JP5767889B2 - Vibration isolator - Google Patents

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, as this type of vibration isolator, for example, as shown in Patent Document 1 below, an inner member connected to one of a vibration generating unit and a vibration receiving unit, and a cylindrical shape connected to the other An outer member of the inner member, an elastic member connecting the two members, a pressure receiving liquid chamber in the outer member in which the elastic member is a part of the wall surface and the liquid is sealed, and the outer peripheral surface of the inner member and the outside There is known a configuration including an elastic partition wall that is partitioned into a plurality of divided liquid chambers by connecting an inner peripheral surface of a material.

JP 2011-27226 A

  However, in the conventional vibration isolator, when vibration is input to the vibration isolator in the radial direction of the inner member, stress is concentrated locally on the elastic partition wall, so that the elastic partition wall has an early life. There is a risk of reaching.

  This invention is made | formed in view of the situation mentioned above, The objective is to provide the vibration isolator which can make it easy to maintain the performance of an elastic partition wall over a long period of time.

In order to solve the above problems, the present invention proposes the following means.
An anti-vibration device according to the present invention includes an inner member connected to one of a vibration generating unit and a vibration receiving unit, a cylindrical outer member connected to the other, and an elastic connecting these two members. A body member, and a pressure receiving liquid chamber in the outer member in which the elastic member is a part of the wall surface and in which liquid is sealed, and the outer peripheral surface of the inner member and the inner peripheral surface of the outer member are connected An elastic partition wall partitioned into a plurality of divided liquid chambers, wherein the inner member and the outer member are positioned along the circumferential direction of the inner member on the outer peripheral surface of the inner member. The lengths of the imaginary lines extending from the inner member to the inner peripheral surface of the outer member along the radial direction of the inner member are different from each other, and are cross sections orthogonal to the axis of the inner member A pair of wall surfaces defining the divided liquid chamber in the elastic partition wall At least one, and elastic partition wall of the center line of the can, is disposed so as to avoid the shortest imaginary lines among the respective virtual line, in the cross section view, the pair of wall surfaces parallel to each other, And it is characterized by extending linearly .
An anti-vibration device according to the present invention includes an inner member connected to one of a vibration generating unit and a vibration receiving unit, a cylindrical outer member connected to the other, and an elastic connecting these two members. A body member, and a pressure receiving liquid chamber in the outer member in which the elastic member is a part of the wall surface and in which liquid is sealed, and the outer peripheral surface of the inner member and the inner peripheral surface of the outer member are connected An elastic partition wall partitioned into a plurality of divided liquid chambers, wherein the inner member and the outer member are positioned along the circumferential direction of the inner member on the outer peripheral surface of the inner member. The lengths of the imaginary lines extending from the inner member to the inner peripheral surface of the outer member along the radial direction of the inner member are different from each other, and are cross sections orthogonal to the axis of the inner member A pair of wall surfaces defining the divided liquid chamber in the elastic partition wall At least one of them and the center line of the elastic partition wall are arranged to avoid the shortest imaginary line among the imaginary lines, and the inner member and the outer member are The material is formed in a rectangular shape or an elliptical shape so that the lengths of the virtual lines are different from each other.

  According to the present invention, since at least one of the pair of wall surfaces and the center line of the elastic partition wall are arranged so as to avoid the shortest virtual line in the cross sectional view, the shortest virtual line It is possible to easily secure the length from the inner end connected to the outer peripheral surface of the inner member to the outer end connected to the inner peripheral surface of the outer member on the wall surface avoiding the line. Thus, the elastic partition wall can be provided with high flexibility. As a result, when vibration is input to the vibration isolator in the radial direction of the inner member, the stress acting on the elastic partition wall is dispersed throughout the elastic partition wall, and the stress is locally concentrated on the elastic partition wall. Can be suppressed, and the performance of the elastic partition wall can be easily maintained over a long period of time.

  In addition, at least one of the pair of wall surfaces may extend so as to be inclined with respect to the shortest imaginary line in the cross sectional view.

In this case, in the cross sectional view, at least one of the pair of wall surfaces extends so as to be inclined with respect to the shortest imaginary line. The length from the inner end portion to the outer end portion can be easily ensured, and the elastic partition wall can be provided with higher flexibility.
In addition, when the wall surface inclined with respect to the shortest imaginary line avoids the shortest imaginary line, the above-described effects can be reliably achieved.

  Further, both of the pair of wall surfaces may be arranged so as to avoid the shortest imaginary line in the cross sectional view.

  In this case, since both of the pair of wall surfaces are arranged so as to avoid the shortest imaginary line in the cross sectional view, the inner end portion is extended to the outer end portion on both of the pair of wall surfaces. It is possible to make it easy to secure the respective lengths up to the above, and the elastic partition wall can be provided with higher flexibility.

