JP2016075359A - Vibration control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure.SOLUTION: An elastic body 13 extends from a second mounting component 12 toward both sides of a first orthogonal direction D1, in a first longitudinal sectional view along both directions of the first orthogonal direction D1 and an axial direction O. In the elastic body 13, a first external surface 33, which is located on one side of the axial direction O in one side part 31 located on one side of the first orthogonal direction D1 with respect to the second mounting component 12, sinks in the axial direction O or extends linearly in the first longitudinal sectional view. In the elastic body 13, a second internal surface 36, which is located on the other side of the axial direction O in an other side part 32 located on the other side of the first orthogonal direction D1 with respect to the second mounting component 12, sinks in the axial direction O in the first longitudinal sectional view. Further, a first internal surface 34 located on the other side of the axial direction O in one side part 31 of the elastic body 13, and a second external surface 35 located on one side of the axial direction O in the other side part 32 of the elastic body 13, protrude in the axial direction O or extend linearly in the first longitudinal sectional view.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vibration isolator that is applied to, for example, automobiles and industrial machines and absorbs and attenuates vibrations of a vibration generating unit such as an engine.

  Conventionally, a vibration isolator described in Patent Document 1 below is known. The vibration isolator includes a first attachment member attached to either the vibration generating side or the vibration receiving side, and a second attachment member attached to either one of the sides and surrounding the first attachment member in a substantially cylindrical shape. And an elastic partition wall for connecting the first and second mounting members. In this vibration isolator, the inside is divided into a plurality of liquid chambers by elastic partition walls, and the liquid chambers are connected by an orifice passage. In this vibration isolator, three pairs of liquid chambers are provided, and three kinds of orifice passages are provided by communicating between the pair of liquid chambers with an orifice passage.

JP 2002-310219 A

  However, the conventional vibration isolator has room for improvement in the simplification of the structure.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to simplify the structure.

In order to solve the above problems, the present invention proposes the following means.
The vibration isolator according to the present invention includes a cylindrical first attachment member connected to one of the vibration generating portion and the vibration receiving portion, a second attachment member connected to the other, and both of these attachment members. An elastic body to be connected, and a liquid chamber in the first mounting member in which a liquid is sealed, the main liquid is located on one side along the axial direction of the first mounting member while using the elastic body as a part of the wall surface A partition member that partitions the chamber, a secondary liquid chamber located on the other side along the axial direction, and a restricting passage that communicates the main liquid chamber and the secondary liquid chamber, and the elastic body includes: In the first orthogonal direction perpendicular to the axial direction and in the first longitudinal sectional view along both the axial direction, the elastic body extends from the second mounting member toward both sides in the first orthogonal direction. , One of the first orthogonal directions relative to the second mounting member. The first outer surface located on one side in the axial direction among the one side portions located on the side is recessed in the axial direction or extends linearly in the first longitudinal sectional view. In the elastic body, Of the other side portion located on the other side in the first orthogonal direction with respect to the second mounting member, a second inner surface located on the other side in the axial direction is recessed in the axial direction in the first longitudinal sectional view. The first inner surface located on the other side in the axial direction of the one side portion of the elastic body, and the second outer surface located on the one side in the axial direction of the other side portion of the elastic body are In the first longitudinal sectional view, it protrudes in the axial direction or extends linearly.

  In this case, when the vibration in the axial direction is input from the vibration generating unit, the first mounting member and the second mounting member are relatively displaced in the axial direction. At this time, the elastic body elastically deforms in the axial direction and the main liquid chamber expands / contracts, so that the liquid flows through the restriction passage between the main liquid chamber and the sub liquid chamber to generate resonance, and the vibration is absorbed and absorbed. Attenuated.

  Further, when vibration in the first orthogonal direction is input from the vibration generating portion, the first attachment member and the second attachment member are relatively displaced in the first orthogonal direction, and the second attachment member becomes the first attachment member. On the other hand, it moves toward one side in the first orthogonal direction, or moves toward the other side in the first orthogonal direction.

When the second mounting member moves toward one side in the first orthogonal direction with respect to the first mounting member, the one side portion and the other side portion of the elastic body are elastically deformed separately.
At this time, when the first outer surface of the one side portion of the elastic body is recessed in the axial direction in the first longitudinal sectional view, the one side portion of the elastic body is axially started from the portion recessed in the first outer surface. Try to bend toward the other side of the. On the other hand, the first inner surface of one side portion of the elastic body protrudes in the axial direction or extends linearly in the first longitudinal sectional view, so that the one side portion of the elastic body is on the other side in the axial direction. Bending toward is permitted, and bending toward one side in the axial direction is suppressed. Therefore, the one side portion of the elastic body can be bent toward the other side in the axial direction based on the shapes of the first outer surface and the first inner surface.
Moreover, when the 1st outer surface in the one side part of an elastic body is extended linearly in the 1st longitudinal cross-sectional view, it is suppressed that the one side part of an elastic body bends toward the one side of an axial direction. The In addition, as described above, the first inner surface of one side of the elastic body protrudes in the axial direction or extends linearly in the first longitudinal sectional view. Bending toward one side of the direction is suppressed. Therefore, based on the shape of the first outer surface and the first inner surface, the size of the elastic body in the first orthogonal direction is suppressed while suppressing the one side portion of the elastic body from bending toward the one side in the axial direction. Can be small. Thereby, the one side portion of the elastic body can be compressed in the first orthogonal direction to be thick in the axial direction, and the one side portion of the elastic body can be projected toward the main liquid chamber.
As described above, the one side portion of the elastic body can be bent toward the other side in the axial direction, or can be projected toward the main liquid chamber. However, the volume of the portion located on one side in the first orthogonal direction can be reduced.

