force will act on the elastic body by the adjustment plate,
The spring constant in the axial direction of the inner cylinder is greatly increased as compared with the conventional vibration isolator.

As described above, since the front and back surfaces are oriented in the axial direction of the outer cylinder and the adjusting plate is installed on the inner peripheral surface of the outer cylinder, the spring constant of the vibration isolator in the axial direction of the inner cylinder is set. , And as a result, the swing of the vibration generating portion can be reduced.

The operation of the vibration isolator according to claim 2 will be described below. The vibration isolator according to the present invention has the same function as that of the first embodiment. However, the present invention is configured such that the adjusting plates are respectively installed at a plurality of locations along the circumferential direction of the inner peripheral surface of the outer cylinder. Therefore, since a plurality of adjusting plates are provided, the axial constant of the vibration isolator is further increased.

The operation of the vibration isolator according to claim 3 will be described below. The present invention has substantially the same configuration as the first embodiment. However, an adjustment plate is installed on the outer peripheral surface of the inner cylinder while the front and back faces are oriented in the axial direction of the inner cylinder. Therefore, by providing the adjusting plate on the outer peripheral surface of the inner cylinder with the front and back faces oriented in the axial direction of the inner cylinder, the spring constant in the axial direction of the vibration isolator is increased, as in the first embodiment. The swing of the vibration generating section can be reduced.

The operation of the vibration isolator according to claim 4 will be described below. The vibration isolator according to the present invention has the same function as that of the third embodiment. However, the present invention is configured such that the adjusting plates are respectively installed at a plurality of positions along the circumferential direction of the outer peripheral surface of the inner cylinder. Therefore, since a plurality of adjusting plates are provided, the axial constant of the vibration isolator is further increased.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 3 show a vibration isolator according to a first embodiment of the present invention, and the present embodiment will be described with reference to these drawings.

As shown in FIGS. 1 to 3, the outer frame of the vibration isolator 10 according to the present embodiment is constituted by an outer tube fitting 12 in which a steel plate is formed in a cylindrical shape. At a plurality of locations along the circumferential direction of the inner peripheral surface of the outer cylinder fitting 12, steel adjustment plates 22 whose front and back surfaces 22A are oriented in the axial direction (R direction in FIG. 2) of the outer cylinder fitting 12 are provided. Each is installed. That is, two adjustment plates 22 are welded side by side to the inner peripheral surface of the outer cylinder fitting 12 at the lower left and right positions in FIG.

An elastic body 16 made of rubber, which is deformed when vibration occurs, is vulcanized and bonded to the inner peripheral surface of the outer cylinder fitting 12 including the portion where the adjustment plate 22 is installed. This elastic body 16
A steel inner cylinder fitting 14 extending parallel to the axis of the outer cylinder fitting 12 is disposed at the center of the inner cylinder fitting 1.
4 is bonded to the outer peripheral surface by vulcanization. Therefore, the adjustment plate 22
The elastic body 16 is provided between the inner cylinder 14 and the outer cylinder 12 in a state in which is embedded, and connects the inner cylinder 14 and the outer cylinder 12. That is, the outer tube fitting 12
The compressible elastic body 16 is present adjacent to at least one side of the adjustment plate 22 along the axial direction of.

The axis of the inner cylinder 14 is the elastic body 1
In a state where no load is acting on 6 (the state shown in FIG. 1), it is located slightly above the axis of the outer cylinder fitting 12. However,
The inner cylinder fitting 14 and the outer cylinder fitting 12 may be arranged coaxially.

An elastic body 16 is provided between the outer tube 12 and the inner tube 14 and above the inner tube 14.
Is formed in the upper space portion 18 that penetrates in the axial direction.
Between the outer cylinder fitting 12 and the inner cylinder fitting 14 and the inner cylinder fitting 1
A lower gap portion 20 penetrating the elastic body 16 in the axial direction is formed below the elastic body 4 to facilitate the deformation of the elastic body 16 in the vertical direction in FIG. It should be noted that no adjustment plate is disposed in the upper gap 18 and the lower gap 20.

Further, the vibration isolator 10 is inserted and fixed to a mounting frame (not shown) for mounting the vehicle body. When this mounting frame is attached to the vehicle body and the inner cylinder 14 is connected to the engine by bolts or the like, the load of the engine is reduced to the inner cylinder 14, the elastic body 16, the outer cylinder 1
2. It is supported by the vehicle body via the mounting frame. When a load of the engine is applied to the elastic body 16, the elastic body 16 is deformed,
The axis of the inner cylinder 14 substantially coincides with the axis of the outer cylinder 12.