Here, when the pair of wall surfaces are parallel to each other and extend linearly in the cross-sectional view, when the vibration is input to the vibration isolator in the radial direction of the inner member, It is possible to further suppress local concentration of stress on the partition wall, and to easily maintain the performance of the elastic partition wall reliably over a long period of time.

Further, in the cross section view, when the outer member is, by forming a rectangular shape or an elliptical shape, wherein as the length of each virtual line are different from each other, the inner member and outer member are configured, the antivibration Variations in device layout can be increased.

  According to the vibration isolator which concerns on this invention, it can make it easy to maintain the performance of an elastic partition wall over a long period of time.

It is a longitudinal cross-sectional view of the vibration isolator which concerns on 1st Embodiment of this invention. It is an AA cross-sectional arrow view shown in FIG. It is a cross-sectional view of the vibration isolator which concerns on 2nd Embodiment of this invention. It is a cross-sectional view of the vibration isolator which concerns on the modification of this invention. It is a cross-sectional view of the vibration isolator which concerns on the modification of this invention.

(First embodiment)
Hereinafter, a vibration isolator according to a first embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the vibration isolator 1 includes a cylindrical outer member 2 coupled to the vibration generating unit, an inner member 3 coupled to the vibration receiving unit, and the outer member 2 and the inner member 3. A diaphragm that forms a liquid chamber 5 in which a liquid is sealed in a portion located between the elastic member 4 and the elastic member 4 in the outer member 2. 6, a cover member 7 that covers the diaphragm 6 from the outside, a liquid chamber 5 that is partitioned in the direction of the first axis O1 of the inner member 3, and the elastic member 4 is a part of the wall surface (pressure receiving liquid chamber). 8 and the secondary liquid chamber 9, and the main liquid chamber 8 is connected to the outer peripheral surface 3 a of the inner member 3 and the inner peripheral surface 2 a of the outer member 2 by connecting the two (plural). ) Of the divided main liquid chamber (divided liquid chamber) 11, the two divided main liquid chambers 11, and the sub liquid chamber 9 communicate with each other. That the restricted passage 35 of the two (plural), and a.
The vibration isolator 1 is a so-called liquid enclosure type in which, for example, ethylene glycol, water, silicone oil or the like is enclosed as the liquid.

  As shown in FIG. 1, the inner member 3 is formed in a cylindrical shape, and is located on one side of the inner member 3 along the first axis O1 direction (in the example shown in FIG. 1, the upper side in the drawing). The end is located on the one side with respect to the outer member 2, and the other side of the outer member 2 opposite to the one side (the lower side in the drawing in the example shown in FIG. 1) is the outer member 2. Located in.

As shown in FIGS. 1 and 2, the inner member 3 includes a hard column portion 23 that is disposed coaxially with the first axis O <b> 1 and a cylindrical shape that is formed in a cylindrical shape coaxial with the first axis O <b> 1. And a first covering cylinder portion 24 that covers the outer peripheral surface of the first covering cylinder portion 24.
The 1st covering cylinder part 24 is formed, for example with elastic materials, such as a rubber material.

As shown in FIG. 1, an intermediate member 17 disposed coaxially with the first axis O <b> 1 is connected to the one end portion of the hard column portion 23 from the one side of the outer end portion. In the illustrated example, the mediating member 17 is formed in a disk shape.
Further, an internal thread portion 23 a to which a connection bolt (not shown) is screwed is formed at the other end portion of the hard column portion 23.

  The second axis O2 of the external member 2 extends in parallel with the first axis O1, and is coaxial with the first axis O1 in this embodiment. As shown in FIG. 2, the outer member 2 has a non-circular rectangular shape in a cross-sectional view orthogonal to the first axis O1, and the rectangular shape has straight side portions. It is connected via a corner. And each extended from the position along the circumferential direction of the inner member 3 to the inner circumferential surface 2a of the outer member 2 along the radial direction of the inner member 3 on the outer circumferential surface 3a of the inner member 3 The lengths of the virtual lines V1 and V2 are different from each other. In the illustrated example, of the virtual lines V1 and V2, the longest virtual line V1 extends along the longitudinal width direction of the rectangular shape, and a pair is disposed with the inner member 3 sandwiched in the longitudinal width direction. The shortest virtual line V2 extends along the short width direction of the rectangular shape, and a pair of shortest virtual lines V2 are disposed with the inner member 3 interposed therebetween in the short width direction.