Meanwhile, at this time, the second inner surface of the other side portion of the elastic body is recessed in the axial direction in the first longitudinal sectional view, so that the second inner surface extends in the first orthogonal direction. The portion is deformed toward the other side in the axial direction. On the other hand, the second outer surface of the other side portion of the elastic body protrudes in the axial direction or extends linearly in the first longitudinal sectional view, so that the other side portion of the elastic body is on the other side in the axial direction. It is allowed to be deformed toward the side, and is prevented from bending toward one side in the axial direction.
Therefore, the other side portion of the elastic body can be deformed toward the other side in the axial direction on the basis of the shapes of the second outer surface and the second inner surface, and the second mounting member of the main liquid chamber can be deformed. On the other hand, the volume of the part located on the other side in the first orthogonal direction can be reduced.

  As described above, when the second mounting member moves toward one side in the first orthogonal direction with respect to the first mounting member, the main liquid chamber has both sides in the first orthogonal direction with respect to the second mounting member. It is possible to reduce the volume of each part located and reduce the volume of the entire main liquid chamber.

By the way, also when the second mounting member moves toward the other side in the first orthogonal direction with respect to the first mounting member, the one side portion and the other side portion of the elastic body are elastically deformed separately.
At this time, when the second mounting member moves toward the other side in the first orthogonal direction with respect to the first mounting member, the first outer surface of the one side portion of the elastic body is in the axial direction in the first longitudinal sectional view. When it is depressed, one side portion of the elastic body is deformed toward one side in the axial direction so that the first outer surface extends in the first orthogonal direction. On the other hand, the first inner surface in the one side portion of the elastic body protrudes in the axial direction or extends linearly in the first longitudinal sectional view, so that the one side portion of the elastic body is on one side in the axial direction. It is allowed to be deformed toward the outside, and is prevented from bending toward the other side in the axial direction. Therefore, the one side portion of the elastic body can be deformed toward the one side in the axial direction based on the shapes of the first outer surface and the first inner surface.
Moreover, when the 1st outer surface in the one side part of an elastic body is extended linearly in 1st longitudinal cross-sectional view, it is suppressed that the one side part of an elastic body bends toward the other side of an axial direction. The In addition, as described above, the first inner surface of one side of the elastic body protrudes in the axial direction or extends linearly in the first longitudinal sectional view. Bending toward the other side of the direction is suppressed. Therefore, based on the shape of the first outer surface and the first inner surface, the size of the elastic body in the first orthogonal direction is suppressed while suppressing the one side portion of the elastic body from bending toward the other side in the axial direction. Can be bigger. Accordingly, the one side portion of the elastic body can be pulled in the first orthogonal direction to be thin in the axial direction, and the one side portion of the elastic body can be recessed with respect to the main liquid chamber.
As described above, the one side portion of the elastic body can be deformed toward one side in the axial direction or can be dented with respect to the main liquid chamber. However, the volume of the portion located on one side in the first orthogonal direction can be increased.

On the other hand, since the second inner surface of the other side portion of the elastic body is recessed in the axial direction in the first longitudinal sectional view, the other side portion of the elastic body starts from the portion recessed on the second inner surface. Bend toward one side in the axial direction. On the other hand, the second outer surface of the other side portion of the elastic body protrudes in the axial direction or extends linearly in the first longitudinal sectional view, so that the other side portion of the elastic body is on one side in the axial direction. Bending toward is permitted, and bending toward the other side in the axial direction is suppressed.
Therefore, the other side portion of the elastic body can be bent toward one side in the axial direction based on the shapes of the second outer surface and the second inner surface, and the second mounting member of the main liquid chamber can be bent. On the other hand, the volume of the part located on the other side in the first orthogonal direction can be increased.

  As described above, when the second mounting member moves toward the other side in the first orthogonal direction with respect to the first mounting member, the main liquid chamber has both sides in the first orthogonal direction with respect to the second mounting member. It is possible to increase the volume of each part located and increase the volume of the entire main liquid chamber.

  As described above, when the second mounting member moves toward the one side in the first orthogonal direction with respect to the first mounting member, the volume of the main liquid chamber is reduced, and the second mounting member becomes the first mounting member. On the other hand, the volume of the main liquid chamber can be increased when moving toward the other side in the first orthogonal direction. Therefore, the main liquid chamber can be expanded and contracted when vibration in the first orthogonal direction is input from the vibration generating unit. Thereby, the liquid can be circulated through the restricting passage between the main liquid chamber and the sub liquid chamber to generate resonance, and the vibration can be absorbed and attenuated.

  As described above, in this vibration isolator, by providing the main liquid chamber and the sub liquid chamber and the restriction passage that communicates these, it is possible to exhibit damping characteristics against vibrations in both the axial direction and the first orthogonal direction. It becomes possible and the structure can be simplified.

  The second outer surface may protrude in the axial direction in the first longitudinal sectional view.

  In this case, the second outer surface protrudes in the axial direction in the first longitudinal sectional view. Therefore, when the second mounting member moves toward one side in the first orthogonal direction with respect to the first mounting member, the other side portion of the elastic body is easily deformed toward the other side in the axial direction. Can do. Further, when the second mounting member moves toward the other side in the first orthogonal direction with respect to the first mounting member, the other side portion of the elastic body is easily bent toward the one side in the axial direction. Can do. Thereby, when the vibration of the 1st orthogonal direction is input from the vibration generation part, a main liquid chamber can be expanded / contracted effectively.

  In the second longitudinal sectional view along both the axial direction and the second orthogonal direction orthogonal to both the axial direction and the first orthogonal direction, the elastic body is separated from the second mounting member to the second It may extend toward both sides in the orthogonal direction, and gradually toward the other side in the axial direction as it goes outward in the second orthogonal direction.

  In this case, the elastic body gradually moves toward the other side in the axial direction as it goes outward in the second orthogonal direction in the second longitudinal sectional view. Therefore, for example, when the vibration isolator is attached between the vibration generating unit and the vibration receiving unit, the initial load applied to the vibration isolator can be reliably received by the elastic body.