Next, the operation of the present embodiment will be described. When vibration is transmitted from the engine side to the inner cylinder fitting 14, the elastic body 16 is deformed. For this reason, the vibration is attenuated by the deformation of the elastic body 16, and it is difficult for the vibration to be transmitted to the vehicle body connected to the outer cylinder fitting 12. The adjustment plate 22 is provided on the inner peripheral surface of the outer cylinder 12 while the front and back surfaces 22A are directed in the axial direction of the outer cylinder 12 and the inner cylinder 14 arranged in parallel with the outer cylinder 12. .

Therefore, the inner tube fitting 14 is moved in the radial direction (FIG. 1).
When moving along the upper and lower directions (P direction), the adjustment plate 22 is arranged in parallel to the deformation direction of the elastic body 16 that is deformed along with the inner cylinder fitting 14. For this reason, the elastic body 16 is subjected to shear deformation with respect to the adjustment plate 22, and the rise in the radial spring constant of the inner cylinder 14 is smaller than that of the conventional vibration isolator shown in FIGS. It will be slight.

On the other hand, the inner tube fitting 14 is moved in the axial direction (FIG. 2).
When moving along the upper (R direction), the adjusting plate 22 is arranged orthogonal to the deformation direction of the elastic body 16 deformed along with the inner cylindrical fitting 14. For this reason, the elastic body 16
Is received on the front and back surfaces 22A of the adjustment plate 22,
The adjusting plate 22 exerts compressive and tensile forces on the elastic body 16. As a result, the spring constant in the axial direction of the inner cylinder fitting 14 is greatly increased as compared with the conventional vibration isolator.

As described above, the front and rear surfaces 22 A are oriented in the axial direction of the outer cylinder fitting 12, and the adjustment plate 22 is formed on the inner peripheral surface of the outer cylinder fitting 12.
Is installed, the spring constant in the axial direction of the vibration isolator 10 that is the axial direction of the inner cylinder fitting 14 is increased, and the spring constant in the axial direction with respect to the spring constant in the radial direction can be increased. As a result, the swing of the vibration isolator 10 along the axial direction can be reduced.

Further, in the present embodiment, the outer tube fitting 12
Since the adjusting plates 22 are respectively installed at a plurality of positions along the circumferential direction of the inner peripheral surface of the vibration control device 10, the spring constant of the vibration isolator 10 in the axial direction is further increased.

Next, a vibration isolator according to a second embodiment of the present invention is shown in FIGS. 4 and 5, and this embodiment will be described with reference to these drawings. The same members as those described in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIGS. 4 and 5, the vibration isolator 10 according to the present embodiment does not include the adjustment plate 22 installed on the inner peripheral surface of the outer cylinder fitting 12, At a plurality of locations along the circumferential direction of the outer peripheral surface, adjustment plates 24 whose front and rear surfaces 24A are directed in the axial direction of the inner cylindrical fitting 14 are respectively installed. That is, the adjusting plates 24 are respectively welded and installed on the outer peripheral surface of the inner cylindrical fitting 14 so as to protrude toward the lower left and right sides in FIG.

Next, the operation of the present embodiment will be described. In the present embodiment, the vibration is attenuated from the engine side in the same manner as in the first embodiment, and it is difficult for the vibration to be transmitted to the vehicle body side. An adjustment plate 24 is provided on the outer peripheral surface of the inner cylinder 14 with the front and back surfaces 24A oriented in the axial direction of the inner cylinder 14.

For this reason, as in the first embodiment, when the inner cylinder 14 moves along its radial direction (P direction in FIG. 4), the elastic body 16 deformed with the inner cylinder 14. The adjusting plate 24 is arranged in parallel to the deformation direction of. For this reason, the elastic body 16 is subjected to a shearing deformation with respect to the adjustment plate 24, and the rise of the spring constant in the radial direction of the inner cylinder 14 is smaller than that of the conventional vibration isolator shown in FIGS. It will be slight.

On the other hand, the inner tube fitting 14 is moved in the axial direction (FIG. 5).
When moving along the upper (R direction), the adjustment plate 24 is arranged orthogonal to the deformation direction of the elastic body 16 deformed along with the inner cylinder fitting 14. For this reason, the elastic body 16
Is received on the front and back surfaces 24A of the adjustment plate 24,
The adjusting plate 24 exerts a compressive and tensile force on the elastic body 16. As a result, the spring constant in the axial direction of the inner cylinder fitting 14 is greatly increased as compared with the conventional vibration isolator.