As shown in FIG. 1, the outer member 2 includes a hard cylinder portion 19 disposed coaxially with the second axis O2 and an inner periphery of the hard cylinder portion 19 formed in a cylindrical shape coaxial with the second axis O2. Second covering cylinder portions 20 and 21 that respectively cover the surface and the outer peripheral surface.
The hard cylindrical portion 19 includes a small-diameter portion 13 into which the partition member 10 is fitted, an annular flange portion 14 having an inner peripheral edge coupled to the other edge of the small-diameter portion 13, and the flange portion 14. A large-diameter portion 15 that protrudes from the outer peripheral edge to the other side, has a larger diameter than the small-diameter portion 13, and is continuously provided from the small-diameter portion 13 to the one side, and gradually expands from the other side toward the one side. And an enlarged diameter portion 16 that is diametered.

  The second covered cylinder portions 20 and 21 are made of an elastic material such as a rubber material, for example. Of the second covered cylinder portions 20 and 21, the inner covered cylinder portion 20 that covers the inner peripheral surface of the hard cylinder portion 19 covers the inner peripheral surface of the small diameter portion 13 in the hard cylinder portion 19. Of the inner covering cylinder portion 20, one side portion located on the one side is thicker than the other side portion located on the other side. Further, an outer covering cylinder portion 21 that covers the outer peripheral surface of the hard cylinder portion 19 is connected to the inner covering cylinder portion 20 through a communication hole 22 formed in the small diameter portion 13. 21 is integrally formed.

  The elastic member 4 is formed in a cylindrical shape, for example, made of a rubber material and coaxially with the first axis O1, and both end portions 4a and 4b of the elastic member 4 in the first axis O1 direction are externally connected. It is connected to the material 2 and the inner member 3 separately. The elastic member 4 gradually decreases in diameter and increases in thickness from the other side toward the one side, and the other of the two ends 4a and 4b in the first axis O1 direction of the elastic member 4 The large-diameter end portion 4a on the side has a larger diameter than the small-diameter end portion 4b on the one side.

  The large-diameter end 4a of the elastic member 4 is connected to the enlarged-diameter portion 16 of the outer member 2 by vulcanization adhesion, and the small-diameter end 4b is an outer peripheral surface of the one end of the inner member 3, The elastic member 4 closes the outer member 2 from the one side. The large-diameter end portion 4a of the elastic member 4 is connected to the one side portion of the inner covering cylinder portion 20, and in the illustrated example, the elastic member 4 and the first covering cylinder portion 24 of the inner member 3, And the 2nd coating | coated cylinder parts 20 and 21 of the outer member 2 are integrally formed with the same material.

  The partition member 10 is disposed coaxially with the first axis O1. The partition member 10 is configured by an annular member 25 fitted in the outer member 2 and an elastically deformable elastic wall portion 26 which is disposed in the annular member 25 and formed of, for example, a rubber material. The elastic wall portion 26 and the ring member 25 are both arranged coaxially with the first axis O1, and the outer diameter of the elastic wall portion 26 is the inner diameter of the large-diameter end portion 4a of the elastic member 4. Is smaller than

  The ring member 25 is fitted in the outer member 2, and is fitted in the other side portion of the inner covering cylinder portion 20 in the illustrated example. In addition, the outer peripheral edge of the ring member 25 is connected to the inner peripheral edge of the abutting flange portion 27 abutted against the flange portion 14 of the outer member 2 from the other side. The outer peripheral edge 31 of the elastic wall 26 is vulcanized and bonded to the inner peripheral surface of the ring member 25. As a result, the outer peripheral edge 31 of the elastic wall 26 is connected to the outer member 2 via the ring member 25.

The elastic wall portion 26 is formed in an inverted bowl shape. In the elastic wall portion 26, the intermediate portion 32 positioned between the central portion 28 located on the first axis O1 and the outer peripheral edge portion 31 gradually increases from the outer peripheral edge portion 31 side toward the central portion 28 side. It is curved to be convex toward the one side as well as toward the one side, and is thick.
A central portion 28 of the elastic wall portion 26 is connected to the inner member 3. In the present embodiment, the central portion 28 is formed with a through hole 29 disposed coaxially with the first axis O1, and the inner peripheral surface of the through hole 29 is coaxial with the first axis O1. It is vulcanized and bonded to a connecting ring 30 that is disposed and through which the connecting bolt is inserted. Then, the connecting bolt inserted into the connecting ring 30 from the other side is screwed into the female screw portion 23a of the hard column portion 23, whereby the central portion 28 of the elastic wall portion 26 is attached to the hard column portion 23. Connected.