  The first outer surface is recessed in the axial direction in the first longitudinal sectional view, and the portion of the first outer surface that is recessed in the axial direction in the first longitudinal sectional view, and the second inner surface, A reinforcing portion may be provided on at least one of the portions recessed in the axial direction in the first longitudinal sectional view.

  In this case, at least one of the first outer surface that is recessed in the axial direction in the first longitudinal sectional view and the second inner surface that is recessed in the axial direction in the first longitudinal sectional view is provided with a reinforcing portion. Is provided. Therefore, when the first mounting member and the second mounting member are relatively displaced in the first orthogonal direction, the degree of bending of the one side portion and the other side portion of the elastic body can be adjusted. Thereby, it becomes possible to suppress that the one side part and the other side part of an elastic body bend excessively, and the main liquid chamber can be expanded and contracted effectively.

  The reinforcing portion may include a protrusion protruding in the axial direction.

  In this case, since the reinforcement part is provided with the protrusion part which protrudes in an axial direction, a reinforcement part can be formed with the same material as an elastic body etc., for example. Thereby, a structure can be simplified simply.

  According to the present invention, the structure can be simplified.

It is a perspective view which shows the principal part of the vibration isolator which concerns on 1st Embodiment of this invention. It is a longitudinal cross-sectional view which shows the state which looked at the vibration isolator shown in FIG. 1 in the 2nd vertical cross section. It is a longitudinal cross-sectional view which shows the state which looked at the principal part of the vibration isolator shown in FIG. 1 in the 1st vertical cross section. It is a perspective view which shows the principal part of the vibration isolator which concerns on 2nd Embodiment of this invention. It is a longitudinal cross-sectional view which shows the state which looked at the vibration isolator shown in FIG. 4 in the 2nd vertical cross section. It is a longitudinal cross-sectional view which shows the state which looked at the principal part of the vibration isolator shown in FIG. 4 in the 1st vertical cross section. It is a perspective view which shows the principal part of the vibration isolator which concerns on 3rd Embodiment of this invention. It is a longitudinal cross-sectional view which shows the state which looked at the vibration isolator shown in FIG. 7 in the 2nd vertical cross section. It is a longitudinal cross-sectional view which shows the state which looked at the principal part of the vibration isolator shown in FIG. 7 in the 1st vertical cross section.

(First embodiment)
Hereinafter, a vibration isolator according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3.
As shown in FIGS. 1 to 3, the vibration isolator 10 includes a cylindrical first mounting member 11 connected to one of the vibration generating unit and the vibration receiving unit, and a first connected to the other. 2 mounting member 12, elastic body 13 that couples both mounting members 11, 12 to each other, liquid chamber in first mounting member 11 in which liquid L is sealed, elastic body 13 as part of the wall surface And a partition member 16 that partitions the main liquid chamber 14 and the sub liquid chamber 15.

  In the illustrated example, the second mounting member 12 is formed in a columnar shape, and the first mounting member 11 and the second mounting member 12 are disposed coaxially with the common shaft. Hereinafter, this common shaft is referred to as an axis (axis of the first mounting member) O, the main liquid chamber 14 side along the axis O direction is referred to as one side, and the sub liquid chamber 15 side is referred to as the other side. A direction orthogonal to the axis O is referred to as a radial direction (a radial direction of the first mounting member), and a direction around the axis O is referred to as a circumferential direction (a circumferential direction of the first mounting member).

  When the vibration isolator 10 is mounted on an automobile, for example, the second mounting member 12 is connected to an engine as a vibration generating unit, while the first mounting member 11 receives vibration through a bracket (not shown). It is connected to the vehicle body as a part to suppress the transmission of engine vibration to the vehicle body. The vibration isolator 10 is a liquid enclosure type in which a liquid L such as ethylene glycol, water, or silicone oil is enclosed in the liquid chamber of the first mounting member 11.

As shown in FIG. 2, the first attachment member 11 includes a one-side outer cylinder 21 located on one side and an other-side outer cylinder 22 located on the other side along the axis O direction. Yes.
The elastic body 13 is connected in a liquid-tight state to one end of the one-side outer cylinder 21, and the opening on one side of the one-side outer cylinder 21 is closed by the elastic body 13. Yes. The inside of the one side outer cylinder 21 is the main liquid chamber 14. The hydraulic pressure in the main liquid chamber 14 varies when the elastic body 13 is deformed and the internal volume of the main liquid chamber 14 changes when vibration is input.

  A diaphragm 17 is connected in a liquid-tight state to the other end of the other outer cylinder 22, and the other opening of the other outer cylinder 22 is closed by the diaphragm 17. Of the other-side outer cylindrical body 22, one end portion 22 a is formed with a larger diameter than the other portion, and is fitted in the other-side end portion 21 a of the one-side outer cylindrical body 21. . In addition, the partition member 16 is fitted in the other side outer cylindrical body 22, and a portion of the inside of the other side outer cylindrical body 22 located between the partition member 16 and the diaphragm 17 is the sub-liquid. It is chamber 15. The auxiliary liquid chamber 15 has the diaphragm 17 as a part of the wall surface, and expands and contracts when the diaphragm 17 is deformed. The other side outer cylinder 22 is covered almost entirely with a rubber film formed integrally with the diaphragm 17.

An internal thread portion 12 a is formed coaxially with the axis O on the one end face of the second mounting member 12. The second mounting member 12 protrudes from the first mounting member 11 to one side.
The elastic body 13 is formed of, for example, a rubber material that can be elastically deformed, and is formed in an annular shape that is coaxial with the axis O. Of the elastic body 13, the inner peripheral edge is connected to the second mounting member 12, and the outer peripheral edge is connected to the first mounting member 11. The inner peripheral surface of the outer cylinder 21 on one side of the first mounting member 11 and the end surface on the other side of the second mounting member 12 are covered almost entirely by a rubber film formed integrally with the elastic body 13. It has been broken.