As described above, the front and back surfaces 24A are oriented in the axial direction of the inner cylindrical member 14, and the adjusting plate 24 is formed on the outer peripheral surface of the inner cylindrical member 14.
Is installed, the spring constant in the axial direction of the vibration isolator 10 is increased, and the spring constant in the axial direction with respect to the spring constant in the radial direction can be increased. As a result, the axial direction of the vibration isolator 10 can be increased. Swing along the axis can be reduced.

Further, in the present embodiment, the inner tube fitting 14
Since the adjusting plates 24 are respectively installed at a plurality of locations along the circumferential direction of the outer peripheral surface of the device, the spring constant in the axial direction of the vibration isolator 10 is further increased, and the right and left balance of the spring constant is improved. .

Next, FIGS. 6 and 7 show a vibration isolator according to a third embodiment of the present invention, and the present embodiment will be described with reference to these drawings. The same members as those described in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIGS. 6 and 7, the vibration isolator 10 according to the present embodiment includes the adjusting plate 2 of the first embodiment.
The structure is such that the adjustment plates 24 of the second and second embodiments are respectively provided.

That is, the inner peripheral surface of the outer cylinder fitting 12 is shown in FIG.
As shown in FIG.
The two adjustment plates 22 are welded and installed side by side. Adjustment plates 24 are welded to the outer peripheral surface of the inner tube fitting 14 so as to project toward the lower left and right sides in FIG.

As described above, the present embodiment has an operation similar to the combination of the first embodiment and the second embodiment.

Next, FIGS. 8 to 10 show a vibration isolator according to a fourth embodiment of the present invention, and the present embodiment will be described with reference to these drawings. The same members as those described in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIGS. 8 to 10, in the vibration isolator 10 according to the present embodiment, similarly to the first embodiment, an adjusting plate 22 is provided on the inner peripheral surface of the outer tube fitting 12. Have been. However, in the present embodiment, as shown in FIG. 10, the adjustment plate pieces 32 having a U-shaped cross section are welded to the inner peripheral surface of the outer cylinder fitting 12 so that the two adjustment plates 2 are formed.
2 is installed on the inner peripheral surface of the outer cylinder fitting 12.

Therefore, the present embodiment also provides the same operation as the first embodiment, but furthermore, the two adjustment plates 22 are integrally welded to enhance the assemblability of the vibration isolator. become.

Next, a vibration damping device according to a fifth embodiment of the present invention is shown in FIGS. 11 and 12, and this embodiment will be described with reference to these drawings. The same members as those described in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIGS. 11 and 12, in the vibration isolator 10 according to the present embodiment, an adjustment plate 22 is provided on the inner peripheral surface of the outer tube fitting 12, as in the first embodiment. Have been. However, in the present embodiment, necessary portions at both ends of the outer cylinder fitting 12 are formed to project in advance, and the outer cylinder fitting 12 is formed.
The both ends of this are bent inward to form the adjustment plate 22.

Therefore, the present embodiment also provides the same operation as the first embodiment, but furthermore, welding is unnecessary by bending the outer tube fitting 12 to form the adjusting plate 22 instead of welding. As a result, the assemblability of the vibration isolator is improved.

Next, FIG. 13 shows a vibration isolator according to a sixth embodiment of the present invention, and this embodiment will be described with reference to FIG. The same members as those described in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIG. 13, in the vibration isolator 10 according to the present embodiment, an adjustment plate 22 is provided on the inner peripheral surface of the outer tube fitting 12 as in the first embodiment. . However,
In the present embodiment, the adjusting plate 22 is formed by partially cutting out and bending the middle part of the outer tube fitting 12 in the axial direction.

Therefore, the present embodiment has the same effect as the first embodiment, but the assembling property of the vibration isolator is improved by the amount that welding is not required.

Next, a vibration isolator according to a seventh embodiment of the present invention is shown in FIG. 14, and the present embodiment will be described with reference to FIG. The same members as those described in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIG. 14, in the vibration isolator 10 according to the present embodiment, an adjustment plate 22 is provided on the inner peripheral surface of the outer tube fitting 12 as in the first embodiment. . However,
In the present embodiment, the outer cylinder 12 is made of synthetic resin or aluminum which is injected into a mold and molded, and the adjustment plate 22 is integrally formed on the outer cylinder 12 by the mold. It is. For this reason, in the present embodiment, it is not necessary to weld or bend the adjustment plate 22, and the assemblability of the vibration isolator is improved.

Next, a vibration isolator according to an eighth embodiment of the present invention is shown in FIG. 15, and the present embodiment will be described with reference to FIG. The same members as those described in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIG. 15, a cylindrical intermediate cylinder 34 is embedded in the elastic body 16 between the outer cylinder 12 and the inner cylinder 14 of the vibration isolator 10 according to the present embodiment. In this state, the outer cylinder 12 and the inner cylinder 14 are arranged coaxially. An adjusting plate 3 is provided on the inner and outer peripheral surfaces of the intermediate cylinder 34 so as to project from the intermediate cylinder 34, respectively.
6, 38 are arranged.