  The cover member 7 is disposed coaxially with the first axis O1 and is formed in an inverted hat shape, and the outer peripheral edge portion 7a of the collar portion of the cover member 7 is formed in a U-shape in a longitudinal sectional view that opens to the one side. It is bent. The cover member 7 is disposed in the large-diameter portion 15 of the outer member 2, and the outer peripheral edge portion 7 a of the cover member 7 includes the abutting flange portion 27 of the partition member 10 and the large-diameter portion 15 of the outer member 2. Of these, it is sandwiched between the opening end 15a on the other side caulked inside.

  The diaphragm 6 is disposed coaxially with the first axis O1 and is formed in an inverted hat shape, and the outer peripheral edge 6a of the flange portion of the diaphragm 6 is disposed within the outer peripheral edge 7a of the cover member 7, It is sandwiched between the outer peripheral edge portion 7 a and the abutting flange portion 27 of the partition member 10. Thereby, the diaphragm 6 is fixed in the outer member 2, and the outer member 2 is closed from the other side.

  As shown in FIG. 2, a plurality of elastic partition walls 12 are formed of an elastic material made of, for example, a rubber material, and the elastic body member 4, the first covering cylinder portion 24 of the inner member 3, and the second covering of the outer member 2. The cylindrical portions 20 and 21 are integrally formed of the same material and are liquid-tightly connected to the elastic wall portion 26 of the partition member 10 from the one side of the elastic wall portion 26.

Further, two (a plurality) of elastic partition walls 12 are arranged at intervals in the circumferential direction. In the present embodiment, the elastic partition walls 12 are point-symmetric with respect to the first axis O1 in the cross-sectional view. Has been placed. Each elastic partition wall 12 gradually increases from the inner end connected to the outer peripheral surface 3a of the inner member 3 toward the outer end connected to the inner peripheral surface 2a of the outer member 2 in the cross sectional view. The outer end portion of each elastic partition wall 12 is connected to the side portion of the outer member 2. In the illustrated example, the size of the inner end portion of the elastic partition wall 12 along the circumferential direction is smaller than the diameter of the inner member 3.
Further, the pair of wall surfaces 12a and 12b that define the divided main liquid chamber 11 in the elastic partition wall 12 extend along the direction of the first axis O1.

In the present embodiment, at least one of the pair of wall surfaces 12a and 12b and the center line CL of the elastic partition wall are arranged so as to avoid the shortest imaginary line V2 in the cross sectional view. ing.
In the illustrated example, the pair of wall surfaces 12a and 12b extend linearly and along the radial direction in the cross-sectional view, and the pair of wall surfaces 12a and 12b Of these, the first wall surface 12a extends so as to be inclined with respect to the shortest virtual line V2. And this 1st wall surface 12a is arrange | positioned so that the said shortest virtual line V2 may be avoided over the full length. On the other hand, of the pair of wall surfaces 12a and 12b, a second wall surface 12b different from the first wall surface 12a is disposed on the shortest virtual line V2 over the entire length, and the pair of wall surfaces 12a, 12b are mutually non-parallel.

Further, in the cross-sectional view, the center line CL of the elastic partition wall 12 extends along the radial direction so as to pass through the center of the elastic partition wall 12 in the circumferential direction, and the shortest over the entire length. It is arranged so as to avoid the virtual line V2, and extends with an inclination with respect to the shortest virtual line V2. The center lines CL of the elastic partition walls 12 extend in parallel with each other and are located on the same straight line.
Further, in the cross sectional view, the center line CL and the first wall surface 12a are inclined with respect to a reference axis L that extends along the longest virtual line V1 and is orthogonal to the first axis O1. The second wall surface 12 b extends so as to be orthogonal to the reference axis L.

  1 and 2, the divided main liquid chamber 11 includes the inner covering cylinder portion 20 of the outer member 2, the first covering cylinder portion 24 of the inner member 3, the elastic body member 4, and the partition member 10. It is defined by the elastic wall portion 26 and the elastic partition wall 12.

The two restriction passages 35 are formed in the partition member 10. These restriction passages 35 include a circumferential groove 36 formed in the ring member 25, a main liquid chamber side opening 37 that communicates the circumferential groove 36 and the main liquid chamber 8, and the circumferential groove 36 and the auxiliary liquid chamber 9. A secondary liquid chamber side opening (not shown) that communicates.
Two circumferential grooves 36 are formed on the outer circumferential surface of the ring member 25, and these circumferential grooves 36 are not in communication with each other, and an opening of each circumferential groove 36 is formed on the other side of the inner covering cylinder portion 20. It is occluded by the side part.
The main liquid chamber side opening 37 communicates the circumferential groove 36 and the main liquid chamber 8 through a communication groove 38 formed in the one side portion of the inner coating cylinder portion 20.