  The partition member 16 is disposed coaxially with the axis O and is fitted in the first mounting member 11. The partition member 16 is provided with a flange portion 16a that protrudes outward in the radial direction. The flange portion 16 a is provided at one end of the partition member 16. The flange portion 16 a is disposed in one end portion 22 a of the other side outer cylindrical body 22.

  The partition member 16 is provided with a restriction passage 16b. The restriction passage 16b causes resonance (liquid column resonance) when the liquid L flows. The resonance frequency of the restriction passage 16b is equal to the frequency of vibration normally input to the vibration isolator 10, and the restriction passage 16b resonates with respect to such normal vibration input (liquid column resonance). ). Examples of the normal vibration include a shake vibration (for example, a frequency of 14 Hz or less and an amplitude greater than ± 0.5 mm), and an idle vibration having a higher frequency and a smaller amplitude than the shake vibration (for example, a frequency of 18 Hz to 30 Hz). , The amplitude is ± 0.5 mm or less).

Here, as shown in FIG. 1, the first mounting member 11 is formed in a rectangular tube shape. The first mounting member 11 is formed in a rectangular shape in a plan view as viewed from the direction of the axis O, and in the illustrated example, a rectangular shape. Of the directions orthogonal to the axis O direction, the direction along the long side direction (major axis direction) of the first mounting member 11 in plan view is referred to as a first orthogonal direction D1, and the first mounting member 11 has a plan view shape. The direction along the short side direction (short axis direction) is referred to as a second orthogonal direction D2. The first orthogonal direction D1 and the second orthogonal direction D2 are orthogonal to each other.
The second attachment member 12 is formed in a prismatic shape. The second mounting member 12 is formed in a rectangular shape in plan view, and in the illustrated example, in a square shape. The four side surfaces of the second mounting member 12 extend along the first orthogonal direction D1 and the second orthogonal direction D2, respectively.

  As shown in FIG. 2, the elastic body 13 extends from the second mounting member 12 toward both sides of the second orthogonal direction D2 in the second longitudinal sectional view along both the second orthogonal direction D2 and the axis O direction. As it goes to the outside of the second orthogonal direction D2, it gradually goes to the other side in the direction of the axis O. The inner peripheral edge and the outer peripheral edge of the elastic body 13 are shifted in the axis O direction and do not overlap in the axis O direction in the second longitudinal sectional view. The elastic body 13 is formed symmetrically with respect to the axis O in the second longitudinal sectional view. The elastic body 13 extends in a direction inclined with respect to the axis O in the second longitudinal sectional view.

As shown in FIG. 3, the elastic body 13 extends from the second mounting member 12 toward both sides of the first orthogonal direction D1 in the first longitudinal sectional view along both the first orthogonal direction D1 and the axis O direction. ing. The inner peripheral edge and the outer peripheral edge of the elastic body 13 overlap in the direction of the axis O in the first longitudinal sectional view, and are disposed at the same position in the direction of the axis O.
In the elastic body 13, the one side portion 31 located on one side of the first orthogonal direction D1 with respect to the second mounting member 12 and the other side located on the other side of the first orthogonal direction D1 with respect to the second mounting member 12. The side portion 32 is formed asymmetrically in the first orthogonal direction D1.

  Of the one side portion 31 of the elastic body 13, the first outer surface 33 located on one side in the direction of the axis O is recessed in the direction of the axis O in the first longitudinal sectional view. The first outer surface 33 connects the inner divided surface 33a located inside the first orthogonal direction D1, the outer divided surface 33b located outside the first orthogonal direction D1, and the inner divided surface 33a and the outer divided surface 33b. It is divided into a connecting division surface 33c. The inner dividing surface 33a gradually extends toward the other side in the direction of the axis O in the first longitudinal sectional view as it goes outward in the first orthogonal direction D1, and extends linearly while being inclined with respect to the axis O. ing. The outer dividing surface 33b extends linearly along the first orthogonal direction D1 in the first longitudinal sectional view. The connection division | segmentation surface 33c is formed in the concave curved surface shape which becomes concave toward the other side of the axis line O direction in 1st longitudinal cross-sectional view.

  Of the one side portion 31 of the elastic body 13, the first inner surface 34 located on the other side in the direction of the axis O projects in the direction of the axis O in the first longitudinal sectional view. The first inner surface 34 connects the inner divided surface 34a located inside the first orthogonal direction D1, the outer divided surface 34b located outside the first orthogonal direction D1, and the inner divided surface 34a and the outer divided surface 34b. It is divided into a connecting dividing surface 34c. The inner divided surface 34a gradually extends toward the other side in the direction of the axis O in the first longitudinal sectional view as it goes outward in the first orthogonal direction D1, and extends linearly while being inclined with respect to the axis O. ing. The outer dividing surface 34b extends linearly along the first orthogonal direction D1 in the first longitudinal sectional view. The connection division | segmentation surface 34c is formed in the convex curve shape which becomes convex toward the other side of the axis O direction in 1st longitudinal cross-sectional view.

  In the one side portion 31 of the elastic body 13, the connection division surface 33 c of the first outer surface 33 and the connection division surface 34 c of the first inner surface 34 are disposed at equivalent positions in the first orthogonal direction D <b> 1. In the one side portion 31 of the elastic body 13, the size in the direction of the axis O of the portion located between the inner divided surface 33a of the first outer surface 33 and the inner divided surface 34a of the first inner surface 34 is the first orthogonal direction D1. The size gradually increases from the outside to the inside.