Therefore, the vibration damping device 10 of the present embodiment has the same operation as that of the first embodiment due to the adjustment plates 36 and 38.

In the above embodiment, the outer cylinder 1
Although two adjustment plates 22 are arranged side by side on the inner peripheral surface of No. 2, one adjustment plate 22 may be installed at the center of the inner peripheral surface of the outer cylinder fitting 12. In addition, although one adjustment plate 24 is provided on the outer peripheral surface of the inner cylinder 14, two adjustment plates 24 may be arranged side by side on the outer surface of the inner cylinder 14.

In the above embodiment, the description has been made of the vibration isolator having no liquid chamber. However, it goes without saying that the present invention can be applied to a vibration isolator having one or a plurality of liquid chambers. Further, in the above embodiment, the outer cylinder is connected to the vehicle body serving as the vibration receiving unit, and the inner cylinder is connected to the engine side serving as the vibration generating unit. However, the reverse configuration may be adopted.

On the other hand, in the embodiment, the purpose is to dampen an engine mounted on an automobile. However, the anti-vibration device of the present invention is used for, for example, a body mount of an automobile or other uses other than an automobile. Needless to say.

[0057]

As described above, the vibration isolator of the present invention has an excellent effect that the spring constant in the axial direction can be increased to reduce the oscillation of the vibration generator.

[Brief description of the drawings]

FIG. 1 is a front view of a vibration isolator according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of the vibration isolator shown in FIG.

FIG. 3 is a sectional view taken along line 3-3 of the vibration isolator shown in FIG.

FIG. 4 is a front view of a vibration isolator according to a second embodiment of the present invention.

FIG. 5 is a sectional view taken along line 5-5 of the vibration isolator shown in FIG.

FIG. 6 is a front view of a vibration isolator according to a third embodiment of the present invention.

FIG. 7 is a sectional view taken along line 7-7 of the vibration isolator shown in FIG.

FIG. 8 is a front view of a vibration isolator according to a fourth embodiment of the present invention.

FIG. 9 is a sectional view taken along line 9-9 of the vibration isolator shown in FIG.

FIG. 10 is a perspective view of an outer metal fitting applied to a vibration isolator according to a fourth embodiment of the present invention.

FIG. 11 is a front partial cross-sectional view of a vibration isolator according to a fifth embodiment of the present invention.

FIG. 12 is a sectional view taken along line 12-12 of the vibration isolator shown in FIG.

FIG. 13 is a sectional view of a vibration isolator according to a sixth embodiment of the present invention.

FIG. 14 is a sectional view of a vibration isolator according to a seventh embodiment of the present invention.

FIG. 15 is a sectional view of a vibration isolator according to an eighth embodiment of the present invention.

FIG. 16 is a front view of a conventional vibration isolator.

17 is a sectional view taken along line 17-17 of the vibration isolator shown in FIG. 16;

[Description of Signs] 10 Anti-vibration device 12 Outer tube fitting 14 Inner tube fitting 16 Elastic body 22 Adjusting plate 24 Adjusting plate 36 Adjusting plate 38 Adjusting plate

Claims (4)

[Claims] An outer cylinder connected to one of the vibration generator and the vibration receiver; an inner cylinder disposed on the inner peripheral side of the outer cylinder and connected to the other of the vibration generator and the vibration receiver; An elastic body that is provided between the cylinder and the outer cylinder, connects the inner cylinder and the outer cylinder, and deforms when vibration occurs. Installed on the inner peripheral surface of the outer cylinder with the front and back facing in the axial direction of the outer cylinder An adjustment plate, comprising: a vibration control device; 2. An anti-vibration device according to claim 1, wherein said adjusting plates are provided at a plurality of positions along a circumferential direction of an inner peripheral surface of said outer cylinder. 3. An outer cylinder connected to one of the vibration generator and the vibration receiver, and an inner cylinder disposed on the inner peripheral side of the outer cylinder and connected to the other of the vibration generator and the vibration receiver. An elastic body that is provided between the cylinder and the outer cylinder, connects the inner cylinder and the outer cylinder, and is deformed when vibration occurs. The elastic body is installed on the outer peripheral surface of the inner cylinder while the front and back faces are oriented in the axial direction of the inner cylinder. And an adjusting plate. 4. An anti-vibration device according to claim 3, wherein said adjusting plates are provided at a plurality of positions along a circumferential direction of an outer peripheral surface of said inner cylinder.