  The channel length and the channel cross-sectional area of each restriction passage 35 are set (tuned) so that the resonance frequency of the restriction passage 35 becomes a predetermined frequency. Examples of the predetermined frequency include a frequency of idle vibration (for example, a frequency of 18 Hz to 30 Hz and an amplitude of ± 0.5 mm or less), and a shake vibration having a frequency lower than that of the idle vibration (for example, a frequency of 14 Hz or less, A frequency of which the amplitude is larger than ± 0.5 mm). Further, the resonance frequencies of the restricting passages 35 may be different from each other or may be equal to each other.

The vibration isolator 1 configured as described above is a compression type (upright type) attached so that the main liquid chamber 8 is positioned on the upper side in the vertical direction and the sub liquid chamber 9 is positioned on the lower side in the vertical direction. ing.
When the vibration isolator 1 is attached to, for example, an automobile, the outer member 2 is connected to an engine as a vibration generating unit, while the inner member 3 receives vibration through the mediating member 17 and a bracket (not shown). It is connected to the car body as a part. In an automobile, main vibration along the vertical direction and side vibration along the front-rear direction or the left-right direction of the vehicle body are easily input from the engine to the vehicle body. Therefore, the vibration isolator 1 is attached, for example, so that the reference axis L coincides with the front-rear direction or the left-right direction, and main vibration is input in the direction of the axis O1, and among the radial directions, A secondary vibration is input in a direction along the axis L.

  When the main vibration is input to the vibration isolator 1 and the outer member 2 and the inner member 3 are relatively displaced in the direction of the first axis O1, the elastic member that connects the outer member 2 and the inner member 3 to each other. 4 is elastically deformed while elastically deforming the elastic partition wall 12, and the volume of the divided main liquid chamber 11 is increased or decreased. At this time, the elastic member 4 is arranged such that both end portions 4a and 4b in the first axis O1 direction connected to the outer member 2 and the inner member 3 are relatively displaced in the first axis O1 direction. , And elastically deforms starting from the large-diameter end 4a.

  Further, as described above, when the elastic member 4 is elastically deformed while elastically deforming the elastic partition wall 12, the elastic wall portion 26 is also elastically deformed. Then, due to the elastic deformation of the elastic wall portion 26, the volume of the divided main liquid chamber 11 changes opposite to the increase / decrease of the volume due to the elastic deformation of the elastic member 4, and decreases or increases. At this time, of the elastic wall portion 26, an outer peripheral edge portion 31 that is a connecting portion with the outer member 2 and a central portion 28 that is a connecting portion with the inner member 3 are relatively aligned in the first axis O1 direction. The elastic wall portion 26 is elastically deformed so as to be displaced.

  Therefore, for example, by making the amount of volume change increased or decreased by elastic deformation of the elastic member 4 larger than the amount of volume change decreased or increased by elastic deformation of the elastic wall portion 26, the divided main liquid The volume of the chamber 11 can be changed. As a result, it becomes possible to cause liquid to reciprocate between the divided main liquid chamber 11 and the sub liquid chamber 9 through the restricting passage 35 and cause liquid column resonance in the restricting passage 35, and to absorb and attenuate the main vibration. be able to. In the present embodiment, when the main vibration is input to the vibration isolator 1, the volumes of the two divided main liquid chambers 11 change simultaneously, and the liquid flows through the two restriction passages 35 at the same time. Become.

  Here, in the present embodiment, the first wall surface 12a and the center line CL of the elastic partition wall 12 are disposed so as to avoid the shortest imaginary line V2 in the cross-sectional view. In the surface 12a, it is possible to easily secure the length from the inner end connected to the outer peripheral surface 3a of the inner member 3 to the outer end connected to the inner peripheral surface 2a of the outer member 2. Thus, the elastic partition wall 12 can have high flexibility. Therefore, as described above, when the main vibration is input to the vibration isolator 1 and the elastic partition wall 12 is elastically deformed, the stress acting on the elastic partition wall 12 is distributed over the entire elastic partition wall 12 to be elastic. It is possible to suppress the local concentration of stress on the partition wall 12.

  On the other hand, when the secondary vibration is input to the vibration isolator 1 and the outer member 2 and the inner member 3 are relatively displaced in the radial direction, the elastic body member 4, the elastic partition wall 12, and the elastic wall portion 26 are moved. Elastically deforms.

  At this time, in one divided main liquid chamber 11 located on the displacement side in which the inner member 3 is displaced with respect to the second axis O2 of the outer member 2, the volume is increased by the elastic member 4 being deformed to the displacement side. On the other hand, the elastic partition wall 12 and the elastic wall portion 26 are deformed to the displacement side to reduce the volume. Therefore, the volume of one divided main liquid chamber 11 is increased by, for example, increasing the volume reduction amount due to deformation of the elastic partition wall 12 and the elastic wall portion 26 compared to the volume increase amount due to deformation of the elastic member 4. Can be reduced as a whole.