  Of the other side portion 32 of the elastic body 13, the second outer surface 35 located on one side in the direction of the axis O projects in the direction of the axis O in the first longitudinal sectional view. The second outer surface 35 connects the inner divided surface 35a located inside the first orthogonal direction D1, the outer divided surface 35b located outside the first orthogonal direction D1, and the inner divided surface 35a and the outer divided surface 35b. It is divided into a connecting dividing surface 35c. The inner divided surface 35a gradually extends toward one side in the direction of the axis O in the first longitudinal sectional view as it goes outward in the first orthogonal direction D1, and extends linearly while being inclined with respect to the axis O. ing. The outer dividing surface 35b gradually extends toward one side in the direction of the axis O in the first longitudinal sectional view as it goes in the first orthogonal direction D1, and extends linearly while being inclined with respect to the axis O. ing. The connection division | segmentation surface 35c is formed in the convex curved surface shape which becomes convex toward the one side of the axis O direction in 1st longitudinal cross-sectional view.

  Of the other side portion 32 of the elastic body 13, the second inner surface 36 located on the other side in the axis O direction is recessed in the axis O direction. The second inner surface 36 connects the inner divided surface 36a located inside the first orthogonal direction D1, the outer divided surface 36b located outside the first orthogonal direction D1, and the inner divided surface 36a and the outer divided surface 36b. It is divided into a connecting division surface 36c. The inner divided surface 36a gradually extends toward one side in the direction of the axis O in the first longitudinal sectional view as it goes outward in the first orthogonal direction D1, and extends linearly while being inclined with respect to the axis O. ing. The outer divided surface 36b gradually extends toward one side in the direction of the axis O in the first longitudinal sectional view as it goes in the first orthogonal direction D1, and extends linearly while being inclined with respect to the axis O. ing. The connection division | segmentation surface 36c is formed in the concave curved surface shape which becomes concave toward the one side of the axis O direction in 1st longitudinal cross-sectional view.

In the other side portion 32 of the elastic body 13, the connection division surface 35 c of the second outer surface 35 and the connection division surface 36 c of the second inner surface 36 are arranged at equivalent positions in the first orthogonal direction D <b> 1. The size of the other side portion 32 of the elastic body 13 in the direction of the axis O is the same over the entire length in the first orthogonal direction D1.
As shown in FIG. 1, the position in the axis O direction depends on the position in the second orthogonal direction D2 in each of the first outer surface 33, the first inner surface 34, the second outer surface 35, and the second inner surface 36 of the elastic body 13. It is equivalent.

  Next, the operation of the vibration isolator 10 configured as described above will be described.

  The vibration isolator 10 is arranged such that the axis O direction and the first orthogonal direction D1 are along the direction in which vibration is input from the vibration generating unit. For example, when the vibration isolator 10 is mounted on an automobile, and vibration is input from the engine of the automobile to the vibration isolator 10 in the vertical direction and the front-rear direction of the vehicle body, the vibration isolator 10 is connected to the axis O. It arrange | positions so that a direction may follow a vertical direction and the 1st orthogonal direction D1 may follow the front-back direction of a vehicle body. The vibration isolator 10 can be suitably applied to a pendulum suspension system in which the direction of vibration input from the engine is easily separated.

  When vibration in the direction of the axis O is input from the vibration generating unit to the vibration isolator 10, the first mounting member 11 and the second mounting member 12 are relatively displaced in the direction of the axis O. At this time, the elastic body 13 is elastically deformed in the direction of the axis O, and the main liquid chamber 14 expands and contracts, so that the liquid L flows between the main liquid chamber 14 and the sub liquid chamber 15 through the restricting passage 16b. Resonance (resonance) occurs, and vibration is absorbed and damped.

  When vibration in the first orthogonal direction D1 is input from the vibration generating unit, the first mounting member 11 and the second mounting member 12 are relatively displaced in the first orthogonal direction D1, and the second mounting member 12 is moved. It moves toward one side of the first orthogonal direction D1 relative to the first mounting member 11, or moves toward the other side of the first orthogonal direction D1.

When the second mounting member 12 moves toward one side of the first orthogonal direction D1 with respect to the first mounting member 11, the one side portion 31 and the other side portion 32 of the elastic body 13 are elastically deformed separately.
At this time, the first outer surface 33 in the one side portion 31 of the elastic body 13 is recessed in the direction of the axis O in the first longitudinal sectional view, so that the one side portion 31 of the elastic body 13 is recessed in the first outer surface 33. It tries to bend toward the other side in the direction of the axis O starting from the bent portion. On the other hand, the first inner surface 34 of the one side portion 31 of the elastic body 13 protrudes in the direction of the axis O in the first longitudinal sectional view, so that the one side portion 31 of the elastic body 13 is the other side of the axis O direction. Is allowed to bend toward the other side, and is prevented from bending toward one side in the direction of the axis O. Therefore, the one side portion 31 of the elastic body 13 can be bent toward the other side in the direction of the axis O based on the shapes of the first outer surface 33 and the first inner surface 34. As a result, the volume of the portion of the main liquid chamber 14 located on one side of the first orthogonal direction D1 with respect to the second mounting member 12 can be reduced.

At this time, the second inner surface 36 in the other side portion 32 of the elastic body 13 is recessed in the direction of the axis O in the first longitudinal sectional view, so that the second inner surface 36 extends in the first orthogonal direction D1. The other side portion 32 of the elastic body 13 is deformed toward the other side in the axis O direction. On the other hand, the second outer surface 35 of the other side portion 32 of the elastic body 13 protrudes in the direction of the axis O in the first longitudinal sectional view, so that the other side portion 32 of the elastic body 13 becomes the other side in the direction of the axis O. And is allowed to be deformed toward one side in the direction of the axis O.
Accordingly, the other side portion 32 of the elastic body 13 can be deformed toward the other side in the direction of the axis O based on the shapes of the second outer surface 35 and the second inner surface 36, and the main liquid chamber 14 The volume of the portion located on the other side in the first orthogonal direction D1 with respect to the second mounting member 12 can be reduced.

  As described above, when the second mounting member 12 moves toward one side in the first orthogonal direction D1 with respect to the first mounting member 11, the first mounting member 12 in the main liquid chamber 14 is first. The volume of each part located on both sides of the orthogonal direction D1 can be reduced, and the volume of the main liquid chamber 14 as a whole can be reduced.

Even when the second mounting member 12 moves toward the other side of the first orthogonal direction D1 with respect to the first mounting member 11, the one side portion 31 and the other side portion 32 of the elastic body 13 are elastically deformed separately. To do.
At this time, the first outer surface 33 of the one side portion 31 of the elastic body 13 is recessed in the direction of the axis O in the first longitudinal sectional view, so that the first outer surface 33 extends in the first orthogonal direction D1. One side portion 31 of the elastic body 13 is deformed toward one side in the direction of the axis O. On the other hand, since the first inner surface 34 of the one side portion 31 of the elastic body 13 protrudes in the direction of the axis O in the first longitudinal sectional view, the one side portion 31 of the elastic body 13 becomes one side of the axis O direction. And is allowed to bend toward the other side in the direction of the axis O. Therefore, the one side portion 31 of the elastic body 13 can be deformed toward one side in the direction of the axis O based on the shapes of the first outer surface 33 and the first inner surface 34. As a result, the volume of the portion of the main liquid chamber 14 located on one side of the first orthogonal direction D1 with respect to the second mounting member 12 can be increased.

At this time, the second inner surface 36 of the other side portion 32 of the elastic body 13 is recessed in the direction of the axis O in the first longitudinal sectional view, so that the other side portion 32 of the elastic body 13 is in the second inner surface 36. Bending toward the one side in the direction of the axis O starting from the depressed portion. On the other hand, the second outer surface 35 of the other side portion 32 of the elastic body 13 protrudes in the direction of the axis O in the first longitudinal sectional view, so that the other side portion 32 of the elastic body 13 is on one side in the direction of the axis O. Bending toward the other side is allowed, and bending toward the other side in the direction of the axis O is suppressed.
Therefore, the other side portion 32 of the elastic body 13 can be bent toward one side in the direction of the axis O based on the shapes of the second outer surface 35 and the second inner surface 36, and the main liquid chamber 14. The volume of the portion located on the other side of the first orthogonal direction D1 with respect to the second mounting member 12 can be increased.

  As described above, when the second attachment member 12 moves toward the other side of the first orthogonal direction D1 with respect to the first attachment member 11, the first attachment member 12 in the main liquid chamber 14 is first. It is possible to increase the volume of each part located on both sides of the orthogonal direction D1 and increase the volume of the main liquid chamber 14 as a whole.

  As described above, when the second mounting member 12 moves toward the one side in the first orthogonal direction D1 with respect to the first mounting member 11, the volume of the main liquid chamber 14 is reduced, and the second mounting member 12 is reduced. Can move toward the other side of the first orthogonal direction D1 with respect to the first mounting member 11, the volume of the main liquid chamber 14 can be increased. Therefore, when the vibration in the first orthogonal direction D1 is input from the vibration generating unit, the main liquid chamber 14 can be expanded or contracted. Thereby, the liquid L can be circulated between the main liquid chamber 14 and the sub liquid chamber 15 through the restriction passage 16b to generate resonance, and vibration can be absorbed and attenuated.

  As described above, according to the vibration isolator 10 according to the present embodiment, the main liquid chamber 14 and the sub liquid chamber 15 and the restriction passage 16b that communicates these are provided, so that the axis O direction and the first It becomes possible to exhibit damping characteristics against vibrations in both directions in the orthogonal direction D1, and the structure can be simplified.

  Further, the second outer surface 35 protrudes in the direction of the axis O in the first longitudinal sectional view. Therefore, when the second mounting member 12 moves toward the one side in the first orthogonal direction D1 with respect to the first mounting member 11, the other side portion 32 of the elastic body 13 is directed toward the other side in the axis O direction. Can be easily deformed. Further, when the second mounting member 12 moves toward the other side of the first orthogonal direction D1 with respect to the first mounting member 11, the other side portion 32 of the elastic body 13 is directed to one side in the axis O direction. Can be easily bent. Thereby, when the vibration of the 1st orthogonal direction D1 is input from the vibration generation part, the main liquid chamber 14 can be expanded / contracted effectively.

  Further, as shown in FIG. 2, the elastic body 13 gradually moves toward the other side in the direction of the axis O as it goes outward in the second orthogonal direction D2 in the second longitudinal sectional view. Therefore, for example, when the vibration isolator 10 is attached between the vibration generating unit and the vibration receiving unit, the initial load applied to the vibration isolator 10 can be reliably received by the elastic body 13.

(Second Embodiment)
Next, a vibration isolator according to a second embodiment of the present invention will be described with reference to FIGS.
In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different points will be described.

  In the vibration isolator 40 of the present embodiment, as shown in FIG. 6, the one side portion 31 and the other side portion 32 of the elastic body 13 are based on a reference point located on the axis O in the first longitudinal sectional view. It is formed point-symmetrically.

  The inner divided surface 33a of the first outer surface 33 of the elastic body 13 gradually extends toward the other side in the direction of the axis O in the first longitudinal sectional view, and extends toward the other side in the direction of the axis O. In contrast, it extends linearly while inclining. The outer dividing surface 33b of the first outer surface 33 gradually extends toward the other side in the direction of the axis O and inclines with respect to the axis O in the first longitudinal sectional view as it goes inward in the first orthogonal direction D1. However, it extends linearly. The inner divided surface 33a and the outer divided surface 33b of the first outer surface 33 have shapes that are reversed in the first orthogonal direction D1 in the first longitudinal sectional view. The connection division surface 33c of the first outer surface 33 extends linearly along the first orthogonal direction D1.