  Further, in the other divided main liquid chamber 11 located on the opposite displacement side to the displacement side, the elastic partition wall 12 and the elastic wall portion 26 are deformed to the displacement side to increase the volume, and the elastic member 4. Is deformed to the displacement side to reduce the volume. Therefore, the volume of the other divided main liquid chamber 11 is increased by increasing the volume increase due to deformation of the elastic partition wall 12 and the elastic wall portion 26 as compared with the volume decrease due to deformation of the elastic body member 4, for example. Can be increased as a whole.

  As described above, the restriction passage 35 is formed between the divided main liquid chamber 11 and the sub liquid chamber 9 by reducing the volume in one divided main liquid chamber 11 and increasing the volume in the other divided main liquid chamber 11. It is possible to cause the liquid to reciprocate and cause liquid column resonance in the restriction passage 35, and to absorb and attenuate the side vibration. In this embodiment, while the sub-vibration is input, one divided main liquid chamber 11 and the other divided main liquid chamber 11 are alternately expanded and contracted, and the liquid flows through the two restriction passages 35 at the same time. It will be.

  Here, in this embodiment, since the elastic partition wall 12 has high flexibility, the elastic partition wall 12 is elastically deformed when the secondary vibration is input to the vibration isolator 1 and the elastic partition wall 12 is elastically deformed. The stress acting on the elastic partition wall 12 can be dispersed throughout the elastic partition wall 12 to suppress local concentration of the stress on the elastic partition wall 12.

  As described above, according to the vibration isolator 1 according to the present embodiment, when the main vibration and the sub vibration are input to the vibration isolator 1, the stress acting on the elastic partition wall 12 is elastically partitioned. Since the stress can be dispersed throughout the wall 12 and local concentration of stress on the elastic partition wall 12 can be suppressed, the performance of the elastic partition wall 12 can be easily maintained over a long period of time.

Further, since the first wall surface 12a extends so as to be inclined with respect to the shortest imaginary line V2 in the cross-sectional view, from the inner end portion to the outer end portion in the first wall surface 12a. It becomes possible to make it easier to ensure the length until the elastic partition wall 12 has higher flexibility.
In addition, when the 1st wall surface 12a inclined with respect to the said shortest virtual line V2 is avoiding this shortest virtual line V2 like this embodiment, the above-mentioned effect can be reliably achieved.

In addition, the inner member 3 and the outer member 2 are configured such that the lengths of the virtual lines V1 and V2 are different from each other by forming the inner peripheral surface 2a of the outer member 2 in a non-circular shape in the cross-sectional view. Therefore, the inner member 3 and the outer member 2 can be arranged coaxially, and the configuration of the vibration isolator 1 can be simplified.
Furthermore, the inner member 3 and the outer member 2 are configured so that the lengths of the virtual lines V1 and V2 are different from each other when the outer member 2 has a rectangular shape in the cross-sectional view. Variations in the layout of the vibration isolator 1 can be increased.

  In the present embodiment, the first wall surface 12a is inclined with respect to the shortest imaginary line V2 in the cross sectional view, but may not be inclined. The second wall surface 12b may be inclined.

(Second Embodiment)
Next, a vibration isolator according to a second embodiment of the present invention will be described.
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.

  As shown in FIG. 3, in the vibration isolator 40 according to the present embodiment, both the pair of wall surfaces 12c of the elastic partition wall 12 are disposed so as to avoid the shortest virtual line V2 in the cross sectional view. Has been. The pair of wall surfaces 12c extend so as to be inclined with respect to the reference axis L in the cross-sectional view, and are parallel to each other and extend linearly. The size along the circumferential direction is the same over the entire length from the inner end to the outer end. The entire elastic partition wall 12 is arranged so as to avoid the shortest virtual line V <b> 2, and the outer end portion of each elastic partition wall 12 is connected to the corner portion of the outer member 2.

  As described above, according to the vibration isolator 40 according to the present embodiment, both the pair of wall surfaces 12c are disposed so as to avoid the shortest virtual line V2 in the cross sectional view. In both of the pair of wall surfaces 12c, it becomes possible to easily secure the length from the inner end portion to the outer end portion, and to make the elastic partition wall 12 more flexible. Can do.

  In addition, since the pair of wall surfaces 12c extend in parallel and linearly in the cross-sectional view, when the secondary vibration is input to the vibration isolator 1, the elastic partition wall 12 It is possible to further suppress the local concentration of stress, and to easily maintain the performance of the elastic partition wall 12 reliably over a long period of time.