The inner divided surface 34a of the first inner surface 34 of the elastic body 13 gradually extends toward the other side in the direction of the axis O in the first longitudinal sectional view, and extends toward the other side in the axis O direction. In contrast, it extends linearly while inclining. The outer divided surface 34b of the first inner surface 34 gradually extends toward the other side in the direction of the axis O as it goes inward in the first orthogonal direction D1 in the first longitudinal sectional view, and is inclined with respect to the axis O. However, it extends linearly. The inner divided surface 34a and the outer divided surface 33b of the first inner surface 34 have shapes that are reversed in the first orthogonal direction D1 in the first longitudinal sectional view. The connection dividing surface 34c of the first inner surface 34 extends linearly along the first orthogonal direction D1.
The first outer surface 33 and the first inner surface 34 extend in parallel in the first longitudinal sectional view, and the size of the one side portion 31 of the elastic body 13 in the direction of the axis O is the same over the entire length in the first orthogonal direction D1. It has become.

  The inner divided surface 35a of the second outer surface 35 of the elastic body 13 gradually extends toward one side in the direction of the axis O in the first longitudinal sectional view as it goes to the outer side of the first orthogonal direction D1. In contrast, it extends linearly while inclining. The outer divided surface 35b of the second outer surface 35 gradually extends toward one side in the axis O direction and inclines with respect to the axis O in the first longitudinal sectional view as it goes inward in the first orthogonal direction D1. However, it extends linearly. The inner divided surface 35a and the outer divided surface 33b of the second outer surface 35 have shapes reversed in the first orthogonal direction D1 in the first longitudinal sectional view. The connection dividing surface 35c of the second outer surface 35 extends linearly along the first orthogonal direction D1.

The inner divided surface 36a of the second inner surface 36 of the elastic body 13 gradually extends toward one side in the direction of the axis O in the first longitudinal sectional view and extends toward the outer side of the first orthogonal direction D1. In contrast, it extends linearly while inclining. The outer divided surface 36b of the second inner surface 36 gradually extends toward one side in the axis O direction and inclines with respect to the axis O in the first longitudinal sectional view as it goes inward in the first orthogonal direction D1. However, it extends linearly. The inner divided surface 36a and the outer divided surface 33b of the second inner surface 36 have shapes reversed in the first orthogonal direction D1 with respect to each other in the first longitudinal sectional view. The connection dividing surface 36c of the second inner surface 36 extends linearly along the first orthogonal direction D1.
The second outer surface 35 and the second inner surface 36 extend in parallel in the first longitudinal sectional view, and the size of the other side portion 32 of the elastic body 13 in the direction of the axis O is the same over the entire length in the first orthogonal direction D1. It has become.

  Here, in the present embodiment, a portion of the first outer surface 33 that is recessed in the direction of the axis O in the first longitudinal sectional view and a portion of the second inner surface 36 that is recessed in the direction of the axis O in the first longitudinal sectional view. At least one of them is provided with a reinforcing portion 41. The reinforcing portion 41 is provided on both the first outer surface 33 and the second inner surface 36. The reinforcing portion 41 is provided on the connection split surfaces 33c and 36c on the first outer surface 33 and the second inner surface 36, respectively.

  The reinforcing portion 41 includes a protrusion 42 that protrudes in the direction of the axis O. The protrusion 42 is integrally formed of the same material as the elastic body 13. The protrusion 42 is formed in a rectangular shape in the first longitudinal sectional view. The magnitude | size of the 1st orthogonal direction D1 of the protrusion 42 is equivalent to the magnitude | size of the 1st orthogonal direction D1 of the connection division | segmentation surfaces 33c and 36c. As shown in FIG. 4, the protrusion 42 is formed in a convex rib shape extending in the second orthogonal direction D2. An end surface of the protrusion 42 facing the direction of the axis O is parallel to the connection dividing surfaces 33c and 36c.

  As described above, according to the vibration isolator 40 according to the present embodiment, the first outer surface 33 of the first inner surface 33 and the second inner surface 36 of the first inner surface 36 are recessed in the direction of the axis O. A reinforcing portion 41 is provided in at least one of the portions that are recessed in the direction of the axis O in the longitudinal sectional view. Therefore, when the first mounting member 11 and the second mounting member 12 are relatively displaced in the first orthogonal direction D1, the degree of bending of the one side portion 31 and the other side portion 32 of the elastic body 13 is adjusted. Can do. Thereby, it becomes possible to suppress that the one side part 31 and the other side part 32 of the elastic body 13 bend excessively, and the main liquid chamber 14 can be expanded and contracted effectively.

  Moreover, since the reinforcement part 41 is provided with the protrusion 42 which protrudes in the axis line O direction, the reinforcement part 41 can be formed with the same material as the elastic body 13 etc. like this embodiment, for example. Thereby, a structure can be simplified simply.

(Third embodiment)
Next, a vibration isolator according to a third embodiment of the present invention will be described with reference to FIGS.
In the third embodiment, the same components as those in the second embodiment are denoted by the same reference numerals, description thereof is omitted, and only different points will be described.

In the vibration isolator 50 of the present embodiment, as shown in FIG. 7, the first outer surface 33, the first inner surface 34, the second outer surface 35, the second inner surface 36 of the elastic body 13 and the end surface of the protrusion 42 of the reinforcing portion 41. Are gradually extended toward the other side in the direction of the axis O in the second orthogonal direction D2, and are convex or concave toward the one side in the direction of the axis O in the second longitudinal sectional view. It is formed in a curved shape.
According to the vibration isolator 50 according to the present embodiment, it is possible to achieve the same effects as the vibration isolator 40 according to the second embodiment.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

  In the said 2nd and 3rd embodiment, although the reinforcement part 41 is provided with the protrusion 42, this invention is not limited to this. For example, the reinforcing portion 41 may include a hard plate that is fixed to the elastic body 13. Further, the reinforcing portion 41 can be appropriately changed to another form provided on at least one of the first outer surface 33 and the second inner surface 36. Further, the reinforcing portion 41 may not be provided.

  In the said embodiment, although the 1st inner surface 34 and the 2nd outer surface 35 protrude in the axis line O direction in 1st longitudinal cross-sectional view, this invention is not limited to this. For example, the first inner surface 34 and the second outer surface 35 may extend linearly in the first longitudinal sectional view, and may extend straight without bending or bending in the first orthogonal direction.

In the embodiment, the first outer surface 33 is recessed in the direction of the axis O in the first longitudinal sectional view, but the present invention is not limited to this. For example, the first outer surface 33 may extend linearly in the first longitudinal sectional view.
In this case, vibration is input to the vibration isolator 10, 40, 50 in the first orthogonal direction D <b> 1, and the second mounting member 12 moves toward one side of the first orthogonal direction D <b> 1 with respect to the first mounting member 11. In some cases, the one side portion 31 of the elastic body 13 is suppressed from bending toward one side in the direction of the axis O. In addition, the first inner surface 34 of the one side portion 31 of the elastic body 13 protrudes in the direction of the axis O or extends linearly in the first longitudinal sectional view, as described above. The side portion 31 is restrained from bending toward one side in the axis O direction. Therefore, based on the shape of the first outer surface 33 and the first inner surface 34, the first side 31 of the elastic body 13 is prevented from being bent toward one side in the direction of the axis O, while the first of the elastic body 13. The size of the orthogonal direction D1 can be reduced. Accordingly, the one side portion 31 of the elastic body 13 is compressed in the first orthogonal direction D1 to be thick in the axis O direction, and the one side portion 31 of the elastic body 13 is projected toward the main liquid chamber 14. it can. As a result, the volume of the portion of the main liquid chamber 14 located on one side of the first orthogonal direction D1 with respect to the second mounting member 12 can be reduced.
Further, in this case, when the second mounting member 12 moves toward the other side in the first orthogonal direction D1 with respect to the first mounting member 11, the one side portion 31 of the elastic body 13 moves to the other side in the axis O direction. Bending toward is suppressed. In addition, the first inner surface 34 of the one side portion 31 of the elastic body 13 protrudes in the direction of the axis O or extends linearly in the first longitudinal sectional view, as described above. The side portion 31 is restrained from bending toward the other side in the axis O direction. Therefore, based on the shape of the first outer surface 33 and the first inner surface 34, the first side 31 of the elastic body 13 is prevented from being bent toward the other side in the direction of the axis O, while the first side of the elastic body 13. The size of the orthogonal direction D1 can be increased. Accordingly, the one side portion 31 of the elastic body 13 can be pulled in the first orthogonal direction D1 to be thin in the direction of the axis O, and the one side portion 31 of the elastic body 13 can be recessed with respect to the main liquid chamber 14. As a result, the volume of the portion of the main liquid chamber 14 located on one side of the first orthogonal direction D1 with respect to the second mounting member 12 can be increased.

  In the said embodiment, although the 1st attachment member 11 is formed in the rectangular shape in planar view, this invention is not limited to this. For example, the first attachment member 11 may be formed in a circular shape or an elliptical shape in plan view.

  In the above embodiment, the engine is connected to the second mounting member 12 and the first mounting member 11 is connected to the vehicle body. However, the engine may be connected in reverse.

  Furthermore, the vibration isolator 10, 40, 50 according to the present invention is not limited to the engine mount of the vehicle, and can be applied to other than the engine mount. For example, the present invention can be applied to a mount of a generator mounted on a construction machine, or can be applied to a mount of a machine installed in a factory or the like.

  In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

10, 40, 50 Vibration isolator 11 First mounting member 12 Second mounting member 13 Elastic body 14 Main liquid chamber 15 Sub liquid chamber 16 Partition member 16b Restricted passage 31 One side portion 32 Other side portion 33 First outer surface 34 First Inner surface 35 Second outer surface 36 Second inner surface 41 Reinforcement portion 42 Projection portion D1 First orthogonal direction D2 Second orthogonal direction L Liquid O Axis line

Claims (5)

A cylindrical first mounting member coupled to one of the vibration generating unit and the vibration receiving unit, and a second mounting member coupled to the other;
An elastic body connecting both of these mounting members;
A liquid chamber in the first mounting member in which a liquid is sealed, a main liquid chamber located on one side along the axial direction of the first mounting member while using the elastic body as a part of the wall surface, and the axial direction A secondary liquid chamber located on the other side along the partition member,
A restriction passage communicating the main liquid chamber and the sub liquid chamber,
The elastic body is directed from the second mounting member toward both sides in the first orthogonal direction in a first longitudinal sectional view along both the first orthogonal direction orthogonal to the axial direction and the axial direction. Elongate,
In the elastic body, a first outer surface located on one side in the axial direction of one side portion located on one side in the first orthogonal direction with respect to the second mounting member is viewed in the first longitudinal sectional view. In the axial direction, or indented or extends linearly,
In the elastic body, a second inner surface located on the other side in the axial direction of the other side portion located on the other side in the first orthogonal direction with respect to the second mounting member is viewed in the first longitudinal section. In the axial direction,
The first inner surface located on the other side in the axial direction of the one side portion of the elastic body and the second outer surface located on the one side in the axial direction of the other side portion of the elastic body are 1. A vibration isolator that protrudes in the axial direction or extends linearly in a longitudinal sectional view.   The vibration isolator according to claim 1, wherein the second outer surface protrudes in the axial direction in the first longitudinal sectional view.   In the second longitudinal sectional view along both the axial direction and the second orthogonal direction orthogonal to both the axial direction and the first orthogonal direction, the elastic body is separated from the second mounting member to the second The vibration isolator according to claim 2, wherein the vibration isolator extends toward both sides in the orthogonal direction and gradually toward the other side in the axial direction as it goes outward in the second orthogonal direction. The first outer surface is recessed in the axial direction in the first longitudinal sectional view,
Of the first outer surface, at least one of the portion recessed in the axial direction in the first longitudinal sectional view and the portion of the second inner surface recessed in the axial direction in the first longitudinal sectional view. The vibration isolator according to claim 1, further comprising a reinforcing portion.   The anti-vibration device according to claim 4, wherein the reinforcing portion includes a protrusion protruding in the axial direction.

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