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.
For example, the cover member 7 may not be provided.
Moreover, in the said embodiment, although the restriction | limiting channel | path 35 shall be formed in the division member 10, it is not restricted to this, For example, you may form in the member different from the division member 10.
Furthermore, the outer member 2 and the inner member 3 may not be coaxial.

In the embodiment, the outer member 2 has a rectangular shape in the cross-sectional view, and the rectangular shape is formed by connecting straight side portions via corner portions. It is not limited to.
For example, the rectangular side portion is not limited to a linear shape, and may be a curved shape.
In addition, the outer member 2 can be appropriately changed to another shape that is a non-circular shape in the cross-sectional view. For example, as in the vibration isolator 50 shown in FIG. 4, the outer member 2 may be formed in an elliptical shape in the cross-sectional view. In the vibration isolator 50, the longest virtual line V1 extends along the major axis direction of the elliptical shape, and the shortest virtual line V2 extends along the minor axis direction of the elliptical shape. ing. In the illustrated example, the center lines CL of the elastic partition walls 12 extend in parallel with each other and are positioned so as to deviate from each other on the same straight line in the cross-sectional view. Furthermore, for example, the outer member 2 may have a square shape or the like in the cross-sectional view.

  Further, in the embodiment, the inner member 3 and the inner member 3 and the inner member 3 and the outer member 2 are formed so that the lengths of the virtual lines V1 and V2 are different from each other by forming the inner peripheral surface 2a of the outer member 2 in a non-circular shape in the cross sectional view. Although the outer material 2 is configured, the present invention is not limited to this, and the outer peripheral surface 3a of the inner member 3 has a non-circular shape such as a rectangular shape, an elliptical shape, or a square shape. The inner member 3 and the outer member 2 may be configured such that the lengths of the lines V1 and V2 are different from each other. In other words, the inner member and the outer member have a length of each imaginary line in which at least one of the outer peripheral surface of the inner member and the inner peripheral surface of the outer member has a non-circular shape in the cross-sectional view. It is possible to appropriately change to other configurations configured differently from each other.

Furthermore, in the above-described embodiment, at least one of the outer peripheral surface 3a of the inner member 3 and the inner peripheral surface 2a of the outer member 2 has a non-circular shape in the cross-sectional view, whereby each imaginary line V1 The inner member 3 and the outer member 2 are configured such that the lengths of V2 are different from each other. However, the present invention is not limited to this, and the inner member 3 and the outer member 2 are not limited to this. The lengths of the virtual lines V1 and V2 may be different from each other by shifting the axes O1 and O2 of the external member 2 from each other. In the vibration isolator 60, the longest virtual line V1 and the shortest virtual line V2 are located on the same straight line, and the longest virtual line V1 is orthogonal to the second axis O2. Further, the elastic partition walls 12 are arranged so as to be line symmetric with respect to the reference axis L in the cross sectional view.
In this case, for example, as in the illustrated example, the inner member 3 and the outer member 3a and the outer member 2 are formed so that the outer peripheral surface 3a of the inner member 3 and the inner peripheral surface 2a of the outer member 2 have a perfect circular shape in the cross sectional view. The material 2 can be configured, and the configuration of the vibration isolator 60 can be simplified.

In the embodiment, the wall surfaces 12a, 12b, and 12c extend linearly in the cross-sectional view. However, the wall surfaces 12a, 12b, and 12c are not limited to this, and may extend in a curved line, for example.
Furthermore, in the said embodiment, although the elastic partition wall 12 shall be formed integrally with the elastic body member 4, it is not restricted to this, For example, the elastic partition wall 12 is formed integrally with the elastic wall part 26. Or may be formed separately from each of the elastic member 4 and the elastic wall portion 26.

  In the above embodiment, the main liquid chamber 8 is divided into two divided main liquid chambers 11 by the elastic partition wall 12. However, the partition is not limited to this as long as it is divided into a plurality of divided main liquid chambers 11. It is not something that can be done. For example, a plurality of elastic partition walls 12 may be arranged so as to be radial in the cross sectional view. Thereby, the damping characteristic with respect to the vibration along several directions among radial directions can be exhibited effectively.

  Further, the inner member 3 and the outer member 2 are not limited to those shown in the above-described embodiment. For example, the inner member 3 is configured by only the hard column portion 23, and the outer member 2 is configured by only the hard cylindrical portion 19. May be.

Moreover, in the said embodiment, although the outer member 2 was connected with the vibration generation part and the inner member 3 was connected with a vibration receiving part, it is not restricted to this, The outer member 2 is connected with a vibration receiving part. The inner member 3 may be coupled to the vibration generating unit. That is, the outer member 2 may be connected to either one of the vibration generating unit and the vibration receiving unit, and the inner member 3 may be connected to either one.
Further, in the above embodiment, the compression type is shown as the vibration isolator 1, 40, 50, 60, but the main liquid chamber is positioned on the lower side in the vertical direction and the sub liquid chamber is mounted on the upper side in the vertical direction. A suspension type vibration isolator may be used.

  Moreover, the partition member 10 is not restricted to what was shown to the said embodiment. For example, a partition member is disposed in the outer member, and the outer member is partitioned in the axial direction of the inner member into a pressure receiving liquid chamber and a sub liquid chamber in which liquid is sealed, and in the axial direction of the inner member. When the vibration is input along the elastic member, the divided liquid chambers and sub liquid chambers are expanded and contracted separately, so that the vibration isolator of another configuration that attenuates and absorbs the vibration can be The invention can also be applied.

  Furthermore, in the above-described embodiment, the auxiliary liquid chamber and the partition member are provided. However, these may be omitted. For example, the elastic member is elastic when vibration is input along the axial direction of the inner member. It is also possible to apply the present invention to a vibration isolator having another configuration that attenuates and absorbs vibration by deforming and expanding and contracting each of the plurality of divided liquid chambers.

  Furthermore, the present invention provides an inner member connected to any one of the vibration generating portion and the vibration receiving portion, a cylindrical outer member connected to the other, and an elastic member connecting these two members. The pressure-receiving liquid chamber in the outer member in which the elastic member is a part of the wall surface and in which the liquid is enclosed is connected to the outer peripheral surface of the inner member and the inner peripheral surface of the outer member, thereby dividing the plurality of divided liquid chambers. An elastic partition wall that divides into two, and when vibration is input along the radial direction of the inner member, each of the elastic body member and the elastic partition wall is elastically deformed, and the plurality of divided liquid chambers expand and contract individually. Thus, it can be appropriately employed in a vibration isolator having another configuration that attenuates and absorbs vibration.

  The vibration isolator 1 according to the present invention is not limited to an engine mount of a 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.

1 Vibration isolator 2 External material 2a Inner peripheral surface
3 inner member 3a outer peripheral surface 4 elastic body member 8 main liquid chamber (pressure receiving liquid chamber)
11 Divided main liquid chamber (divided liquid chamber)
12 Partition walls 12a, 12b, 12c Wall surface O1 Axis V2 Shortest imaginary line

Claims (4)

An inner member connected to one of the vibration generator and the vibration receiver, and a cylindrical outer member connected to the other;
An elastic member connecting these two members;
The elastic member is a part of the wall surface, and the pressure receiving liquid chamber in the outer member in which liquid is sealed is divided into a plurality of parts by connecting the outer peripheral surface of the inner member and the inner peripheral surface of the outer member. An anti-vibration device comprising an elastic partition wall partitioned into a liquid chamber,
The inner member and the outer member extend from each position along the circumferential direction of the inner member on the outer circumferential surface of the inner member to reach the inner circumferential surface of the outer member along the radial direction of the inner member. The length of each imaginary line made is different from each other,
In a cross-sectional view orthogonal to the axis of the inner member, at least one of a pair of wall surfaces defining the divided liquid chamber in the elastic partition wall, and a center line of the elastic partition wall are the imaginary lines. Arranged to avoid the shortest virtual line ,
In the cross-sectional view, the pair of wall surfaces are parallel to each other and extend linearly . An inner member connected to one of the vibration generator and the vibration receiver, and a cylindrical outer member connected to the other;
An elastic member connecting these two members;
The elastic member is a part of the wall surface, and the pressure receiving liquid chamber in the outer member in which liquid is sealed is divided into a plurality of parts by connecting the outer peripheral surface of the inner member and the inner peripheral surface of the outer member. An anti-vibration device comprising an elastic partition wall partitioned into a liquid chamber,
The inner member and the outer member extend from each position along the circumferential direction of the inner member on the outer circumferential surface of the inner member to reach the inner circumferential surface of the outer member along the radial direction of the inner member. The length of each imaginary line made is different from each other,
In a cross-sectional view orthogonal to the axis of the inner member, at least one of a pair of wall surfaces defining the divided liquid chamber in the elastic partition wall, and a center line of the elastic partition wall are the imaginary lines. Arranged to avoid the shortest virtual line,
In the cross-sectional view, the inner member and the outer member are configured such that the length of each imaginary line is different from each other when the outer member has a rectangular shape or an elliptical shape. Anti-vibration device. The vibration isolator according to claim 1 or 2 ,
In the cross-sectional view, at least one of the pair of wall surfaces extends so as to be inclined with respect to the shortest virtual line. The vibration isolator according to any one of claims 1 to 3 ,
In the cross-sectional view, both of the pair of wall surfaces are arranged so as to avoid the shortest virtual line.

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